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.
This MOSFET amplifier operating in the VHF range was found in an old American telecommunications...
We found this circuit in a 1995 publication. It makes use of infrared LEDs of the type existing at...
We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the...