Hi Ian,
On 7/28/2017 3:37 PM, Ian G0FCT wrote:
I think there is need to handle compound callsigns such as ZA/PA9XYX,
these call signs are common in Region 1.
Of course I know such callsigns are in use. The gist of my question was
to ask "how many"? If you work 500 stations in a Region 1 VHF+ contest,
would there be one or two? Ten? More?
Also, there is a need in Region 1 VHF+ contests to exchange 6 character
locators (e.g. IO91OJ) rather than just 4 character locators. Is this
possible?
That was the main topic of my original message. Did you read it?? See
below.
-- Joe, K1JT
On 28 July 2017 at 20:17, Joe Taylor <j...@princeton.edu
<mailto:j...@princeton.edu>> wrote:
One additional question I should have asked.
If you think FT8 might get appreciable use in Region 1 VHF+
contests, would there be significant need for handling compound
callsigns such as ZA/PA9XYZ, etc.?
-- Joe, K1JT
On 7/28/2017 2:49 PM, Joe Taylor wrote:
Hi Palle (and other VHF+ contest enthusiasts in IARU Regioin 1),
Thanks for the suggestions you posted to wsjt-devel concerning
VHF+ contest exchanges in EU.
I have been sketching out some possible enhanced 75-bit message
structures for FT8 mode aimed (among other things) at supporting
your Region 1 contests.
I would appreciate your comments on the following model contest
QSO structure based roughly on common HF contest practices:
1. CQ G4ABC IO91
2. G4ABC PA9XYZ JO22
3. PA9XYZ 590003 IO91NP
4. G4ABC R 570007 JO22DB
5. PA9XYZ G4ABC RR73
The 4-character locators in messages 1 and 2 are redundant (and
anyway optional). But they cost nothing to include, and they do
provide some useful initial information.
The first two digits of the exchanges in messages 3 and 4 are an
"RS" signal report. Because of the strong forward error
correction in FT8, the first digit will always be "5". The
second digit would be the FT8 S/N reading mapped onto a S1 to S9
scale, using 6 dB per S unit. Something like S1=-24, S2=-18, ...
S9=+24 dB.
Is this an acceptable format for your Region 1 contest
exchanges? Do you think FT8 might be a popular mode for some
use in EU VHF+ contests?
-- 73, Joe, K1JT
On 6/30/2017 7:37 PM, Palle Preben-Hansen, OZ1RH wrote:
FT8 sounds promising. Joe wrote:
/Three extra bits are available in the message payload, with
uses yet to be //defined. We have in mind special message
formats that might be used in //contests, and the like.
Your considered suggestions for use of these bits //are very
welcome!/
/
/
1. VHF contests in Europe needs the full 6 digit WWL
locator like
JO55*ul*. A QTH locator has always had 6 digits (or
more for
microwave), using only 4 digits comes from eme and has
spread to HF
2. Many contests needs a report and a serial number like
59*001* and
even sometimes a 4 digit serial number 59*1001* when
more than 1.000
QSO's has been worked in the contest
3. Sometimes a state/area/membership/IOTA number or
similar free text
needs to be transmitted. Most contest exchanges can be
found in the
N1MM contest program https://n1mm.hamdocs.com
73, Palle, OZ1RH.
www.oz1rh.com <http://www.oz1rh.com> <http://www.oz1rh.com>
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