Antentop 2011 01

ANTENTOP 01 2011 # 015
ANTENTOP is FREE e-magazine devoted to ANTENna’s
Theory,
1-2011 Operation, and
Practice
Edited by hams for hams
In the Issue:
Antennas Theory!
Practical design of HF Antennas!
Underground Antennas!
Practical design of VHF/UHF
Antennas!
Regenerative Receiver!
And More….
Efficient Dipole Antenna
UA6HJQ
Thanks to our authors:
Prof. Natalia K.Nikolova
Nick Kudryavchenko, UR0GT
Boris Krivosheev, R9WI
Igor Lavrushov , UA6HJQ
Vladimir Semenov, RU4SJ
Roman Sergeev, RN9RQ
And others…..
DL1BA Fuchs Antenna
for the 2- meter Band
EDITORIAL:
Well, my friends, new ANTENTOP –
01 -2011 come in! ANTENTOP is just
authors’ opinions in the world of
amateur radio. I do not correct and
re-edit yours articles, the articles are
printed “as are”. A little note, I am not
a native English, so, of course, there
are some sentence and grammatical
mistakes there… Please, be
indulgent!
ANTENTOP 01 –2011 contains
antenna articles, description of
antenna patent, Regenerative
Receiver. Hope it will be interesting
for you.
Our pages are opened for all
amateurs, so, you are welcome
always, both as a reader as a writer.
Copyright: Here at ANTENTOP we
just wanted to follow traditions of FREE
flow of information in our great radio
hobby around the world. A whole issue of
ANTENTOP may be photocopied, printed,
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us, and thus it belongs to all of us. This
doesn't mean that there are no copyrights.
There is! Any work is copyrighted by the
author. All rights to a particular work are
reserved by the author.
73! Igor Grigorov, VA3ZNW
ex: RK3ZK, UA3-117-386,
UA3ZNW, UA3ZNW/UA1N,
UZ3ZK
op: UK3ZAM, UK5LAP,
EN1NWB, EN5QRP, EN100GM
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ANTENTOP is FREE e-magazine, available FREE at http://www.antentop.org/

ANTENTOP- 02- 2010, # 014 Editorial
Welcome to ANTENTOP, FREE e - magazine!
ANTENTOP is FREE e- magazine, made in
PDF, devoted to antennas and amateur radio.
Everyone may share his experience with others
hams on the pages. Your opinions and articles are
published without any changes, as I know, every
your word has the mean.
Every issue of ANTENTOP is going to have 100
pages and this one will be paste in whole on the site.
Preview's files will be removed in this case. I do not
know what a term for one issue will need, may be 8-
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A little note, I am not a native English, so, of
course, there are some sentence and grammatical
mistakes there… Please, be indulgent!
Preview: Some articles from "cooking" issue will be
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as I think, it must be something mysterious in every
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Publishing: If you have something for share with
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Your opinion is important for me, so,
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Copyright Note:
Dear friends, please, note, I respect Copyright.
Always, when I want to use some stuff for
ANTENTOP, I ask owners about it. But… sometimes
my efforts are failed. I have some very interesting
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I have a big collection of pictures, I have got the
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using, and so on... I use to the pictures (and seldom,
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the owners still are alive, please, contact with me, I
immediately remove any Copyright stuff, or, if it is
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I do not know, why the owners do not response me. Are they still alive? Do their companies are a
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Grigorov, the editor of the magazine) do not get any
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ANTENTOP… but I have no enough time to translate
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and, they will do this work, and we will see lots
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ANTENTOP, please contact with me. A commercial
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NB: Please, use only plain text and mark email
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73! Igor Grigorov, VA3ZNW
ex: UA3-117-386, UA3ZNW, UA3ZNW/UA1N, UZ3ZK, RK3ZK
op: UK3ZAM, UK5LAP,EN1NWB, EN5QRP, EN100GM
http://www.antentop.org/ Editorial

ANTENTOP- 01- 2011, # 015 Table of Contents
Table of Contents
Antenna Theory Page
1
Cylindrical Antennas - Classical Theoretical Models: by: Prof. Natalia
K. Nikolova
Dear friends, I would like to give to you an interesting and reliable
antenna theory. Hours searching in the web gave me lots
theoretical information about antennas. Really, at first I did not
know what information to chose for ANTENTOP.
Now I want to present to you one more very interesting Lecture - it
is LECTURE 9: Cylindrical Antennas - Classical Theoretical
Models.
Reciprocity theorem. Self-impedance of a dipole using the
induced emf
method. Pocklington's equation. Hallen's equation...
5- 24
HF- Antenna Practice
2
Super Broad Band HF- VHF Antenna: Igor Lavrushov, UA6HJQ
I desperately need in RX/TX antenna that could be work at
HF- VHF bands without any tuning. The antenna should
be work at any conditional and should be simple in design.
Below you find description of my design of such antenna…
25- 27
3
Vertical for the 20- meter Band: by: Boris Krivosheev (R9WI ex
RA9WFD)
The antenna design is based on the known “Bazooka” antenna…
28- 29
4
Helical Antenna for 20 meters Band: by: Vladimir Semenov (RU4SJ)
Antenna bandwidth 13.941- 14.504 MHz. SWR 1.0:1.0 at 14.207
MHz. The Helix Antenna was fed by 75- Ohm coaxial cable in
15.82- meter length...
30
5
Urban Antenna: by: Vladimir Semenov (RU4SJ)
I have to use the antenna with a transceiver with RF- power 87-
Wtts. Antenna was installed at a balcony in the second store of a
multi- store building. Direction of the balcony is to the South.
Antenna was tested at 80, 40 and 20- meter Band.
31- 32
Page 1 http://www.antentop.org/

Table of Contents
Page
6
Cylindrical EH- antenna for the 20- meter Band: by: Vladimir Semenov
(RU4SJ)
Design of a simple EH- Antenna for the 20- meter Band ...
33- 34
7
Multiband Vertical Stub Antennas: by: Roman Sergeev (RN9RQ)
Before describing of the antennas I would like to talk why those
ones were designed. At fall 2009 the Youth Collective Radio
Station RK9QWN had to change room inside the building. Old
antennas were removed because the roof was repaired. So it
needed to install new antennas.
The question was- what should be the antennas like?
35- 37
8
Asymmetrical Trap Dipole Antenna: by: Roman Sergeev (RA9QCE)
Ham knows and widely used to the Symmetrical Trap Dipole
Antennas. Classical example of such antenna is W3DZZ antenna.
At my opinion such antennas has just one benefit- patterns of the
antennas are almost the same at the different bands. However, the
antennas have lots disadvantages. There are heavy weight,
complexity in design, large enough windage, the narrow bandwidth
at the lower bands, high SWR at some bands.
Asymmetrical Dipole Antennas (that are used by hams) are free
from some of lacks of the Symmetrical Trap Dipole Antennas.
However the main lack of the Asymmetrical Dipole Antennas is the
main lobe of the diagram directivity at lower bands is toward to
main lobes at the other upper bands.
An antenna that is almost free from the disadvantages was design
by me by combination of these two types of antennas-
Symmetrical Dipole Antennas and Asymmetrical Dipole Antennas.
I called the new one prototype "Asymmetrical Trap Dipole
Antenna."
38- 39
9
Vertical Open Stub Antenna for the 40 and 20- meter Band: by: Nikolay
Kudryavchenko, UR0GT
The antenna has enough good parameters at the 40 and 20 meter
Bands. Antenna does not need any counterpoises. Antenna should
place at some distance (say more the 1- meter) above the ground.
To prevent radiation from the outer braid of the coaxial cable a
good RF- Choke should be installed at the feeding terminals...
40- 42

Table of Contents
10
Wire Antennas for the 160 and 80 meters: by: Nikolay Kudryavchenko,
UR0GT
The both antennas have resonance at 160 and 80- meter bands.
There are hi- ohmic antennas, so, these ones need an ATU for the
feeding
43- 48
11
MOXON for 15 and 10- meter Bands: by: Nikolay Kudryavchenko,
UR0GT
It is just Optimized Moxon for the 15 and 10- meter Bands.
49- 51
12
Antenna “Strela”: by: UA4SZ Valery Kiselev
Antenna Strela (in transcription from Russian it means “Arrow”) is
a modification of the well-known dipole antenna Bazooka that is
widely used by hams.
However antenna Strela is contained less stuff for manufacture,
antenna Strela is lighter then antenna Bazooka. Antenna Strela
has good matching with the coaxial cable and SWR of the antenna
on the working Band looks like better then Bazooka could provide
there
52- 55
13
Efficient Field Low Height Dipole Antenna for the 20- meter Band: by:
Igor Lavrushov, UA6HJQ
The antenna was designed for using in a mountain hiking where
the main requirement is a low weight and high efficiency at the
limited stuff around there.
56- 59
VHF- UHF- Antennas
14
YAGI for 145.5- MHz: by: Valery Kiselyov (UA4SZ)
Simple design of a vertical YAGI antenna for the 2- meter Band 60

