Reading a discussion on low parts count transmitters, I came across this description, which lacked schematics and build instructions:
Re: PROJECT 14: THE WORLD'S SMALLEST TRANSMITTER
Are y'all forgetting the Fireball transmitter?
Battery, key, dip relay, xtal oscillator at 29.060, antenna.
I think this about as minimalist as anyone could go.
The part that is confusing me is the "dip relay" - a quick search suggests it may be shorthand for a DPDT (double pole, double throw) relay. But in the RF world there's something called "dip tuning" so I'm confused as to whether the terminology is related.
How would one use the above components to make a CW transmitter?