Matching antenna (CB7458E)

The coil and sockets of this circuit found in a QST depend on the frequency band that is intended to be tuned.

Crystal Timebase (CB6521E)
This timebase was found in a European 1980s documentation. The circuit uses well-known components...
Single-source, emitter-coupled amplifier (CB24023E)
This circuit was found in a Radio Electronics issue from May 1970. The transistors are...
Flasher with control (CB9786E)
This flasher or light pulsator can be used in an ordinary flashlight. The circuit can be adapted to...