Table of Contents
Page
15
145- MHz J- Antenna with no- Mast RF Current: by: Nikolay
It would be very conveniently if a J- Antenna would be grounded to
the metal mast. However there is a problem with an RF- current
leaking from the J- Antenna along the mast. It is a very simple
method to block the current...
61- 66
16
Fuchs Antenna for the 2- meter Band: by: Vasily Perov DL1BA (ex
UK8BA)
The antenna was made and tuned while only 30- minutes. It needs
a 126- cm length of wire in 3- mm diameter (9- AWG)… 67
17
Low Profile Antennas for the 435- MHz Band: By: Nikolay
Description of some low- profile antennas for the 435- MHz -
Band....
68- 74
18
145/435- MHz Vertical Dipole Antenna: By: Nikolay Kudryavchenko,
UR0GT
It is widely known two band antenna was a little modified to reach
good SWR at the two working bands- 145 and 435- MHz...
75- 77
19
Two Bands 144/430- MHz Antenna: by: Vladimir Semenov, RU4SJ
It is very simple two bands antenna that does not require tuning
when it made according to the design...
78
HISTORY
20
Regenerative HF- Receiver of the Beginner Radio Amateur: by: L.
Nikolaev, Radio #2, 1958, pp.: 20- 23
Description of a simple HF-Regenerative HF- Receiver for the
Beginner Radio Amateur...
79- 82

Table of Contents
Page
21
Underground Antennas of the Military Radio Center and Missile Silo:
Credit Line: Forum at www.cqham.ru
Description of some real Underground Antennas of the Russian
Military Radio Center and Missile Silo…
83- 87
22
Wish You Were There... Hamvention- 2011 and FDIM- 2011
Some memorable papers from Hamvention- 2011 and FDIM-
2011...
88-89
PATENTS
23
Stub Matched Antenna and Method the Feeding Same
Just Description of Patent of "Stub Matched Antenna and Method
the Feeding Same."
90- 97
24
Sound Powered Radio Transmitter
Description of Patent of a Sound Powered Radio Transmitter
98- 100
Page 4.1 http://www.antentop.org/

ANTENTOP- 01- 2011, # 015 Cylindrical Antennas – Classical
Theoretical Models
Feel Yourself a
Student!
Dear friends, I would like to give to you an interesting and reliable antenna theory. Hours searching in the web
gave me lots theoretical information about antennas. Really, at first I did not know what information to chose for
ANTENTOP. Finally, I stopped on lectures “Modern Antennas in Wireless Telecommunications” written by Prof.
Natalia K. Nikolova from McMaster University, Hamilton, Canada.
You ask me: Why?
Well, I have read many textbooks on Antennas, both, as in Russian as in English. So, I have the possibility to
compare different textbook, and I think, that the lectures give knowledge in antenna field in great way. Here first
lecture “Introduction into Antenna Study” is here. Next issues of ANTENTOP will contain some other lectures.
So, feel yourself a student! Go to Antenna Studies!
I.G.
My Friends, the above placed Intro was given at ANTENTOP- 01- 2003 to Antennas Lectures.
Now I know, that the Lecture is one of popular topics of ANTENTOP. Every Antenna Lecture
was downloaded more than 1000 times!
Now I want to present to you one more very interesting Lecture - it is a Lecture LECTURE 9:
Cylindrical Antennas – Classical Theoretical Models. I believe, you cannot find such info
anywhere for free! Very interesting and very useful info for every ham, for every radio-
engineer.
So, feel yourself a student! Go to Antenna Studies!
I.G.
McMaster University Hall Prof. Natalia K.
Nikolova
LECTURE 9: Cylindrical Antennas – Classical Theoretical Models
(Reciprocity theorem. Self-impedance of a dipole using the induced emf
method. Pocklington’s equation. Hallén’s equation.)
by Prof. Natalia K. Nikolova
www.antentop.org Page-5

Theoretical Models

ANTENTOP- 01- 2011, # 015 Super Broad Band HF- VHF Antenna
Introduction: I desperately need in RX/TX antenna
that could be work at HF- VHF bands without any
tuning. The antenna should be work at any
conditional and should be simple in design. Below
you find description of my design of such antenna.
Igor Lavrushov , UA6HJQ
Credit Line:
http://goryham.qrz.ru/ant/hf-wide.htm
From some time I used to an FT857D. This
transceiver has not an internal ATU, so, I have to use
only matched antenna with this rig. At first I tried a
length of a wire in 14 – meter going from a window of
my balcony to the ground at angle of 50 degree. This
wire was matched well at all HF- Bands and allowed
me did operation in the Air.
However, soon I understood that the antenna had
some disadvantages.
Firstly, when band has changed I have to go to the
next with the balcony room to tune up the antenna,
secondly, the antenna was too noisy. Figure 1
shows the antenna.
Figure 1 Wire antenna for FT857D
So I decided to design antenna that do not require
any tuning and that has no so much noise. It would
be possible if the resonance antenna was converted
to aperiodic antenna like a T2FD. However I have no
place for original T2FD, and I already have installed
the 14- meters length of wire, that is why
conversation to be applied only to the wire. Figure 2
shows schematic of the antenna. Resistor for 50-
Ohm is old surplus dummy load. Counterpoise is a 5-
meters length of wire that is placed around perimeter
of my balcony. Coaxial cable 50- Ohm from the
antenna to FT857D has the 7- meter length. Figure 2 Aperiodic antenna for FT857D

Test of the antenna: Noise was reduced to 3- 5
scale marks at the S- meter compare to resonance
antenna (antenna that was matched with FT857D
with the help of resonance ATU). Signals from ham
stations also drop down when the aperiodic antenna
was used but I could hear the signals better compare
to noisy resonance antenna. SWR for the aperiodic
antenna is 1.0:1.0 from 1.5- MHz to 450- MHz band.
When I tested the aperiodic antenna I as usual could
work with any ham station that I heard in the Air.
Then I compared the aperiodic and resonance
antenna at the 7- MHz band.
I tuned my 14- meters wire in the resonance at 7-
MHz with help of a shortening capacitor. As a result I
got a wire that could be with simple toggle switch turn
on or to resonance antenna (shortening capacitor) or
to aperiodic antenna (dummy load 50- Ohm in bridge
with the wire. I heard the Air and compared receiving
of the weak ham stations using resonance and
aperiodic antenna. The reception was almost the
same with the both antennas. However, with the
aperiodic antenna the noise was low down that acted
like improving of the performance of the aperiodic
antenna.
Figure 3 Aperiodic vertical antenna
Some data obtained from the test. I have got 59+5
from RW4CN (distance 1000 km) with the resonance
antenna and 58- 59 with the aperiodic one. I have got
59+10 from RA6FC (distance 3 km) with the
resonance antenna and 59 with the aperiodic one.
Some data obtained from the test. I have got 59+5
from RW4CN (distance 1000 km) with the resonance
antenna and 58- 59 with the aperiodic one. I have
got 59+10 from RA6FC (distance 3 km) with the
resonance antenna and 59 with the aperiodic one.
Aperiodic antenna loses to the resonance to
transmitting but gives good reception. My antenna
has length in 14- meters so the antenna works well
from 7- MHz and higher (I heard and could work with
different DX- Station and could open at 145/430-
MHz almost all local repiters) but does not work well
at 3.6 and 1.9- MHz band.
The aperiodic antenna may be used as the main, RX
or emergency antenna. You may convert any vertical
or dipole antennas to the aperiodic ones. I believe
that at good placement of the vertical or dipole
antenna you should get good performance in the Air.
Figure 3 shows aperiodic vertical antenna, Figure 4
shows aperiodic dipole antenna.
HF- Wide Band Antenna with Transformer
I decided improve the performance of my aperiodic
antenna at the HF- Bands. To get this improvement I
added an RF transformer 1:9. Figure 5 shows the
design of the improved antenna. Figure 6 shows the
design of the transformer 1:9.
Figure 5 Design of the improved HF- Wide Band
Antenna

Figure 6 Design of the RF transformer 1:9
At the design of the wide band antenna an RF
voltage through RF up- transformer 1:9 is going to the
antenna. So efficiency of the antenna would be better
(in theory) compare to the antenna from the Figure 2
because RF- voltage across of the antenna wire
should be higher compare to the simple wide band
antenna. RF Transformer is wound by three wires
twisted together. The winding is placed evenly around
the ferrite core. For my ferrite ring I got best result
with 5 turns around the ferrite core. Dummy Load for
the antenna was made with 15 resistors of 6.8-
kOhm/2- Watts that were bridged together. The load
could stand up to 100- Watts CW/SSB for 15-
minutes.
Note from I.G.: There are some limitations that could
turn antenna from the Figure 5 to losing antenna
compared to Figure 2.
SWR of the antenna from Figure 5 was almost
1.0:1.0 at the band from 1.8 to 14 MHz, then evenly
increase to 2.0:1.0 at 28- MHz band. The antenna
does not work at the UHF- Bands because of the
limitations of the transformer.
Figure 7 shows design of the wide band transformer
antenna for field conditions. Wire should not have
resonance at the amateur HF- bands. Such wire
may have length 23 or 12- meters. Any length of
wire (more the 5 meters) placed on the ground or
metal rod hammered in the ground would be acted
like a “ground” for the antenna.
Transformer with Load are placed inside a small
box, Two terminals “Antenna” and “Ground” are
placed at the one side of the box. RF socket of a PL-
Type for coaxial cable is placed at another side of
the box. The field antenna (Figure 7) works from
1.9- up to 31 – MHz band.
Figure 7 Field Wide Band Transformer Antenna
73!, UA6HJQ, Russia, Kislovodsk

