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.

Microphone Amplifier (CB6204E)
This amplifier was found in a 1969 Mullard documentation. The circuit uses transistors that have as...
CMOS 4001 and 4011 Test (CB19073E)
This circuit was developed to test suspect 4001 and 4011 integrated circuits. The circuit is from...
Missing Pulse Detector (CB13281E)
This traditional detector configuration is from an old publication where the MC1555 is the...