Receiver for the 40m band LM602 (CB25305E)

This circuit uses an FM IF transformer for tuning. The circuit is from a Radio Electronics magazine from April 1990.

Sine and Cosine Audio Generator (CB21337E)
Found in an old American publication, this circuit is intended for audio experiments. The...
5 V Power Supply (CB25403E)
This battery-powered micropower supply was shown in Radio Electronics magazine in 1991. The...
Model Railroad power supply (CB23728E)
This power supply for model railroad was found in a February 1961 Radio Electronics Magazine. The...