ANTENTOP- 01- 2011, # 015 Vertical for the 20- meter Band
R9WI ex RA9WFD, Boris Krivosheev
Credit Line: http://www.cqham.ru/ant83_72.htm
The antenna design is based on the known “Bazooka”
antenna. Vertical part of the antenna is a half from the
“Bazooka” antenna. Counterpoises are usual for any
vertical antenna. I used two counterpoises because it is
hard to place more at my 45- degree- slope roof.
Vertical part of the antenna made of fiberglass tube
with diameter 14/10x2, 18/14x2, 23/19x2 (O/D/T). All
tubes were in 2- meter length. The tubes were
sandpapered degreased and coated with primer and
enamel paint.
Figure 1 shows antenna’s design. Figure 2 shows
design of part 1 from Figure 1. Figure 3 shows design
of part 2 from Figure 3. Figure 4 shows design of part
3 from Figure 1. Figure 5 shows way to insert coaxial
cable into the tube.
Antenna is tuned to resonance with help of the length
of the counterpoises. It needs to use counterpoises
with length more the show at Figure 4. Then the
counterpoises are shortened to the antenna resonance.
The ends of counterpoises that connected to feeding
coaxial cable are placed at one meter above the metal
roof. Another ends of the counterpoises fastened
through ceramic nut insulators at the hip of the roof.
My antenna was installed on the roof of the 5- level
house that has height at 22 meters. The antenna has
almost omnidirectional pattern. Figure 6 shows data
for the antenna . The data were taken off with help
Antenna Analyzer AA- 330.
Antenna made from different types of coaxial cables
(Russian coaxial cables: RK-50- 7- 13, RK- 75- 9- 16,
RK75-4-113) was tried and tested in field conditions.
R9WI ex RA9WFD, Boris Krivosheev
There were almost no differences in the antenna
operation for all of the antenna design. However for
the real antenna coaxial cable (part 2 of the Figure
1) should be chosen on the antenna power. Antenna
was fed through 50- Ohm coaxial cable with the
length (it is noncritical) of 28- meter.
The antenna was tuned to resonance at the 20-
meter band. However my ICOM-746PRO with help
of the internal ATU could match the antenna on the
upper HF- Bands (off course, with some losses!)
from the 20 to 10 meter. With the the antenna I had
QSOs with Japan (6500- km) at 17 and 15 – meter.
Antenna may be used in field operation when
instead rigid tubes a plastic fishing rod would be
used.
73! RA9WFD
Classical Antenna Bazooka. I.V.
Picture from Internet

ANTENTOP- 01- 2011, # 015 Vertical for the 20- meter Band
Figure 1- Figure 6 Design of the Vertical Antenna
Figure 6 Data for the Vertical Antenna

ANTENTOP- 01- 2011, # 015 Helical Antenna for 20 meter Band
Vladimir Semenov (RU4SJ)
Credit Line:
http://hamradio.mari-
el.ru/technics/Spiral_RU4SJ/index.htm
Antenna bandwidth 13.941- 14.504 MHz. SWR
1.0:1.0 at 14.207 MHz. The Helix Antenna was fed
by 75- Ohm coaxial cable in 15.82- meter length.
Design: PVC Pipe in diameter 110- mm and length
68- cm was used for the antenna. Antenna was
wound by copper tube with OD 6- mm. Photos are
shown design of the antenna. Lower part of the
antenna contains 10 ¾ - turns and wound above the
tube. Middle part of the antenna contains 35.5 turns.
The coil is inside of the tube. Upper part of the
antenna contains 7 turns and wound above the pipe.
At the 20 meter Band the inner wire of the coaxial
cable is connected to 5 turn (from the cold end) and
ground of the coaxial cable is connected to the
beginning of the spiral. Antenna should be placed in
50 cm above a surface.
Band 15 meter: The antenna being tuned to 20-
meters should be matched at 15 – meter Band.
Band 10 meter: Antenna may be tuned at 10- meter
Band. Ground of the coaxial cable is connected to 6
turn (from the cold end) and inner wire of the coaxial
cable is connected through inductor (OD- 9- mm, 7
turns of 1,0- mm (18- AWG) copper wire) to 5th turn
from the cold end.
73! RU4SJ

ANTENTOP- 01- 2011, # 015 Urban Antenna
Credit Line: http://hamradio.mari-el.ru/technics/Gorodskaya_antenna_RU4SJ/index.htm
I have to use the antenna with a transceiver with RF-
power 87- Wtts. Antenna was installed at a balcony in
the second store of a multi- store building. Direction of
the balcony is to the South. Antenna was tested at 80,
40 and 20- meter Band.
At the 80 meter Band I have got: RW9SM- 58,
RA3RTS- 57, RN4HAX- 59, RW4LC- 59. At the 40
meter Band I have got: UU2UDE- 58, EW7EW- 56,
ER4ER- 59, RK6JAT- 59, UA6YBE- 59. At the 20
meter Band I have got: 4L3Y- 59, ER2OG- 58,
RZ6HJ- 59, UA6HN- 59, UA6GB- 59.

ANTENTOP- 01- 2011, # 015 Urban Antenna
The antenna has poor efficiency at the 80- meter Band.
However I believe that the efficiency may be improved
if perimeter of the antenna and diameter of the tube
(from which the antenna made of) increase in twice
times. Matching the antenna with the coaxial cable is
doing by moving the inner bridge.
Antenna has sharp matching. Tuning capacitor is
connected by Butterfly circuit. Counterpoises
connected to ground terminal of the transceiver
could be improved the antenna efficiency. Device
“Artificial Ground” could improve the efficiency of
the antenna as well.
Inductor (OD- 9- mm, 9 turns of 2- mm (AWG- 12),
length 25- mm) connected between coaxial shield and
antenna could expand the working range from 3.44-
MHz to 28.75- MHz and improve SWR but not for 15-
meter Band. Additional matching may require at the
band. However in my case I have got matching at the
15- meter just increased length of the feeding coaxial
cable on 1.85- meter.
73! RU4SJ

ANTENTOP- 01- 2011, # 015 Cylindrical EH- antenna
Credit Line: http://hamradio.mari-el.ru/technics/RU4SJ%20EH/index.htm
The antenna is one band antenna. It works on TX when
it is tuned to serial resonance. The antenna works only
to RX when this one is tuned to bridge resonance.
The antenna has efficiency like a lambda/4 vertical
antenna. As I believe in the antenna the outer braid
of the coaxial cable is radiated. It is need a part of
the coaxial cable near antenna to place in vertical
position.
www.cqham.ru

ANTENTOP- 01- 2011, # 015 Cylindrical EH- antenna
It is not wisely to use RF- Choke on a ferrite ring
because the heating the ring when the antenna is
transmitting, so, parameters of the antenna would be
changed also as well. RF- Choke should be made like
several (3-7) turns in 10- 20 cm in diameter coiled by
the feeding coaxial cable. The RF Choke is place on
the length near 5- meters from the antenna.
Antenna is tuned in to resonance:
Roughly: By choosing length of the coaxial cable from
Antenna to the RF- Choke
Fine: By changing parameters of the RF- Choke
(quantity of turns, diameter of the Choke).
You may try a phase EH- Antenna. With the antenna
placed near the window and with 100-Wtts I made
QSOs to distance up to 3000 km.
73! RU4SJ
Communication Point. USSR (end of 1970s- beginning of 1980s)
Photo taken from the Internet

ANTENTOP- 01- 2011, # 015 Multiband Vertical Stub Antennas
Roman Sergeev (RN9RQ)
Credit Line: http://www.cqham.ru/ant97_64.htm
Before describing of the antennas I would like to talk
why those ones were designed. At fall 2009 the
Youth Collective Radio Station RK9QWN had to
change room inside the building. Old antennas were
removed because the roof was repaired. So it
needed to install new antennas.
The question was- what should be the antennas
like?
Once night I was digging up models of antennas
bundled with Antenna Simulator MMANA – GAL
(may be loaded free, see Reference 1) and thinking
about antennas for limited space. Among butch of
the antennas I found of an interesting antenna for
the 20- meter Band (model /ANT/Match/Short-
Gamma-dipole.maa from the Antenna Simulator
MMANA – GAL).
It is very interesting antenna. In Reference 2 Igor
Goncharenko treats the antenna like a limit case for
shortening dipole with gamma matching (when the
gamma matching equal to the length of the
shortening antenna). At the other side it is usual stub
dipole. For future development of the antenna please
take attention that the dimensions of the antenna
would be resonance at 10- meter Band. On the base
of the two antennas was designed my antenna for
two Bands- the 20 and 40- meter. Figure 1 shows
design of the antenna.
MMANA file may be downloaded from:
http://www.antentop.org/015/ ant_1.maa
Adjusting and Matching of the Antenna: Antenna
has input impedance 150 Ohm at the 20- meter
Band. At the Band antenna is tuned in to resonance
by the height. At the 40 meter Band antenna is tuned
to resonance by the capacitor C1 (see Figure 1). At
the 40- meter it is possible to play with input
resistance of the antenna by changing wide between
the antenna wires. C1 just compensated the antenna
reactance. Relay K1 is switched ON/OFF the
capacitor that is provided the changing of the
antenna Band.
Figure 1 Vertical Stub Antenna for 40 and 20-
meter Band

