Pete, N4ZR wrote, in part:
"John, K4BAI, made the best practical point - if you are expecting each
number to be composed of 5 elements, then cut numbers using 4 elements
create ambiguity that virtually demands a repeat."
>From my perspective:
I am fine with 5NN because it has become a standard. I am not as comfortable
receiving cut numbers, especially when multiple "cuts" are sent, i.e. NEAT for
9510. I strive for accuracy over rate, so an unexpected cut number typically
generates a repeat request or me hanging around to listen to the next QSO to
verify what I heard.
I find a full 5-element number contains sort of a "checksum". When I know
numbers are coming and I hear two dits, I already know this is a 2, so I listen
for the three dahs to verify my assumption. This is especially helpful during
QRN conditions.
This technique goes out the window when cut numbers are thrown into the mix!
When I hear a "di dah", I am already mentally setup for a "1" and will be
listening for three more dahs. When I don't hear the three dahs, I have to
switch my "decoder" into cut number mode. By that time, it's possible I have
lost the second or third number, especially if there are more than one "cut" in
the sequence.
Other than 5NN, I don't send cut numbers. When I receive them, there's an
increased chance I will need a fill and will ask for it.
73 de Bob - KØRC in MN
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