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 small power amplifier makes use of an output transformer given its design time. In fact, the...
In this circuit the output current is limited by R3. For a 300 mA current, R3 must have 12 Ω. For...
This circuit has two stable states such that at each instant only one SCR leads. The state change is...