Disadvantage of the antenna (Figure 1) is not smart
design. It is needed at least two spacer to build the
antenna. So it was created antenna without any
spacer. Figure 2 shows the design of the antenna.
Parameters of the antenna (Figure 2) are almost
equal to the antenna shown on Figure 1.
Disadvantage of the antenna (Figure 2) is that the
base distance is almost twice more longer with
antenna from Figure 1.
At the 40- meter Band the antenna has some
disadvantages. First is the narrow bandwidth. As
usual the bandwidth is not more then 60- kHz at
SWR 2.0:1. Satisfactory SWR may be reached only
at one portion (CW or SSB) of the 40- meter Band.
But the disadvantage is common for all types of the
shortening antennas. The problem may be solved if it
would be used additional relay to switch two
matching capacitors- one for CW portion and another
one for SSB portion of the 40- meter Band. Next
disadvantage (that is also common for shortening
antennas) is less gain with lambda/4 vertical
antenna. However the gain of the antenna would be
only less in 2- dB compare to lambda/4 vertical
antenna.
So what is about a multiband antenna that is in the
header? There is still spoken only about two Bands
antenna. Figure 3 corrects the situation.
The antenna works at 15 and 10- meter as Open
Sleeve” antenna. Such design already was done by
me and written off in Reference 3. It is possible to
add wires for WARC as it was made for 15 and 10-
meter Bands. Additional wires between gamma
match and antenna wire (it is only for 40- meter
Band) provide screening this antenna parts one
against another. It allows decrease distance between
the parts. So there is needed smaller spacer. By me
was used spacer in 450- mm length.
Adjusting and Matching of the Antenna: For
tuning the antenna it should be used a SWR- Bridge
or usual SWR- Meter.
At the 20- meter Band the antenna is tuned in to
resonance by the height. At the 40 meter Band
antenna is tuned by several steps.
Figure 2 Vertical Stub Antenna for 40 and 20-
meter Band without Upper Spacer
At first antenna is tuned by the capacitor C1 (see
Figure 3). Then antenna is tuned fine by changing
width. Then antenna again is tuned by C1 and tuned
fine by changing width. It is needed several step to
have the antenna tuned. After the antenna is tuned
to 20 and 40- meter Band the 15 and 10 meter Band
should be adjusted. It should be made just changing
length of the proper to the band wire.
Antennas shown on Figure 1, Figure 2 and Figure 3
were simulated in MMANA in case to be installed
those ones close to the ground (or equivalent of the
ground- metal or concrete roof). For the installation
several (the more the better) non- resonance
counterpoises (4- 6 meter length) may be used with
the antenna.

Figure 3 Vertical Stub Antenna for 40, 20, 15
and 10- meter Band
The antennas may be installed at height near one
meter above the ground. Resonance
counterpoises should be used at this placement.
Dimension of the antennas should be slightly
corrected if installation at more the one meter
above the ground is planned. Figure 4 shows
antenna from Figure 1 that is recalculated for free
space.
Described above antennas may be made from
strand copper or aluminum wire in diameter 1.5-
2.0- mm (15- 12- AWG).Wire in plastic insulation
may be used as well however the antennas size
should be decrease approximately on 2.4%
because shortening coefficient of the wire.
Below there are several words about feeding of
the antennas.
I suggest do matching of the antennas with coaxial
cable with help of transformer on ferrite tubes, so
called “binocular transformer.” It is possible to find
lots stuff about the “binocular transformer.” I
suggest References 4 and 5.
www.antentop.org
Figure 4 Vertical Stub Antenna for 40 and 20- meter
Band calculated for free space
Transformer may be installed straight away at antenna
terminals and use coaxial cable to feed the antenna.
Antenna may be fed by two wire ladder line and the
transformer may be installed at the shack.
References:
1. Antenna Simulator MMANA- GAL (try Google engine
for best result)
2. Igor Goncharenko: HF and VHF antennas. Part II.
Fundamentals and Practice – Moscow, : Radiosoft,
magazine "Radio", 2006.
3. Roman Sergeev: 8- Band Asymmetrical Dipole
Antenna – Moscow, magazine Radio, 2008
4. Semichev B: Ferrite RF transformers – Moscow,
magazine Radio, 2007. # 3, pp.: 68- 69.
5. http://cqham.ru/ant78_71.htm
73! Roman Sergeev (RN9RQ)
Page-37

ANTENTOP- 01- 2011, # 015 Asymmetrical Trap Dipole Antenna
Roman Sergeev (RA9QCE)
Credit Line: http://cqham.ru/ant78_71.htm
Ham knows and widely used to Symmetrical Trap
Dipole Antennas. Classical example of such antenna
is W3DZZ antenna. At my opinion such antennas has
just one benefit- patterns of the antennas are almost
the same at the different bands. However, the
antennas have lots deficiency. There are heavy
weight, complexity in design, large enough windage
and narrow bandwidth at the lower bands, high SWR
at some bands.
Asymmetrical Dipole Antennas (that are used by
hams) are free from some of lacks of the Symmetrical
Trap Dipole Antennas. However the main lack of the
Asymmetrical Dipole Antennas is the main lobe of the
diagram directivity at lower bands is toward to main
lobes at the other upper bands.
An interesting antenna was design by me by
combination of these two types of antennas-
Symmetrical Dipole Antennas and Asymmetrical
Dipole Antennas. I called it “Asymmetrical Trap
Dipole Antenna.” The antenna has pattern almost
similar to pattern of Symmetrical Trap Dipole
Antennas. However the antenna needs twice less
traps compare to Symmetrical Trap Dipole
Antennas. So, Asymmetrical Trap Dipole Antenna is
more easy to tune up and has less windage
(compare to Symmetrical Trap Dipole Antennas).
Figure 1 shows the design of the Asymmetrical Trap
Dipole Antenna. Dimensions of the antenna are
given for height 15 meter over the ground (there are
in the brackets dimension for height 15 meter over
the ground)
Figure 1 Asymmetrical Trap Dipole Antenna for the 40, 80 and 160- meter Bands
How the antenna works: At the 40- meter Band there
are left wire and wire up to trap on 7- MHz take part in
the antenna radiation. So it is asymmetrical dipole
with the ratio of the sides 1:2. At the 80- meter Band
there are left wire and wire up to trap on 3.5- MHz
take part in the antenna radiation. So it is
asymmetrical dipole with the ratio of the sides 1:2,
however, the left wire of the dipole is the less wire of
the antenna. At the 160- meter band all right part of
the antenna works. It is not classical asymmetrical
dipole with ratio 1:2. However because of the
inductors in the right wire and low height above the
ground the antenna may be matched with 110- Ohm
with SWR 1.25:1 .
The antenna has input impedance close to 110- Ohm
at its working Bands. Antenna may be match with 50-
Ohm coaxial cable by binocular transformer 1:2.56.
References 1, 2 are described such transformers. Do
not use autotransformers. As a rule autotransformer
does not provide cut-off RF current from the outer
braid of the coaxial cable.
So the cable would be radiated and very possible
RFI and TVI around of the antenna. It would be
useful to install RF choke on the coaxial cable before
the entering the cable in to the room.
To prevent breakdown of the transformer by static
electricity it should be installed resistor on 100-
kOhm (or more) in bridge with antenna wire (any of
them, or, that is better, between the middle point of
the transformer) and the braid of the coaxial cable.
The braid should be grounded in the shack. I made
traps for the antenna accordingly to Reference 3.
Picture of the similar traps are at Reference 4.
Figure 2 shows pattern of the antenna installed at
height 30 meter above the ground.
Adjusting of the antenna is usual for such kind of the
antennas. At the 40 meters antenna is tuned to the
resonance by proportional changing of the length of
two wires before trap for the 7- MHz.

ANTENTOP- 01- 2011, # 015 Asymmetrical Trap Dipole Antenna
At the 80- meter the antenna is tuned in to resonance
by wire between trap for 7- MHz and 3.5- MHz. At the
160- meter the antenna is tuned to resonance by the
length of the wire after trap to the 3.5- MHz. (See
Figure 1).
Similar to the antenna from the Figure 1 it is
possible to make two band antennas. Figure 3
shows Asymmetrical Trap Dipole Antenna for the 80
and 160- meter Bands.
Figure 2 Pattern of the Asymmetrical Trap Dipole Antenna installed at height 30 meter above the
ground
Dimensions are for the height of 15- meter above the
ground. The antenna may be fed directly by coaxial
cable 50 or 75 Ohm. RF choke installed near the
feeding terminal of the antenna would be very useful.
The choke may be made as several turns of the coax
above any ferrite ring.
The MMANA models of the antennas may be
loaded: http: //
www.antentop.org/015/ra9qce_015.htm
The models should be checked in the utility NEC2
for MMANA. The utility may be loaded from the link
at Reference 5.
Figure 3 Asymmetrical Trap Dipole Antenna for the 80 and 160- meter Bands for 80 and 160-meter Bands.
References:
1. http://forum.qrz.ru/showthread.php?t=12762
2. http://forum.cqham.ru/viewtopic.php?t=17233
3. http://dl2kq.de/soft/6-6.htm - Trap-rus
4. http://cqham.ru/trx84_11.htm
5. http://dl2kq.de/mmana/4-8.htm - NEC2 for MMANA
73! Roman Sergeev (RA9QCE).

