Touch controlled voltage source (CB22141E)

We found this circuit in an old English documentation. Transistors support modern equivalents.

Transistorized receiver (CB22218E)
We found this circuit in a documentation from the 50s. It is based on CK722 germanium transistors. The...
60's crystal radio (CB22171E)
Found in an English publication from the 1960s, this circuit uses period components, including the...
TTL Oscillator (CB6150E)
This oscillator can generate 2 to 10 MHz signals and was found in an American 1980s documentation. The...