1. STUDIES IN MEDIA TECHNOLOGY TECH 1002 RADIO PROJECT 2010 Tutor Andrew Clay Sam Fawcett P09279675 Steve Ferris P09249139 Rohit Gokani P09249813

2. STUDIES IN MEDIA TECHNOLOGY TECH 1002 Objectives Building an AM radio and amplifier and then testing it to hear what radio stations can be received. The team members were Steve Ferris, Sam Fawcett and Rohit Gokani. Location The radio was built in an electronics lab at De Montfort University, Leicester. Leicester De Montfort University The nearest transmitter to De Montfort University is approximately one mile based at Freemans Common Leicester. NGR SK589027 Transmitter

3. STUDIES IN MEDIA TECHNOLOGY TECH 1002 Amplitude Modulation A radio signal by itself (one carrying no information) is called a “Carrier Wave”. The process of adding information to a “Carrier wave” is called “Modulation”. Simple form of modulation: Turning the signal on and off i.e. Morse code. Another form of modulation: Varying the instantaneous power- Amplitude modulation (AM). This is capable of carrying speech and music. The AM radio waves range from 535-1705 KHz or thousands of cycles per second so theoretically anything transmitted within this range with in the Leicester area should be detectable on the radio constructed.

4. STUDIES IN MEDIA TECHNOLOGY TECH 1002 Tuning If one was standing next to the NGR SK589027 transmitter an aerial would not be needed because the university is roughly a mile away an aerial had to be made to receive the e AM waves from the transmitter. 100 millimetre Ferrite Rod The aerial was constructed using a ferrite rod which had enamelled copper wire coiled around it 55 times and sealed down with insulating tape. The ends of the wire were scraped before being soldered to the circuit board. 0.315mm diameter (30s.w.g.) enamelled copper wire 05-215 Insulating tape. What is an aerial An aerial is a transducer which serves the purpose of the conversion of electromagnetic waves to electric current. In case of this radio project the coiled wire will receive the AM waves and induce an alternating current and a corresponding voltage at where it is attached on the circuit board.