6SN7 Preamplifier (T1105E)

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

High Power DC Flasher (CB5212E)
This circuit of an old publication makes use of SCRs that admit modern equivalents. The frequency...
50W Booster (CB23944E)
This PNP transistor power stage was found in the May 1969 issue of Radio Electronics magazine. The circuit...
Source Follower FET stage (CB4687E)
In the figure we have an amplification stage with FET in the source follower configuration. The circuit is...