Stereo FM Transmitter (CB8459E)

This circuit was found in a 90s Radio Electronics. The FM encoder or multiplexer is an uncommon component today.

Balanced Modulator (CB4224E)
This circuit was found in a 1980s telecommunications publication. The circuit uses a diode bridge to...
Audio Frequency Meter (CB3877E)
Audio frequencies in the 300 Hz to 30 kHz range can be measured with this circuit. Transistors allow...
100 kHz oscillator (CB10130E)
Indicated to be used as a clock, this circuit was found in old documentation. The operational of...