This good power amplifier, a few tens of watts, is part of an article in the December 1972 Radio Electronics magazine. The power supply must be symmetrical with at least 3 A.
This filter configuration used in telecommunications uses 4 Jaumnann crystals that are interesting for...
Found in old documentation, this circuit uses an SCR like the TIC106 that must be equipped with a...
This crystal configuration can be made with triggers of any logic. The frequency is given by the...