This circuit for the 1750 m band was published in the September 1989 Radio Electronics magazine. The range depends on the antenna system and receiver used.
Found in a RCA publication from the 1970s, this circuit is intended for the production of pulse...
In this circuit, the LED Will blink in a presence of na áudio signal in the input. Gain is...
This oscillator version is from an RCA documentation from the 1970s. Transistors support modern...