Modulator Amplifier (V1574E)

This circuit is from a 1938 tube manual. Transformers are the critical components. Component values are given.

Function generator (CB6994E)
This circuit was found in 1980s Radio Electronics. The circuit includes the power supply. The...
Windscreen Wiper Interval timer (CB6043E)
This circuit was found in a former Popular Electronics. The timing is set on the potentiometer and the...
Battery Status Test (CB4581E)
This circuit has appeared on our site several times as a battery status monitor. In this...