This 1950s audio amplifier uses output tubes of type 1625 in its output stage. The Class B circuit provides a few watts of power and uses transformers that are not readily available today.
This circuit was found in a 1967 US documentation. The circuit applies to modern general purpose...
In the figure we have the astable configuration for the 4093 that serves as a clock for...
The purpose of this circuit is to test power supplies functioning as a variable load that can...