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 circuit was found in a Popular Electronics from the 90s. The frequency range generated...
Found in a 80s American documentation, this circuit pulses a lamp for optical relay tests. The...
This is the basic configuration of a voltage comparator with the Norton LM3900 amplifier. The...