Simple 1-tube receiver (T960E)

This 1V heater tube circuit was found on a Radio Craft from 1945. The circuit is for medium wave and can be used as a tuner.

Programmable Code Switch (CB18772E)
This circuit is from a 90's publication but uses components that are still common in our market....
450 MHz Preamplifier (CB20270E)
This RF preamplifier for the 450 MHz band was found in an amateur radio documentation from the...
Schmitt Trigger 7400 (CB22419E)
This low hysteresis circuit was obtained from old documentation. The circuit must be powered by a...