This circuit was found in an ancient American documentation. With it is possible to double the frequency of a transmitter For the range of 6 meters obtaining 8 W. The circuit makes use of varicap.
The purpose of this circuit, which we find in an old American documentation, is to allow the...
This simple TTL electronic dice uses common anode displays. The circuit is from a March 1975 Radio...
This is the basic version of a gain 20 amplifier with the LM386 providing a few hundred...