Short Wave Converter (T987E)

The conversion range of this circuit depends on the coil. The circuit uses two tubes, and the power supply is not provided.

Two Transistors MW Receiver (CB13992E)
This circuit originally uses germanium transistors having been obtained in a publication in 1960....
Preamplifier and Vox II (CB19993E)
This circuit works both as a preamplifier and activates a relay when speaking in front of the...
Medium and short-wave press selector (CB22021E)
This circuit is intended for amplification of signals in the range of 1.8 to 20 MHz. The...