Power supply for tubes (T1529E)

This power supply was found in a Popular Electronics from October 1956. The circuit has good current and voltage suitable for most tube circuits.

Magnetic Microphone Preamplifier (CB25694E)
This circuit was found in the March 1994 issue of Electronics Now magazine. The circuit uses a...
Transient Suppression on SCRs (CB6571E)
This 1965 General Electric circuit uses a "Thyrector" that is a suppressor of the time. The...
Microcomputer Shield (CB4309E)
Originally in 1986, this circuit was developed to operate with microcomputers of the time like the...