Hello Andreas et al,
Thanks very much for implementing the ability in WSJT-X IMPROVED to see which callers
in the pileup were copying me. This was extremely helpful during the recent H44GJ 6m
EME DXpedition, and will be of great help in any VHF EME DXpeditions utilizing Q65
mode ;-) I do have a few comments and suggestions based on my experience with it
during the DXpedition.
I love the way the flags are shown in on the waterfall and on the Active Stations
List (provided the station has already been decoded). However, what would be more
helpful is not necessarily knowing what stations decoded my signals, but at what
frequency offsets Q65 Signals were detected. In other words, the offset frequencies
for stations who received the red spikes when they decoded my signal. I assume that
this information is already generated by their decoder since their program displays
the red spikes on their waterfall. It may be that there could be some sort of
threshold level set by the user to determine how strong the red spikes have to be
able the general background noise before the flag is set that they received a red
spike, although perhaps it could simply be a simple yes or no indicator. As I
understand it, the red spike indicates that a Q65 signal was detected by recognition
of the time sync signal. The advantage here is that if I were able to identify new
stations who were seeing my Q65 trace (but not necessarily able to decode it), then
they probably would be able to decode me if I replied to them. And I would also
probably be able to decode them (and add them to the Active Stations List) if I
correctly entered their callsign and grid into the DX CALL and GRID boxes. So in this
way, it would be possible to contact stations a couple dB weaker.
I think it probably would be possible to simply use that to trigger your alert
system, just as you currently use the decoded callsign to trigger the alerts.
However, that brings me to another point.
As I have explained previously, I am not in favor of transmitting the actual
callsigns of stations decoded via the internet. This raises the question of whether
the contact ws actually made by the radio or whether people saw information on the
internet and responded based on what they assumed would trigger a contact. For
example, I had a couple stations see that I had decoded them (among others) and
assume that I must have sent them TX3 (R GRID), so they just sent me TX4 (calls and
RRR) even though I had never sent them TX3. The program wants to automatically log
the contact when it decodes TX4 from somebody, regardless of whether I had ever sent
them a TX3 or not, so they could sneak an invalid contact into the log. That is why I
am NOT in favor of sharing callsigns on the internet. Just sharing the offset
frequencies without callsigns would be a step in the right direction, I think, but
the best solution would be not to rely on the internet at all.
If a station receives a red spike from me, the much preferred action would be for
them to send the flag indicating that reception in a radio transmission to me. If I
could see THAT flag on a certain frequency (or on the ASL, if I had already
previously decoded that caller), then I could be assured that the chances were pretty
good that they would decode calls from me if I replied to them. How could this be
done with great sensitivity?
K1JT already showed how this could be done without using any more bits of information
when he developed JT65. His ingenious solution was to use the inverted time sync
information as the only difference between TX1 (calls and grid) and TX2 (calls and
grid plus OOO report). If this were applied here to Q65 Pileup Mode, the standard TX2
(calls and grid) could be changed to indicate TX2 with the added information that
they were receiving me will enough to probably decode if I replied to them with their
callsign and grid.
I appreciate the fact that there might have to be a second decoder pass to check for
messages that might have the flag of the inverse time sync information. But to me,
that would be much more preferable, as the complete contact information could be kept
to the radio signals, and not subject to potential abuse through the internet. It
also means that it would not be necessary to have internet capability at both
stations, although it certainly is helpful to be able to learn what frequency slots
are being used by particular stations.
So, with full appreciation of the great software tools that have been added so far,
and how very helpful they have been shown to be, I suggest that the next step would
be to insure more valid radio contacts by eliminating the display of actual contact
information over the internet. Thanks again for all your great efforts, and your
consideration in the next step to move this very powerful Q65 PILEUP mode forward.
GL and VY 73, Lance
On 9/15/2026 22:16:34, Andreas Junge wrote:
Hi all,
since Lance's expedition was the main reason to implement the "Who heard me"
feature I'll take the opportunity to present a few statistics:
H44GJ was heard by 143 Stations and Lance decoded 195.
Over the last 30 days the site has seen 831 EME call signs.
image.png
I just added a simple "stats/directory" page to the site:
https://livecq.n6nu.org/directory?band=50&seg=50&days=90
<https://livecq.n6nu.org/directory?band=50&seg=50&days=90>
73, Andreas, N6NU
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--
Lance Collister, W7GJ(ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR,
5W0GJ, E6M, TX5K, KH8/W7GJ, V6M, T8GJ, VK9CGJ, VK9XGJ, C21GJ, CP1GJ, S79GJ,
FO/W7GJ, TX7MB, TO7GJ, 3B9GJ, ZD9GJ, H40GJ, H44GJ)
P.O. Box 73
Frenchtown, MT 59834-0073
USA
TEL: (406) 626-5728
QTH: DN27ub
URL: http://www.bigskyspaces.com/w7gj
2m DXCC #11 - 6m DXCC #815 - FFMA #7
Interested in 6m EME? Ask me about subscribing to the new Magic Band EME
email group, or just fill in the request box at the bottom of my web
page (above)!
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