Scale Expander for 12V Meter (CB21330E)

This circuit was found in a QST from the 1990s. The circuit expands the scale of a 10V instrument to measure 20V.

100 W Converter (CB6585E)
This DC-DC converter was found in old RCA documentation. The circuit operates at 15 kHz. The...
Nipkow amplifier for disc (CB7241E)
Found in a 1967 documentation, this infrared amplifier is intended for use in a Nipkow disc camera...
1 Hz Oscillator (CB22433E)
This circuit provides a 1 Hz signal given by the capacitor, which can be changed. The gate is TTL...