This circuit was found in a Radio Electronics from February 1966. With it it is possible to trace the curve of a tunnel diode visualizing it on an oscilloscope.
This 13.6 V power supply with 8 A output was suggested by Texas Instruments in the documentation of...
This sophisticated filter for audio signals was found in Radio Electronics magazine. The...
This circuit was found in a 1977s English magazine. The SCR can be the TIC106 and the transistor the...