"Once upon a time when I was active the Navy-Marine Corps MARS system one
of our members used an LM or 221 (don't remember which) as CW transmitter
by keying the antenna feed line."
If you have an old HP608 sig gen, you can operate 2 meter FM by hooking an ant to it, set it on freq, and speaking loudly into the side of it. Voice vibrations FM the carrier.
Charlie