Found in an Electronic Design from the 90s, this circuit uses components from that time and can supply voltages of 5 V with current up to 100 mA.
Below are two frequency filters for receivers using crystals. The crystals must have the frequency of...
We found this circuit in a Radio Electronics from December 1963. The circuit combines valves and...
This circuit published in the November 1964 Radio Electronics magazine powers a light bulb but can...