Archive for the Category


Simple FM Receiver Pocket FM Radio by BF184

Friday, January 8th, 2010

Advertisements


It is a pocket receiver that I built. The idea was to use a simple receiver, but can be used to escape to 3 times viewed. My previous 6-transistor receiver was more complicated and requires 12 volts. This means that 10 AA batteries. I designed and built acircuit board, and built a small aluminum box [...]

VHF Preamplifier 15-20 dB

Monday, August 31st, 2009

Advertisements


The actual preamplifier in this circuit is a practical wideband amplfier that gives about 15 - 20dB of gain from 1.8 MHz through to well over 200 MHz. You will no-doubt replace this circuit for your own favorite amplifier for the band you are interested in. The 2.2mH chokes should have an absolute minimum reactance [...]

Digital FM Stereo Transmitter

Friday, August 28th, 2009

Advertisements


The FM30B is designed using through-hole technology and components and is available only as a do-it-yourself kit, with a 25mW output. It is designed around an RF tight vinyl clad metal enclosure for noise free and interference free operation. Enter the setup mode from the front panel and step through the menu to make all [...]