Delayed Pulse Generator (CB6470E)

This circuit was found in a 1967 documentation. The switch diode is a component of the time and is difficult to find today.

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RF switch using diodes (CB9225E)
This circuit can switch signals in the 3.5 to 30 MHz band. We found it in a QST magazine from the...
Hearing aid amplifier (CB22355E)
We found this circuit in an English documentation from 1995. The components used are common...
RF Sniffer (CB6236E)
This is a field strength meter found in an 80's Hands On. The circuit operates at frequencies up to 500...