This amplifier was found in a 1957 Rayrtheon documentation. The circuit can be fitted with a BC558 transistor. Driver and output transformers can be obtained from unused transistor radios.
This is the modulator circuit for the remote-control transmitter presented in CIR11801. The...
This circuit was found in an English documentation from 1969. The transistors are of the time,...
This circuit also makes use of a field effect transistor (JFET) which can be the BF245 and has an...