6SN7 Preamplifier (T1105E)

This preamp circuit has a typical configuration as found in a 1946 publication. Supply voltages are indicated.

CMOS Crystal Oscillator (CB24939E)
This XTAL oscillator was found in the January 1986 issue of Radio Electronics magazine. Any gate...
13.6 V x 1A Power Supply (CB13633E)
This circuit is from a documentation for 1976 radio amateurs. We can implement this circuit with...
Audio Selective Filter (CB24272E)
This sophisticated filter for audio signals was found in Radio Electronics magazine. The...