This 80's circuit uses a germanium transistor like the AC121. The circuit has an output transformer of the type found on many transistor radios of the time.
September 2016 - It can be obtained by Mouser Electronics the new dual analog switches TS5A22364 /...
With this circuit, of a 1977 Radio Shack documentation, it is possible to demonstrate the...
This circuit was obtained from an 80's Electronic Engineering. The circuit detects ice formation...