3-tube receiver (T1602E)

Found in a 1949 Radio Electronics, this circuit employs vacuum tubes of the time. Power supply not provided.

Lamp Control (CB21676E)
This circuit that also serves to control LEDs and other loads is from a 1960 publication. The...
FET RF mixer (CB20761E)
This circuit was found in a documentation from the 70s. The FET admits current equivalents and the...
4 Transistor Active Antenna (CB4752E)
The operating range of this circuit is 10 kHz 30 MHz. Equivalent transistors can be used. The...