I second the nay to the "a logic design error in an early (1960s) electronic
keyer" comment.
I had a Heathkit keyer on which I learned iambic, and it was all discrete
logic gates and RC circuits. No ICs. It did exactly what the schematic said
it would do. No error there. It has to have been mode-B, because I never
could make mode-A work, and mode-B seems very natural.
Before I knew to turn my K2 to mode-B, I was certain there was something
wrong with it, cause I couldn't send ANYTHING right.
Sorry I don't remember the model number (I sold it right after I got my K2
on eBay), nor have the schematics, but I built the thing, used it for 25
years, and know it was just a box of 74xx gates.
Dan / WG4S / K2 #2456
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