ANTENTOP- 01- 2011, # 015 Vertical Open Stub Antenna for the 40 and 20-
meter Band
The publication is devoted to the memory
UR0GT.
By: Nikolay Kudryavchenko, UR0GT
The antenna has enough good parameters at the
40 and 20 meter Bands. Antenna does not need
any counterpoises. Antenna should place at some
distance (say more the 1- meter) above the ground.
To prevent radiation from the outer braid of the
coaxial cable a good RF- Choke should be installed
at the feeding terminals.
Figure 1 shows design of the Vertical Open Stub
Antenna for the 40 and 20- meter Band.
The MMANA model of the antenna
may be loaded: http: //
www.antentop.org/015/vosa_015.htm
Credit Line: Forum from:
www.cqham.ru
Figure 2 shows Z of the Vertical Open Stub Antenna
for the 40 and 20- meter Band at the 40- meter Band
(3- meter above the real ground) .
Figure 1 Design of the Vertical Open Stub Antenna for the 40 and 20- meter Band
http://www.antentop.org/ Page 40

ANTENTOP- 01- 2011, # 015 Vertical Open Stub Antenna for the 40 and
20- meter Band
Figure 3 shows SWR of the Vertical Open Stub
Antenna for the 40 and 20- meter Band at the 40
meter Band (3- meter above the real ground).
Figure 4 shows DD of the Vertical Open Stub
Antenna for the 40 and 20- meter Band at the 40
meter Band (3- meter above the real ground).
Figure 2 Z of the Vertical Open Stub Antenna for the 40 and 20- meter Band at the 40- meter Band (3- meter
above the real ground)
Figure 3 SWR of the Vertical Open Stub Antenna for the 40 and 20- meter Band at the 40 meter Band (3-
meter above the real ground)
Figure 4 DD of the Vertical Open Stub Antenna for the 40 and 20- meter Band at the 40 meter Band (3-

ANTENTOP- 01- 2011, # 015 Vertical Open Stub Antenna for the 40 and 20-
meter Band
Figure 5 shows Z of the Vertical Open Stub
Antenna for the 40 and 20- meter Band at the 20-
meter Band (3- meter above the real ground) .
Figure 6 shows SWR of the Vertical Open Stub
Antenna for the 40 and 20- meter Band
at the 20 meter Band (3- meter above the real ground).
Figure 7 shows DD of the Vertical Open Stub Antenna
for the 40 and 20- meter Band at the 20 meter Band (3-
meter above the real ground).
Figure 5 Z of the Vertical Open Stub Antenna for the 40 and 20- meter Band at the 20- meter Band (3- meter
above the real ground)
Figure 6 SWR of the Vertical Open Stub Antenna for the 40 and 20- meter Band at the 20 meter Band (3-
Figure 7 DD of the Vertical Open Stub Antenna for the 40 and 20- meter Band at the 20 meter Band (3-
http://www.antentop.org/ Page 42

ANTENTOP- 01- 2011, # 015 Wire Antennas for the 160 and 80 meters
The publication is devoted to the memory UR0GT.
www.cqham.ru
The both antennas have resonance at 160 and 80-
meter bands. There are hi- ohmic antennas, so,
these ones need an ATU for the feeding. Figure 1
shows design of the wire antenna with resonances at
1.85 and 3.65- MHz.
The MMANA model of the wire antenna with
resonances at 1.85 and 3.65- MHz
may be loaded: http: //
www.antentop.org/015/wire_015.htm
Figure 1 Design of the wire antenna with resonances at 1.85 and 3.65- MHz
Figure 2 shows Z of the Wire Antenna at the 160
meter Band (above real ground). Figure 3 shows
SWR of the Wire Antenna at the 160 meter Band
(above real ground). Figure 4 shows DD of the Wire
Antenna at the 160 meter Band (above real ground).
(above real ground). Figure 7 shows DD of the Wire
Antenna at the 80 meter Band (above real ground)
www.cqham.ru

Figure 2 Z of the Wire Antenna at the 160 meter Band (above real ground)
Figure 3 SWR of the Wire Antenna at the 160 meter Band (above real ground)
Figure 4 DD of the Wire Antenna at the 160 meter Band (above real ground

Figure 7 DD of the Wire Antenna at the 80 meter Band (above real ground)

Figure 8 shows design of the wire antenna with
resonances at 1.88 and 3.648- MHz.
The MMANA model of the wire antenna with
resonances at 1.85 and 3.65- MHz may be loaded:
http: // www.antentop.org/015/wire_015.htm
(above real ground). Figure 11 shows DD of the
Wire Antenna at the 160 meter Band (above real
ground).
(above real ground). Figure 14 shows DD of the
Wire Antenna at the 80 meter Band (above real
ground)
Figure 8 Design of the wire antenna with resonances at 1.85 and 3.65- MHz

73 Nick

ANTENTOP- 01- 2011, # 015 MOXON for 15 and 10- meter Bands
It is just Optimized Moxon for the 15 and 10- meter
Bands. Figure 1 shows design of the Optimized
Moxon for the 15 and 10- meter Bands
The MMANA model of the Optimized Moxon for the
15 and 10- meter Bands may be loaded:
http: // www.antentop.org/015/moxon_015.htm
Parameters of the antenna are shown at page 50
and page 51.
73 Nick
www.cqham.ru
Figure 1 Optimized Moxon for the 15 and 10- meter Bands
www.cqham.ru

Figure 2 Z of the Optimized Moxon at the 15- meter Band (7- meter above the real ground)
Figure 3 SWR of the Optimized Moxon at the 15- meter Band (7- meter above the real ground)
Figure 4 DD of the Optimized Moxon at the 15- meter Band (7- meter above the real ground)

Figure 5 Z of the Optimized Moxon at the 10- meter Band (7- meter above the real ground)
Figure 6 SWR of the Optimized Moxon at the 10- meter Band (7- meter above the real ground)
Figure 7 DD of the Optimized Moxon at the 10- meter Band (7- meter above the real ground)
w.antentop.org Page-51

ANTENTOP- 01- 2011, # 015 Antenna “Strela”
UA4SZ Valery F. Kiselev
Credit Line: Forum at:
www.cqham.ru and www.qrz.ru
Antenna Strela (in transcription from Russian it
means “Arrow”) is a modification of the well-known
dipole antenna Bazooka that is widely used by hams.
Figure 1 shows classical antenna “Bazooka.” (Credit
Line: http://www.amateur-radio-
wiki.net/images/1/18/Bazooka.jpg) Some parameters
of the antenna Strela are even better compare to
antenna Bazooka. Antenna Strela (similar to the
Bazooka) is short- circuited through the stub.
However antenna Strela is contained less stuff for
manufacture, antenna Strela is lighter then antenna
Bazooka. Antenna Strela has good matching with the
coaxial cable and SWR of the antenna on the
working Band looks like better then Bazooka could
provide there. Figure 2 shows design of the antenna
Strela.
Figure 1 Classical antenna “Bazooka”
Figure 2 Antenna Strela

Figure 2 shows formulas to find the dimensions of
the parts of the antenna. To find the dimensions (in
meters) it needs the digit shown on the antenna parts
to divide to the central working frequency (in MHz). It
works for coaxial with shortening coefficient 0.66. For
example, dimensions for antenna for the 40- meter
Band (central frequency= 7.09- MHz) should be:
72/7.09= 10.15- meter, 50/7.09= 7.05- meter,
22/7.09= 3.1- meter.
Antenna Strela may be placed horizontally
(preferably at height more the 0.25 lambda from the
ground), may be installed vertically or at some angle
to the ground. Antenna Strela may be installed similar
to I.V. antenna. Stub for the antenna should be made
from the coaxial cable that is used for feeding of the
antenna. It is possible to use 50 or 75- Ohm coaxial
cable for the antenna.
Antenna is tuned to the resonance by shorten of the
left part and lengthen of the right part of the antenna.
R3EC
Credit Line for Photo:
http://ric.cqham.ru/bigphoto.php?c=R3EC
Figure 3 Parameters of the Antenna Strela at the frequencies from 3.5 up to 4.0- MHz
Prototype of the antenna was made by UA4SZ for 2-
meter Band. Dimensions of the antenna: 49.5- 34.0-
15.0- cm. Antenna was installed vertically at a
window. The antenna worked great!
R3EC made the antenna for the 80- meter Band. The
antenna Strela was low- noise and very effective
compare to usual dipole. Figure 3 shows parameters
of the antenna at the frequencies from 3.5 up to 4.0-
MHz. At the figure Red color shows SWR Green
color shows R Blue color shows Z.

