6SN7 Preamplifier (T1105E)

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

Frequency Reference (CB11582E)
This oscillator generates a 100 kHz signal given by the crystal. This signal can be a reference for...
LM3900 Voltage Controlled Current Source (CB14211E)
The circuit shown is from National Semiconductor's Linear Applications Handbook. The LM3900 is a...
Basic multivibrator TL071 (CB9222E)
This configuration applies to other operational amplifiers in the same family. The circuit was found...