27 MHz Oscillator (CB24983E)

This tunnel diode oscillator was found in July 1986, Radio Electronics magazine. Note the low supply voltage.

Automatic Voltage Selector (CB15346E)
This circuit was found in Motorola's Linear Interface ICs of 1993. The integrated circuit used is not...
Voltage to Frequency Converter (CB13647E)
This configuration was found in a publication for radio amateurs in 1979. The two integrated...
Ohmmeter (CB5933E)
This circuit makes use of a 741 single source operational amplifier to measure resistors on a...