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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1,000 V Voltage Source (CB522E)
This circuit can source up to 1,000 V from a 9 V battery. Output current is very low, some...
5, 6 and 12 V Fixed Power Supply (CB18643E)
This power supply uses integrated voltage regulators for 1 A of the 78xx series. The output...
Loop Antenna Tuner (CB26263E)
This circuit appeared in Amateur Radio Today in an issue and was found in a 1995 issue. The...