Short Wave Converter (T987E)

The conversion range of this circuit depends on the coil. The circuit uses two tubes, and the power supply is not provided.

Multiplexed AD Converter (CB9023E)
This 8-channel converter was found in a 1970s American documentation. The integrated circuits used are...
Sound Effects Generator (CB17012E)
This circuit is from a 1995 documentation. Several CMOS integrated circuits are used to produce...
Automatic lamp control (CB6847E)
Found in Radio Electronics, this circuit is intended to activate the lighting system of garages...