5-tube commercial radio (T1619E)

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

AC Motor Reversing Circuit (CB15408E)
We found this configuration in the ON Semiconductor thyristor manual. The triacs depend on the...
Oscillating flyback converter (CB9616E)
This circuit was found in an old documentation. It converts DC voltages and its maximum current...
Window Comparator (CB15267E)
This circuit makes use of comparators and common operational amplifiers, having been found in...