Radio Frequency
UHF indicator - wavemeter
UHF indicator or wavemeter is some kind of device that measures frequencies and determines LC circuit frequecy resonance . This device does not need to radiate.
The oscillator is build with T1 and T2 (2 x BF494) and can be adjusted with C1 and Lx. The Lx coil is connected outsite of the metal box and [...]
VHF AM converter
There are many people who want to listen whats going on in VHF 108 - 132 MHz. This vhf am converter converts a band between 106 and 150 MHz, so you can listen even 2m radio amateurs (144Mhz).
This vhf am converter is build with an vhf amplifier, one mixer and oscillator. After the input signal [...]
