Phase Detector 7400 (CB22427E)

This circuit detects the phase of a signal. As it is a TTL circuit, it must be powered by a voltage of 5 V.

Crystal Calibrator (CB21783E)
This circuit generates a 1 MHz signal for general equipment calibration. The circuit is from an...
FET Preamplifier (CB404)
This simple preamplifier presents a high input impedance and can be used with microphones, piezo...
Two meter amplifier (CB8980E)
This circuit for the two-meter band of radio amateurs was found in 1980s documentation....