10-Step Sine Generator (CB24472E)

This CMOS generator with the 4018 IC was found in a November 1976 Radio Electronics magazine. It uses a 741 op-amp as the audio amplifier.

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Signal Identifier (CB6497E)
This circuit identifies the polarity of DC signals and if the signal is AC. The circuit is from...
Tunable UHF Oscillator (CB21144E)
Found in American documentation from the 1990s, this circuit generates signals in the 350 to 500...
1 MHz FET Oscillator (CB6148E)
This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time...