Posted on Thursday, August 25, 2011 • Category:
FM Transmitters
This miniature transmitter is easy to construct and it's transmissions can be picked up on any standard FM receiver. It has a range of up to 1/4 of a mile or more. It is great for room monitoring, baby listening, nature research, etc. L1 is 8 to 10 turns of 22 gauge hookup wire close wound around a non-conductive 1/4 inch diameter form, such as a pencil. C4 is a small, screw-adjustable, trimmer capacitor. Set your FM receiver for a clear, blank space in the lower end of the band. Then, with a non-conductive tool, adjust this capacitor for the clearest reception. A little experimenting and patience may be in order. Most of the parts' values are not critical, so you can try adjusting them to see what happens.
200mW FM Transmitter SAA1057 PLL Synthesized FM Transmitter BA1404 HI-FI Stereo FM Transmitter - Special Edition Kit Wireless PLL Stereo FM TX with LCD Simple Audio FM Transmitter FM Broadcast Transmitter 1 Watt Universal RF Amplifier FM Transmitter with Mic & Line Input BH1417 PLL Stereo FM Transmitter 5 Watts FM RF Amplifier Circuit-Zone.com © 2007-2024. All Rights Reserved.