UA3NFI, Sergey, made antenna Strela for the 15-
meter Band. Figure 4 shows the antenna before
installation. Figure 5 shows the antenna on the roof.
Figure 4 Antenna Strela before installation
UA3NFI
Credit Line for Photo:
http://www.qrz.ru/callsign.phtml?callsign=UA3NFI
Figure 5 Antenna Strela on the roof

The dimensions of the 15- meter Band antenna
Strela were calculated with formulas from the Figure
2. It has got: 341.0- 237.0- 104.0- cm. However the
real antenna did not shot the resonance. Figure 6
shows parameters of the antenna at the frequencies
from 1 up to 30- MHz. At the figure Red color shows
SWR Green color shows R Blue color shows Z. The
real Antenna had resonance at 20- MHz. Input
impedance of the antenna was near 30- 40- Ohm at
the frequency. The resonance frequency of the
antenna was lowered due to the low height of the
installation of the antenna.
The antenna was tuned in to resonance by
shortening of the antenna parts. The right
dimensions (at UA3NFI installation) were: 325.0-
225.0- 100.0- cm. Figure 7 shows parameters of the
antenna at the frequencies from 1 up to 30- MHz.
Input impedance of the antenna was 60- 75- Ohm.
The antenna worked fine. However UA3NFI could
compare the antenna only with dipole for the 10-
meter Band that was tuned to the 15- meter band
with ATU. Antenna Strela gives +10- dB over the 10-
meter dipole.
Figure 6 Parameters of the Antenna Strela at the frequencies from 1 up to 30- MHz before tuning in to
resonance
Figure 7 Parameters of the Antenna Strela at the frequencies from 1 up to 30- MHz after set up to the
resonance

ANTENTOP- 01- 2011 # 015 Efficient Field Low Height Dipole Antenna
Igor Lavrushov, UA6HJQ
Credit Line: http://www.hamradio.cmw.ru/antenna/upa14.htm
The antenna was designed for using in a mountain
hiking where the main requirement is a low weight
and high efficiency at the limited stuff around there.
Field test shows that the antenna has almost circle
diagram directivity.
Antenna Design
Why symmetrical dipole antenna?
Symmetrical dipole antenna is mostly fitted for the
field conditions. Military, geologist expedition,
rescue and emergency communication service- all
of these are used a dipole antenna. The antenna
works well in the near zone (100- 200- 300- km,
depends on the Band) that is needed for
communication from a mounting trip. It is important
that the antenna would have some gain because in
the mountain it is used a QRP-equipment. Dipole
antenna works well in the forest, in the deep ravine,
among tents in Alpinist Camp. Figure 1 shows
design of the dipole antenna. The antenna has gain
plus 5- dBi.
The antenna is a symmetrical dipole (with length a
little bit more the lambdaé4) installed on the top of
a plastic fishing pole. The antenna is fed by a 50-
Ohm coaxial cable. The cable is matching with the
antenna with the help of two fixed capacitors. One
is connected to the central core another one is
connected to the braid of the coaxial cable. The
value of the capacitors (50- 200- pF) should be
found out for the current antenna system. Coaxial
cable at the feeding terminal is coiled (2- 3 turns)
on to a ferrite ring. Capacitors and the ferrite ring
should be protected from moisture. Those ones
may be placed into a plastic box (from an old 35-
mm film) or shrinked.
Figure 1 Field Dipole Antenna
www.antentop.org Page- 56

ANTENTOP- 01- 2011 # 015 Efficient Field Low Height Dipole Antenna for
the 20- meter Band
Antenna in the mountains Capacitors in the Film Box
Matching Box on the Antenna
www.antentop.org
Page- 57

the 20- meter Band
Stability of the mast of the antenna is provided by
on a guy and two antenna wires that are used like
two guys.
Three long screwdrivers are used like a peg for the
guys. Figure 2 shows installation of the mast of the
antenna.
Figure 2 Installation of the Mast of the Antenna
Antenna End Connection with a Guy
Fastened the Guy at the Ground

the 20- meter Band
Tuning of the Antenna
Install the antenna according to the Figure 2. Angle
between the antenna wires should be near 130-
degree. Length of the each wire is 6.0- meter. Turn
on the coaxial cable to a MFJ- 259 or to SWR-
meter plus Transceiver.
Conclusion
The antenna was tested in my mountain trips. It is
showed good result. I am strongly recommended
the antenna for one- day field operation as well as
for several- days mountain trip. Antenna may be
designed as for one band either for several
operation bands.
Do shortening the wires by length of the 10- cm by
low SWR. Sometimes it needs to change value of
the capacitors to reach the low SWR. As usual it is
possible to get SWR 1.0:1.0.
Multi Band Version of the Antenna
The Antenna may be made in a multi band version.
For the version antenna wires are broken into
lengths that would be resonance for the desire
bands. Shortening capacitor may be the same for
all of the bands. Turning on of the next band is
provided with the help of the jumper. Figure 3
shows the multi band antenna. Tuning of the
antenna begin from the upper band and
sequentially is going to the next lower band.
Unpacked Antenna Ready to Installation
Figure 3 Multiband Field Antenna
73! UA6HJQ

ANTENTOP- 01- 2011 # 015 YAGI for 145.5- MHz
Valery Kiselyov (UA4SZ)
Credit Line: http://www.hamradio.mari-el.ru/technics/UA4SZ
The vertical YAGI antenna has a sectioned half
wave vibrator. Coaxial cable is going inside of the
low half of the vibrator. To the low half of the
vibrator is connected braid of the coaxial cable.
The central core of the coaxial cable is connected
to the upper half of the sectioned vibrator. Such
design provides good symmetrical for the antenna
and low SWR with the 50- Ohm coaxial cable.
Antenna is radiated under a low vertical angle to
horizon that is perfect for 2- meters Band
communication. Antenna has gain near 8- 9-dB.
Figure 1 shows the design of the antenna.
Traverse of the antenna made from insulator stuff.
For example, it is possible to use an old skis stick.
As usual such stick has diameter 12… 14- mm.
Sectioned vibrator made from two metal tubes (it
may be aluminum or copper) in diameter 12… 14-
mm. Vibrator is fastened to the traverse with help
of two square plates made from insulator stuff.
Reflector and two directors of the antenna made
from aluminum strand wire in diameter 5- 6-mm.
However the reflector may be made from the same
tube that sectioned vibrator made. At this case the
reflector could be fastened to the traverse with help
of two triangles. The triangles may be from
insulator or ever metal stuff.
Antenna is fastened to the mast at the lower side of
Figure 1 YAGI for 145.5- MHz
the sectioned vibrator. Antenna may be
recalculated to other bands with help of the simple
equations.
Reflector: Length = 149.5/F; Vibrator: Length =
142/F; First Director: Length = 135/F;
Second Director: Length = 133/F; Distance
Reflector- Vibrator: 62.5/F; Distance Vibrator-
First Director and First Director - Second
Director: 55/F

ANTENTOP- 01- 2011 # 015 145- MHz J- Antenna with no- Mast RF Current
It would be very conveniently if a J- Antenna would
be grounded to the metal mast. However there is a
problem with an RF- current leaking from the J-
Antenna along the mast. It is a very simple method
The MMANA model of the 145- MHz J- Antenna
with no- Mast RF Current may be loaded: http: //
www.antentop.org/015/current_015.htm
to block the current. Just a lambda/4 resonator
should be installed straight under the J- Antenna.
The resonator may be installed at the opposite side
to the antenna or straight away under the antenna or
may be installed two resonators, one from the
opposite side of the antenna another under the
antenna. Program MMANA helps us to investigate all
of these implementations.
Figure 1 shows the J-Antenna with opposite choke
resonator. Figure 2 shows the current distribution in
the system- J-Antenna with opposite choke
resonator - Mast. Figure 3 shows impedance the
antenna. Figure 4 shows SWR the antenna. Figure
5 shows DD the antenna.
Figure 2 Current distributions in the system- J-
Antenna with opposite choke resonator - Mast Figure 1 J-Antenna with opposite choke
resonator

Figure 3 Z of the J-Antenna with opposite choke resonator - Mast
Figure 4 SWR of the J-Antenna with opposite choke resonator – Mast
Figure 5 DD of the J-Antenna with opposite choke resonator - Mast

Figure 6 shows the J-Antenna with choke resonator
straight away under the antenna resonator. Figure 7
shows the current distribution in the system- “J-
Antenna with choke resonator straight away under
the antenna resonator - Mast.”
Figure 8 shows impedance the antenna. Figure
9 shows SWR the antenna. Figure 10 shows DD
the antenna.
Figure 6 J-Antenna with choke resonator straight
away under the antenna resonator
Antenna with choke resonator straight away
under the antenna resonator - Mast

Figure 8 Z of the J-Antenna with choke resonator straight away under the antenna resonator
Figure 9 SWR of the J-Antenna with choke resonator straight away under the antenna resonator
Figure 10 DD of the J-Antenna with choke resonator straight away under the antenna resonator

Figure 11 shows the J-Antenna with two choke
resonators, one from the opposite side of the
antenna another under the antenna. Figure 12
shows the current distribution in the system- “J-
Antenna with two choke resonators, one from the
antenna - Mast.” Figure 13 shows impedance the
antenna. Figure 14 shows SWR the antenna.
Figure 15 shows DD the antenna.
Figure 11 J-Antenna with an with two choke
resonators, one from the opposite side of the
antenna another under the antenna
Antenna with two choke resonators, one from the
antenna - Mast

Figure 13 Z of the J-Antenna with two choke resonators, one from the opposite side of the antenna
another under the antenna
Figure 14 SWR of the J-Antenna with two choke resonators, one from the opposite side of the antenna
Figure 15 DD of the J-Antenna with two choke resonators, one from the opposite side of the antenna

