Volume expander amplifier (T364E)

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

Tone encoder (CB9047E)
This circuit was found in RCA documentation from the 1970s. It was suggested to produce tones for...
Robot controlled by a universal remote control (CB25322E)
This circuit is from a project published in the March 1996 Electronics Now magazine. The author used...
Preamplifier Using the LM358 (MSB076E)
This amplifier uses the LM358, this operational amplifier with excelents characteristics for this...