5-tube commercial radio (T1619E)

This commercial superheterodyne receiver was found in a 1949 Radio Electronics. The circuit uses battery.

Darlington Time Delay Switch (CB25613E)
This relay time delay circuit was found in the October 1993 issue of Electronics Now magazine. The timing...
Low resistance adapter (CB7390E)
Found in a Hands On Electronics from the 80's this circuit allows the reading of low resistances in...
High Speed Digital to Analog Converter (CB5170E)
This 8-bit converter was found in an American 1980s documentation. Motorola components are...