Volume expander amplifier (T364E)

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

50 mA composite operational amplifier (CB25184E)
This complementary circuit increases the output power of an operational amplifier. Outputs with...
Rectangular Generator LM3909N (CB4558E)
This circuit was obtained from a 1978 Practical Wireless. It generates a low frequency, low...
Non-inverting AC amplifier with LM741 (CB25922E)
We found this amplifier with 50 MΩ input resistance in the May 1989 Radio Electronics magazine. The...