This pocket-sized VHF receiver was found in Radio Electronics magazine from January 1961. It uses a transistor and tunes to the 11-meter band, considered VHF at the time.
This circuit, which can function as a small transmitter, was found in the July 1978 issue of Radio...
This circuit was found in a Spanish magazine that no more existis, Mundo Electrónico, in a...
Using a transconductance operational amplifier, this circuit was found in July 1983 Radio...