6SN7 Preamplifier (T1105E)

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

LM741 Buffered Peak Detector (CB25219E)
This circuit with the LM741 operational amplifier can be applied to other operational amplifiers. We...
Remote Control Test (CB4376E)
This circuit came out in the American magazine Electronics Now, in a 1993 issue. The magazine no...
12 V x 30 mA power supply (CB13958E)
This small source was found in an English documentation from 1970. The diodes can be 1N4002 for...