Found in a 90s ARRL Handbook, this circuit is intended for the production of signals in the side bands for transmission in SSB.
This circuit, from the 80s, uses an operating system of the time to generate pulses in frequency and...
Found in an Electronics World of 1966 this circuit is intended for use with a microphone as an...
Scratch is the scratching noise that occurs on old, scratched discs and the rumble is the...