6SN7 Preamplifier (T1105E)

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

Receiver with FET (CB19262E)
This simple receiver with junction FET uses a high impedance magnetic earphone (over 2 k). Power...
Laser Power Supply (CB25203S)
This HeNe laser power supply was found in the March 1989 issue of Radio Electronics magazine. This...
86 dB Gain Stage (CB6118E)
This circuit of the 70's uses transistors of the time. The circuit can amplify signals from 10 Hz...