5V x 10 A regulafot (CB9960E)

This configuration appears elsewhere on this site. We found it in a Motorola manual from the 70s. The transistor must have an excellent heat sink.

Regenerative Short Wave Receiver (CB441)
For the 7 to 10 MHz band L1 is formed by 3 turns of 22 to 28 AWG wire in a ferrite core 15 to 20...
1 to 999 Minutes Programmable Timer (CB4436E)
We found this interesting timer circuit or CMOS timer in a 1988 publication. The circuit is still...
Mixer 741 (CB8987E)
This audio mixer was found in an old American documentation. The potentiometers are 1M and the...