Volume expander amplifier (T364E)

This circuit was found in the 1961 RCA tube manual. The circuit includes a power supply stage.

10 W amplifier (CB6988E)
This amplifier was obtained in an Electronics Now based on the LM1875. The circuit must be powered...
Test your Nerves (CB12709E)
The Nerve-test is a traditional electronic game. The player must pass a metal ring through a...
Transformerless Source (CB13072E)
A very simple and useful type of power supply is one that does not use the transformer. Although this...