Archive for tag: radio circuit

1988 Mazda RX-7 Audio System Circuit Diagram

Audio and Amplifier | By: Diagram mania

The Mazda RX-7 is a sports car produced by the Japanese automaker Mazda from 1978 to 2002. The second generation of Mazda RX-7 (1986 – 1988) base power was the six-port 13B rotary with electronic fuel injection. The following schematic shows the 1988 Mazda RX-7 Audio System Circuit Diagram. The audio system consists of battery, […]

100W RF Amplifier with BLY94

Audio and Amplifier | By: Diagram mania

This is a 100W RF amplifier built based on RF power transistor BLY94. Active components: BLY94 Coaxial cable length : K x Lambda / 4, where K = 0.66 for 50 ohm cable and K = 0.8 for 75 ohm cable. L1 = L6 = 2 turns / 1.5mm / 14mm L2 = L7 = […]

Chrysler PT Cruiser Radio Circuit and Wiring Schematic

RF Radio circuits | By: Diagram mania

Below schematic shows the 2002 Chrysler PT Cruiser Radio Circuit and Wiring Diagram. Herein you will find detailed description of each parts of the radio components system wiring interconnection, such as antenna, instrument cluster, fuse block, power distribution center, instrument cluster, radio, and speaker. The radio waves may pick up electrical disturbances during transmission. They […]

Volkswagen Passat Radio Circuit Diagram w/o Monsoon Radio

RF Radio circuits | By: Diagram mania

Below schematic illustrates the 2001 Volkswagen Passat Radio Circuit Diagram w/o Monsoon Radio. The radio system consists of: antenna amplifier, right rear woofer, right rear tweeter, right front woofer and tweeter, left front woofer and tweeter, left rear tweeter and woofer, CD changer unit, and computer data lines. The woofers produce low audio frequencies while […]

BMW 328i Radio Stereo 6-Speaker System Wiring Diagram

RF Radio circuits | By: Diagram mania

The following schematic shows the 1997 BMW 328i Radio Stereo 6-Speaker System Wiring Diagram. It consists of front power distribution box, CD changer, radio, antenna amplifier AM/FM, speakers, instrument cluster, and ground.

Mini FM Transmitter

RF Radio circuits | By: Diagram mania

This is an mini fm transmitter. I think this is the simplest one. Simple, easy and of course…cheap… The supply voltage is between 1.1 – 3 Volts with power consumption is 1.8 mA at 1.5 Volts. This circuit should be able to cover  30 meters of range max. at 1.5 Volts. Here the PCB Layout: […]

AM Transmitter

RF Radio circuits | By: Diagram mania

This is AM transmitter schematic diagram. The circuit is in two halfs, an audio amplifier and an RF oscillator. The oscillator is built around Q1 and associated components. The tank circuit L1 and VC1 is tunable from about 500kHz to 1600KHz. These components can be used from an old MW radio, if available. Q1 needs […]

9V FM Radio Transmitter

RF Radio circuits | By: Diagram mania

Here the simple and low cost FM transmitter circuit. The frequency range of this FM transmitter should be about 89MHz – 109MHz. Output power is about 9mW at 9V. R1,R6_____________________12K R2,R4_____________________100K R3________________________22K R5________________________1K R7________________________100R Q1________________________BC338 Q2________________________BC548B Microphone JinIn ECM-60P B1 C1___________________10uF/25V C2___________________22n C3___________________10n C4___________________3n3 C5___________________2p7 C6___________________22p C7___________________100uF/16V tuning capacitor_____0-30pF Download the complete explanation of this […]

1.5 Watt FM Transmitter

RF Radio circuits | By: Diagram mania

This is 1.5 Watt FM Transmitter circuit. This circuit should be able to cover 1-2 KM range. Components List R1=220K R2=4.7K R3,R4=10K R5=100ohm C1,C2=4.7uF Electrolytic C3,C4=1nF C5=2-15pF C6=3.3pF Q1=BC547C Q2=2N2219A P1=25K MIC=Electret Condenser Type P1 act as condenser microphone volume level. For FM, coil will be small. Use thin gauge enamel magnet wire. the diameter […]

15W FM RF Amplifier with 2SC2539

Audio and Amplifier | By: Diagram mania

This is a FM RF amplifier which build based on RF Power Transistor 2SC2539. 2SC2539 is a silicon NPN epitaxial planar type transistor designed for RF power amplifiers in VHF band mobile radio applications. circuit diagram: L1: 2T Coil diameter:4mm L2: in series 6pcs Toroidal ring L3: 4T Coil diameter:10mm L1: 3T Coil diameter:10mm FEATURES […]