6SN7 Preamplifier (T1105E)

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

Test Circuit for CMRR (CB19725E)
With this circuit, from an old operational datasheet, it is possible to measure the CMRR,...
Motorcycle direction indicator (CB8957E)
Found in a Popular Electronics from the 90s, this circuit can be adapted to use LEDs. The power...
Infrared Video Link (CB14678E)
The circuits shown in the figure, that of an infrared video signal transmitter and receiver, were...