Oddly enough,
I was at a "deceased sale" of a local Ham operator some years back and I picked up one of his radio sets for little more than a "song".
This thing was an AM 80m CW transmitter and it had the be all and end all of radio gear: the mercury-arc rectifier.
I was working with the guy at the time he built the radio (he was my Elmer) when he was teaching me Morse Code, you just can't replicate that same eerie green glow with LED's.
It used to "twitter" (yeah, we started that too)
with the key being pressed and released.
