30W Amplifier (T1544E)

This hi-fi amplifier is from a 1975 RCA tube manual. The critical components are the transformers. Power supply is included.

Temperature to Frequency Converter (CB1433E )
We obtained this circuit in a 1977 technical documentation. The basic component is an integrated...
Relay Amplifier (CB23565E)
This relay drive circuit was found in the July 1958 Radio Electronics magazine. The transistors are of...
RGB to NTSC Converter (CB9415E)
This circuit was found in Radio Electronics from the 90s. The integrated circuit used is not...