ANTENTOP- 01- 2011 # 015 Fuchs Antenna for the 2- meter Band
Vasily Perov DL1BA (ex UK8BA)
The antenna was made and tuned while only 30-
minutes. It needs a 126- cm length of wire in 3- mm
diameter (9- AWG). Antenna has SWR 1.0:1.0 at
145.0- MHz and 1.7:1.0 at the borders of the 2-
meter band. Figure 1 shows the design of the
antenna. Figure 2 shows picture of the antenna.
Tuned antenna is placed into a plastic tube (used
at electrical wiring) in 25- mm (one inch) diameter.
Figure 2 Picture of the Fuchs Antenna Figure 1 Design of the Fuchs Antenna for the 2-
meter Band

ANTENTOP- 01- 2011 # 015 Low Profile Antennas for the 435- MHz Band
www.cqham.ru
www.radioscanner.ru
Antenna “Shaiba” (from Russian to English
“Shaiba” is a hockey puck) what is made by
http://www.antennaxxi.ru widely is used in Russia.
The antenna is used to in the mobile
communication, in the security and alarm system,
and anywhere where there is need to quick
installation of an antenna. Antenna “Shaiba” is low
profile antenna with a magnet base. It allows a
quick installation of the antenna to any iron (or
magnet) surface.
Antenna “Shaiba” was used in mobile
communication in the Moscow at the
commemoration of the 60- years from the end of
the ww2. Site http://www.antennaxxi.ru listed high
enough parameters for the Antenna “Shaiba.”
However, is it a true? One ham is opened an old
Antenna “Shaiba” for an investigation. Figure 1
shows design of the antenna.
Figure 1 Design of the antenna “Shaiba”
Credit Line: http://www.radioscanner.ru/forum/topic21444.html

Commentary by UR0GT: The Antenna “Shaiba” is
a modification of the well- known Stub Dipole
Antenna invented by Aleksandr Pistolkors in 1936.
The lambda /4 Stub Dipole Antenna has input
impedance 150- Ohm. (Note by I.G.: For example,
the antenna is described at: Constantine A.
Balanis: Antenna-Theory-Analysis-and-Design-
Third Edition).
Because of the form the Antenna “Shaiba” has
input impedance of 50-Ohm. Gain of the Antenna
“Shaiba” less compare to lambda/4 vertical antenna
(or vertical lambda /4 Stub Dipole Antenna). File
MMANA gives answer what the Antenna “Shaiba”
is. File MMANA for the Antenna “Shaiba” (designed
for the 435- MHz Band) may be downloaded from:
http://www.antentop.org/015/low_profile_antennas_015
Figure 2 shows design of the Antenna “Shaiba” for
the 435- MHz Band accordingly to the MMANA file.
Figure 3 shows Z of the Antenna “Shaiba” for the
435- MHz Band. Figure 4 shows SWR of the
Antenna “Shaiba” for the 435- MHz Band. Figure 5
shows DD of the Antenna “Shaiba” for the 435-
MHz Band.
A.A. Pistolkors
Russian Scientist in field of Radio and Antennas
28 September 1896 - 23 March 1996
Figure 2 Design of the Antenna “Shaiba”

Pistolkors Stub Antenna
Figure 3 Z of the Antenna “Shaiba” for the 435- MHz Band
Figure 4 SWR of the Antenna “Shaiba” for the 435- MHz Band

Figure 5 DD of the Antenna “Shaiba” for the 435- MHz Band
Data and Stuff for the Antenna: Antenna may be
made from a copper wire in diameter 1.8- 2.2- mm
(11- 14 AWG). Perimeter of the hat (it may be
circular or polygon) is 234- mm. Vertical two wire
line has length 62- mm, distance between the wires
is 20-mm. One of the wire of the line is grounded
another wire is connected to the central core of the
50-Ohm coaxial cable. Braid of the coaxial cable is
grounded.
Like a ground it may be served a copper disk in
diameter not less 320-mm or 3 counterpoises in
length of 168- mm radially connected to a small
disk (base of the antenna) in diameter of 30- 50-
mm .
Sizes of the ground may be decreased if the gap
between the ground and metal auto body is a
small.
For example here is shown a prototype of the
Antenna “Shaiba”- lambda/4 stub Antenna. Figure
6 shows design of the antenna. Figure 7 shows Z
of the lambda/4 stub Antenna. Figure 8 shows DD
of the lambda/4 stub Antenna. . File MMANA for
the lambda/4 stub Antenna (designed for the 435-
MHz Band) may be downloaded from:
Figure 6 Design of the prototype of the Antenna “Shaiba”- lambda/4 stub Antenna

Figure 7 Z of the lambda/4 stub Antenna
Figure 8 DD of the lambda/4 stub Antenna.
It is another low profile antenna for the 435- MHz
Band. It is a half- loop antenna. The antenna has a
gain more than the Antenna “Shaiba” has. DD of
the antenna has ellipsoid shape. Sometimes such
DD is preferred to the circular.
Figure 9 shows the design of the antenna. Figure
10 shows Z of the antenna. Figure 11 shows SWR
of the antenna. Figure 12 shows DD of the
antenna.
File MMANA for the low profile antenna for the 435-
MHz Band may be downloaded from:
Data and Stuff for the Antenna: Antenna may be
made from a copper wire in diameter 2.7- 3.3- mm
(8- 10 AWG). Height of the antenna is 83- mm
length of the antenna is 218- mm. Antenna should
be grounded like the antenna “Shaiba.”
73! UR0GT

Figure 9 Design of the low profile antenna for the 435- MHz Band
Figure 10 Z of the low profile antenna for the 435- MHz Band
Figure 11 SWR of the low profile antenna for the 435- MHz Band

Figure 12 DD of the low profile antenna for the 435- MHz Band
http://www.cqham.ru/forum/
Below there are photos for another one “Shaiba” Antenna.
It is a two band (?) antenna. Credit Line:

ANTENTOP- 01- 2011 # 015 145/435- MHz Vertical Dipole Antenna
www.cqham.ru
It is widely known two band antenna was a little
modified to reach good SWR at the two working
bands- 145 and 435- MHz. Figure 1 shows the
antenna. Figure 2 shows Z of the antenna at 145-
MHz- Band. Figure 3 shows SWR of the antenna
at 145- MHz- Band. Figure 4 shows DD of the
antenna at 145- MHz- Band.
Figure 5 shows X of the antenna at 435- MHz-
Band. Figure 6 shows SWR of the antenna at 435-
MHz- Band. Figure 7 shows DD of the antenna at
435- MHz- Band.
The MMANA model of the 145/435- MHz Vertical
Dipole Antenna may be loaded: http: //
www.antentop.org/015/145_435_UR0GT_015.htm
Figure 1 145/435- MHz Vertical Dipole Antenna

Figure 2 Z of the antenna at 145- MHz- Band
Figure 3 SWR of the antenna at 145- MHz- Band
Figure 4 DD of the antenna at 145- MHz- Band

Figure 5 Z of the antenna at 435- MHz- Band
Figure 6 SWR of the antenna at 435- MHz- Band
Figure 7 DD of the antenna at 435- MHz- Band

ANTENTOP- 01- 2011 # 015 Two Bands 144/430- MHz Antenna
Vladimir Semenov, RU4SJ
It is very simple two bands antenna that do not
require tuning when it made according to the Figure
1. Upper rectangle part of the antenna made of a
copper tube by diameter 6.7- mm. Lower whiskers of
the antenna made of iron road in diameter 5.3- mm.
The antenna is fed by 50- Ohm coaxial cable.
Near the feeding terminals an RF- choke is
installed. This one made traditionally for hams.
Several ferrite rings are placed on the coaxial
cable. There were used two ferrite rings with
permeance 50 and one ring with permeance
2000.
Figure 1 Two Bands 144/430- MHz Antenna
View of the Antenna

ANTENTOP- 01- 2011 # 015 Regenerative HF- Receiver of the Beginner
Radio Amateur
L. Nikolaev, Radio #2, 1958, pp.: 20- 23.
Header of the Article
Below there are description of a simple HF-
Regenerative HF- Receiver for the Beginner Radio
Amateur. Figure 1 shows the schematic of the
receiver, Figure 2 shows the view of the receiver.
The receiver has three the same (Russian) tubes
Front Page of the Radio 1958 # 2
6K4P. Western analog for the tube is: EF93, EF89,
6F31, 6BA6. First tube is aperiodic RF amplifier,
the second one is a regenerative detector and the
third tube is Audio amplifier.
The receiver is built with two aluminum plates. One
plate is the chassis the second one is the front
panel. Figure 3 shows sketch of the plates.
RF choke at the RF amplifier is wound by insulated
wire in diameter of 0.1- 0.12-mm (37- AWG).
Diameter of the form is 10- 15- mm, length of the
winding is 25- 30- mm. It is coiled turn to turn. It
may be used another one RF- choke or just resistor
in 10- 25- kOhm. Figure 2 View of the Receiver

Radio Amateur
Figure 1 Circuit Diagram of the Regenerative Receiver
Figure 3 Mounting Plates of the Receiver
A: Chassis

Radio Amateur
Figure 3 Mounting Plates of the Receiver
B: Front Panel
It is used pluggable inductors at the receiver. The
inductors are mounted on the lamp base from the
old octal tubes. On the receivers plate is mounted
a socket. The needed inductor is inserted to the
socket. Table 1 shows data for the inductors.
To feed the receiver it possible to use any power
supply that can provide 250-V DC (with current
more the 15- mA) for plate and 6.3-V AC (with
current near the 2.0- A) for the heater.
Power supply could be made according to
schematic from the Figure 4.
Transformer has cross-section 16x 20. Winding I
has 1390 (for 127- V, main) +1000 (overall for 220-
V, main) turns of the wire in 0.3- mm diameter (29-
AWG).
Winding II has 3400 turns (250- V, plate) of the wire
in 0.1- mm diameter (38- AWG). Winding III has 74
turns (6.3- V, heater) of the wire in 0.8- mm
diameter (20- AWG).
The receiver works straight away when it mounted
in the right way and the good part are used. It
needs only to tune the inductors to the amateurs’
bands. If inductor (L1) is not provide the right
bands add turns to part 1-2 (if the receiving
frequencies are higher) or remove turns (if the
receiving frequencies are lower) from part 1-2.
Then it needs to get soft turning on the
regeneration. It provides the right numbers of the
turns in part 2- 3 of the L1.

