Canadian_Guy_NS
Canadian_Guy_NS t1_iuf63au wrote
Reply to comment by the_original_cabbey 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
Yes, pretty much. If you are on a duplex circuit, the receiver will throw a "dah" for each word received, and if they missed something in that word, will throw a "ditdit", and the sender will resend the last word.
When you are doing this style, you can quickly figure out how fast the other guy is.
Canadian_Guy_NS t1_iuf5uah wrote
Reply to comment by kasteen 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
arg, forgot the K! lol (dahditdah)
Canadian_Guy_NS t1_iubrdlo wrote
Reply to 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
I was a commercial radio operator. I qualified sending and receiving international morse at 20 words per minute.
Later, in the Military, I knew people who could receive at 60+ wpm. At those speeds you can hear whole words.
So, at the slower speeds, you have an element of time that is 1 unit. That is the length of a "dit", a "dah" is 3 units long. The space between the dits and dahs of a character is 1 unit long. The space between characters is 3 units long, or the space of a dah. As you get faster, the timing should stay the same, but what happens once you get proficient, the dits get shorter, and the dahs just become slightly longer dits, say 1.5x the length of a dit. Then you make the spaces within a character as short as possible, and shorten up the spaces between characters as well, but keep them slightly longer.
A good operator has a nice rhythm, and will work with the receiving operator up to that operator's most efficient speed. It is the rhythm that makes it all work. Think of it as like someone's speech cadence.
Also, most modern movies just have nonsense, and you don't hear the whole message because it would take too long.
dah ditditditdit ditdah dahkit ditditdit, ditditdahdit dahdahdah ditdahdit, ditdahdit dit ditdah dahditdit ditdahditdahditdah
Canadian_Guy_NS t1_iuf6g89 wrote
Reply to comment by teh_maxh 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
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.