This amplifier for signals in the 2 m range that corresponds to 150 MHz was found in an American documentation from the 1980s. The FET can be a BF245.
This circuit was found in a 1977 American manual. The integrated circuit is from the time....
This circuit uses the SQ3524, a switching integrated circuit. The circuit was found in the April...
We found this circuit in documentation from the 90s. Instead of a voltmeter, you can use the...