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Gayan Sameera, profile picture
Uploaded byGayan Sameera
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2m 144 mhz 146mhz receiver

The document details a homemade 2m receiver using MC3357/LA1186 for SWL and ham operators, highlighting its excellent sensitivity and stable performance on 144-146 MHz frequencies. It includes technical specifications, part lists, and assembly information aimed at guiding users through building and operating the receiver. The author invites feedback and photo submissions from users via email.

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2m 144MHZ 146MHZ RECEIVER 4S6GGS Her I am use MC3357 / LA1186 in this 2m Receiver This experiment was done when I was a SWL lesson 145.625MHz Repeater / 145.650MHz Repeater 59 Signal Repot With my Home brew ground plan Antenna 10 feet height Excellent Sensitivity without preamp . Local osc are very stable when I on Rx 2min in drift +- 50khz and get very stable in 24 hrs www.4s5gs.gayan@gmail.com
2m 144MHZ - 146MHZ RECEIVER Her I am use MC3357 / LA1186 in this 2m Receiver This experiment was done when I was a SWL lesson 145.625MHz Repeater / 145.650MHz Repeater 59 Signal Repot With my Home brew ground plan Antenna 10 feet height Excellent Sensitivity without preamp . Local osc are very stable when I on Rx 2min in drift +- 50 kHz and get very stable in 24 hrs. This Receiver good perform for SWL / Ham operators / Monitor 2m band. MC3357 DESCRIPTION Includes Oscillator, Mixer, Limiting Amplifier, Quadrature Discriminator, Active Filter, Squelch, Scan Control, and Mute Switch. • Excellent Sensitivity: Input Limiting Voltage – (– 3.0 dB) = 5.0 mV (Typical) • Low Number of External Parts Required LA1186 Features and Functions • Contains RF amplifier, MIX, OSC, AFC diode. • Operating voltage: 1.8 to 8.0V. • Improvement in cross modulation characteristic due to the use of double-balanced MIX. • Improvement in strong input characteristic. • Less spurious radiation from local OSC. • TV (1 to 12 channel) receive capability. 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER 2m RECEIVER SCHEMATIC DIAGRAM 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER Part list Part Value R1 10 Part Value D1 1N4004 R2 1k CX1 0.1uF D2 1N4148 R3 22k CX2 0.1uF D3 1N4148 R4 10k CX4 0.001uF D4 1N4148 R5 2.2k CX5 0.1uF D5 1N4148 R6 220k CX6 0.01uF *** D6 1N4148 R7 10k CX7 0.22uF IC1 LM386N R8 10k CX8 0.68uF IC2 MC3357 R9 1.5k CX9 470pF IC3 LA1186 R12 100k CX10 470pF IC4 LM7805 R13 1k CX11 0.1uF IC5 LM7805 R14 33k CX12 22pF L1 1mH *** R15 47k CX13 0.1uF L2 20SWG 3T Dia 7.5 mm R16 2k CX14 20pF L3 20SWG 3T Dia 7.5 mm R17 2k CX15 10pF LED1 R18 22 CX16 0.1uF Q1 10.245MHz crystal R19 22 CX17 0.1uF QF2 10.7MHz Filter R20 100k CX18 120pF SP1 8R 1W Sony Sp R21 150k CX19 50pF T1 BC547 R22 2.2k CX20 5pF T2 BC547 VR1 10k CX21 5pF T3 BC547 VR2 47k CX22 0.001uF TR1 455KHz IF IFT VR3 20k CX23 0.001uF TR2 10.7MHz IF IFT VR4 10k CX24 5pF CX26 30pF CX27 0.001uF C1 100uF CX28 30pF C2 220uF CX29 0.001uF C3 10uF CX30 100pF C4 20pF CX31 0.001uF C5 1uF CX32 0.01uF C6 0.47uF CX33 0.001uF C7 10uF CX34 0.001uF C8 220uF CX35 0.1uF C9 20pF C10 10uF 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER PCB side Size . H50.8mm / 103.33mm 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER Component side Size . H50.8mm / 103.33mm 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER 10.7MHz Filter Preamp Board Part list C1 10n R3 * C2 10n R4 1k C3 10n R5 100 C4 4.7n R6 10k C5 10n R7 47k QF1 10M7 T1 C1923 R1 680 R2 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER Part list Assembly variant: Part Value C1 10n R1 56 C3 10n R2 470 C4 10n R5 470 C5 10n R6 220k QF1 10M7 T1 C1923 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER 10.7MHz P.PA Board PCB H24.08mm / W 19.17mm VCC LA MC GND 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER This Receiver good perform for SWL / Ham operators / Monitor 2m band. Very stable LOCAL VCO. First on the Rx Normal power on LED light up half (the power indicator ) then Tune the our Repeater 145.625MHz in lesion the signal wait for 1-5min fine tune the Rx then ok now can use contuses 24hour …………….Try it and sent me a Photo and result via E mail 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com
2m 144MHZ - 146MHZ RECEIVER Normal power on LED light up half / the power indicator 145.625 - 600 Repeater Signal Receive LED light up full. S meter run 4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com