Standard 1 MHz Oscillator (CB9653E)

We found this circuit in an old American documentation. Transistors can be modern equivalents.

Low Battery Warning (CB24767E)
We found this circuit in November 1983 Radio Electronics magazine. The circuit drives an LED and...
Amplifier and buffer (CB7138E)
Found in a Popular Electronics from the 90s, this circuit can be made with current equivalent...
CB7437E Dummy load for transmitters testing ()
This circuit was found in an American documentation from the 90's. The circuit is intended for...