12V x 10A power supply (CB21775E)

This power supply is from a 1977 documentation. The transformers have 11 V secondary with 10 A.

Automatic Transmitter Switch (CB24533E)
This circuit was found in the December 1977 issue of Radio Electronics magazine. The circuit uses...
Tone control (CB12811E)
We obtained this circuit from an old Argentine magazine. The circuit originally uses germanium...
High Input Voltage Regulator (CB13050E)
The 78XX series voltage regulator integrated circuits do not support an input voltage greater than...