TwentyninthDigitOfPi t1_iuc9jbn wrote on October 30, 2022 at 6:02 AM

Reply to comment by Canadian_Guy_NS in ELI5: Morse code is made up of dots and dashes. How did telegraph operators keep from losing track of where one letter ended and another began? by copperdomebodhi

How does the sender figure out the receiver's top efficient speed? Is there some sort of "hey slow down" or "go faster if able" code (formal or informal)?

teh_maxh t1_iucndsc wrote on October 30, 2022 at 9:16 AM

QRS to slow down, QRQ to speed up.

TwentyninthDigitOfPi t1_iudwtya wrote on October 30, 2022 at 4:24 PM

Thanks!

Canadian_Guy_NS t1_iuf6g89 wrote on October 30, 2022 at 9:27 PM

absolutely, if I was on a duplex circuit (two freqs) the receiver would send a dah, for every word received correctly, and if he wanted it resent, then send a ditdit.

People are lazy, so didn't really have to use Q codes in that situation, you just increased your send speed until either you weren't comfortable, or the receiver started asking for lots of repeats.