Radio Amateur
Table 1 Data for the Inductors for the HF Receiver
Band,
MHz
Part L1: 1-2 Part L1: 2-3 Form
Diameter,
mm
Wiring NoteNumbers
of turns
Wire
Diameter
Numbers
of turns
Wire
Diameter
28...30 6
0,31- mm
28- AWG
3
0,09- mm
38-AWG
22
Turn to
turn
21...22 7
0,31- mm
28- AWG
3
0,09- mm
38-AWG
22
Turn to
turn
14...14,4 10
0,20- mm
35-AWG
4
0,09- mm
38-AWG
22
Turn to
turn
7,0...7,1 19
0,09- mm
38-AWG
3
0,1- mm
38-AWG
22
Turn to
turn
3,5...3,6 45
0,20- mm
32- AWG
4
0,20- mm
32- AWG
14
Pile
winding,
wide of
the
winding
6 mm
At first is
coiled part 1-
2 of the L1,
above the
inductor is
coiled part 2-
3.
Figure 4 Power Supply for the Regenerative Receiver

ANTENTOP- 01- 2011 # 015 Underground Antennas of the Military Radio
Center and Missile Silo
AlexanderT
On the far 80-s I have seen how it was constructed
an underground antenna. Near a military base
(where I served) in the forest it was flattened two
field. Every field had dimension similar to a football
field. Cables in diameter like my arm were placed
and then buried by a layer of sand in the 50-cm
thick.
I remember that it was used a sea coarse sand with
shelly. The antennas were fenced and security
systems were installed there.
Figure 1 (taken from GOOGLEMAP) shows the
above described antenna. Near the left side you
can see rectangular of the one parts of the
underground antenna. Second part of the antenna
(recently partly under a parking lot) is in the right
side of the picture.
Figure 1 Underground Antenna

4L1FL
I would like to say that I was involved into montage
of the underground HF antenna “Astra.” It was in
1964. The antenna was constructed on the Radio
Receiving Centre that was located in the forest
near Novosibirsk. It was receiving underground
antenna.
I very clearly remember the antenna. It looks like a
menorah. However the candlesticks were near 50-
meters long. The candlesticks were made from a
coaxial cable. I believe it was mix Russian coaxial
cable RK75- 4-11 with unknown to me 50- Ohm
coaxial cable. I remember that along the cable the
plastic insulation and braid were removed on every
2- 3 meter. The part of the cable with removed
braid was sealed by molten polyethylene in the
special mold. The menorah was installed in the
sand mound in to depth of near 50- cm. The sand
mound was 20 meters in width 60- meters in long
and 1- meter in height. Light slope (may be 5- 10
degree) was in the direction of the receiving.
I remember that it was used special sand for the
antenna. The sand looks like a sea coarse sand.
Menorah
Old Russian Receiver KVM
Credit Line: http://oldradio.onego.ru/R/kv_m.htm

The antenna worked up to 12 (or 18)- MHz (as I
remember). Crew of radio engineers from Moscow
came to tune the antenna. It was very classified
antenna. No one was at the site when the
engineers tuned the antenna.
It was not only one underground antenna at the
Receiving Centre. Underground antennas for Long
Wave were used there. There were ferrite
antennas. However I did not seen the antennas
(because there were also classified). My
commander, lieutenant, give me a write- off
receiver KVM when I ended my serve at the Radio
Centre. I did the first step to the Amateur Radio
with the receiver. I never read about the antenna
“Astra” somewhere. It looks like the antenna is still
classified.
CMGnic
(Note I. G.: CMGnic made some pictures at old
stripped underground silo of intercontinental
ballistic missile. The pictures show remains of the
real underground antenna named “Bruschatka.”)
Figure 2 shows the remains of the antenna
“Bruschatka.” Such antenna is almost at any
underground silo of intercontinental ballistic
missile. Somebody told me that the antenna
belongs to Russian System “Perimeter.” I do not
know…
Figure 3 shows cap of the antenna. Contact
plates are under the cap. Figure 4 shows an
underground gallery to the antenna with some
strange metallic lustre mastic.
Figure 5 shows big cap of the antenna. Figure 6
shows remains of the well of the antenna. Figure 7
shows another view of the destroyed antenna.
Figure 8 shows signal cables in the underground
gallery to the antenna “Bruschatka.”
Credit Line to the Figure 2- 8:
http://my.mail.ru/mail/rw4cmg/
System “Perimeter’” (or Dead Hand):
http://en.wikipedia.org/wiki/Dead_Hand_(nuclear_war)
Figure 2 Antenna “Bruschatka”
Figure 3 Cap of the Antenna “Bruschatka”
Figure 3- bis Cap of the Antenna “Bruschatka”

Figure 4 Underground gallery to the antenna with
some strange metallic lustre mastic
Figure 6 Remains of the well of the Antenna
“Bruschatka”
Figure 5 Big cap of the Antenna “Bruschatka”

Figure 7 Another view of the destroyed Antenna “Bruschatka”
Figure 8 Signal cables in the underground gallery to the antenna “Bruschatka”

ANTENTOP- 01- 2011, # 015 Wish You Were There... Hamvention-
2011 and FDIM- 2011
TICKET for HAMVEVTION- 2011

ANTENTOP- 01- 2011, # 015 Wish You Were There... Hamvention-
2011 and FDIM- 2011
LETTER with HAMVENTION- 2011 TICKET
SIGNED TICKET
FDIM- 2011 TICKET

ANTENTOP- 01- 2011, # 015 Stub Matched Antenna and Method the
Feeding Same

Feeding Same
ww.antentop.org Page-91

Feeding Same

ANTENTOP- 01- 2011, # 015 Sound Powered Radio Transmitter

ANTENTOP is FREE e- magazine, made in PDF,
devoted to antennas and amateur radio. Everyone
may share his experience with others hams on the
pages. Your opinions and articles are published
without any changes, as I know, every your word has
the mean.
A little note, I am not a native English, so, of
course, there are some sentence and grammatical
mistakes there… Please, be indulgent!
Publishing: If you have something for share with
your friends, and if you want to do it FREE, just send
me an email. Also, if you want to offer for publishing
any stuff from your website, you are welcome!
Copyright: Here, at ANTENTOP, we just follow
traditions of FREE flow of information in our great
radio hobby around the world. A whole issue of
ANTENTOP may be photocopied, printed, pasted
onto websites. We don't want to control this process.
It comes from all of us, and thus it belongs to all of
us. This doesn't mean that there are no copyrights.
There is! Any work is copyrighted by the author. All
rights to a particular work are reserved by the author.
Copyright Note: Dear friends, please, note, I
respect Copyright. Always, when I want to use some
stuff for ANTENTOP, I ask owners about it. But…
sometimes my efforts are failed. I have some very
interesting stuff from closed websites, but I can not
go to touch with their owners… as well as I have no
response on some my emails from some owners.
I do not know, why the owners do not response me.
Are they still alive? Do their companies are a
bankrupt? Or do they move anywhere? Where they
are in the end?
I have a big collection of pictures, I have got the pictures
in others way, from FREE websites, from commercial
CDs, intended for FREE using, and so on... I use to the
pictures (and seldom, some stuff from closed websites)
in ANTENTOP. If the owners still are alive and have the
right, please, contact with me, I immediately remove any
Copyright stuff, or, necessary references will be made
there.
Business Advertising: ANTENTOP is not a
commercial magazine. Authors and I (Igor Grigorov,
the editor of the magazine) do not receive any profit from
the issue. But off course, I do not mention from
commercial ads in ANTENTOP. It allows me to do the
magazine in most great way, allows to pay some money
for authors to compensate their hard work. I have lots
interesting stuff in Russian, and owners of the stuff
agree to publish the stuff in ANTENTOP… but I have no
enough time to translate the interesting stuff in English,
however I may pay money to translators, and they will do
this work, and we will see lots interesting articles there.
So, if you want to put a commercial advertisement in
ANTENTOP, please contact with me. A commercial
advertisement will do ANTENTOP even greater
interesting and various! I hope, readers do not mention
against such commercial ads.
And, of course, tradition approach to ANY stuff of the
magazine:
BEWARE:
All the information you find at AntenTop website and
any hard (printed) copy of the AnTentop Publications
are only for educational and/or private use! I and/or
authors of the AntenTop e- magazine are not
responsible for everything including disasters/deaths
coming from the usage of the data/info given at
AntenTop website/hard (printed) copy of the
magazine.
You use all these information of your own
risk.
ANTENTOP- 01- 2011, # 015

Antentop 2011 01

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