6SN7 Preamplifier (T1105E)

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

60 Hz Receiver (CB24280E)
This ultra-low frequency receiver circuit was published in the August 1973 issue of Radio...
Active antenna using IC (CB8924E)
In this circuit of the 1980s, the T1 transformer has 30 turns of 28 primary wire and the secondary...
DC-AC Converter (CB1239E)
Published in 1988 in Hands On Electronics, this circuit converts the 12 V of a battery into 120 V AC...