NPN and PNP transistor tester (CB22146E)

This simple transistor tester was found in old English documentation. Suitable for general purpose transistors.

13 V x 5 A power supply (CB17317E)
This conventional source with transistors was found in a 1989 documentation. The transistors must...
Compact Infrared Receiver (CB4897E)
The components used in this 80's circuit are uncommon today. The circuit is intended for...
Outboard Motor Sound (CB11583E)
This circuit produces the sound of a motorcycle or an outboard motor. The frequency is adjusted in the...