Dual tube receiver (T1600E)

This receiver employs two dual triode valves. Receiver is from a 1949 Radio Electronics. Power supply not provided.

Square wave generator 709 (CB24193S)
Using the 709 integrated circuit, one of the first operational, this circuit was found in the...
Transistor Variable Voltage Regulator (CB19213E)
This circuit can be used on a 0 to 14 V source with a current of 1 A. The PNP power transistor can be the...
Active Subwoofer for Home Theater (CB17632E)
The circuit presented is quite interesting due to the low-pass filter using the integrated circuit...