Hi Lance
I understand your reason for wanting blind callers. I had not quite
understood your comment at the end of your first email, but all is now
clear thanks.
We used to use a somewhat similar scheme when Rex VK7MO was touring
Australia with a small dish on 10GHz, The interested stations were
allocated a single tone frequency beforehand, As soon as someone had
decoded Rex, they would transmit a single tone and that would tell Rex who
was copying him, and he would then call them, or call them next. I think
we got up to about 6 stations in the end with this scheme. With GPS locked
systems and CFOM Doppler control it worked well.
73
Charlie DL3WDG
On Tue, 19 Aug 2025 at 07:31, Lance Collister, W7GJ via wsjt-devel <
wsjt-devel@lists.sourceforge.net> wrote:
> Hello Charlie et al,
>
> Yes, I invite "blind callers" for the following two reasons:
>
> 1. I need their calls to be decoded to populate the Q65 PILEUP ACTIVE
> STATIONS LIST ("ASL") and provide the added sensitivity when it comes
> time to participate in a contact exchange with them.
>
> 2. Due to the nature of Faraday Rotation on VHF EME, there may appear to
> be "one way propagation" for extended periods of time. If people waited
> until they copied me before calling, I may have lost the opportunity for
> a complete Faraday Rotation cycle to receive them and add them to the
> ASL. Since many of the callers are horizon-only stations utilizing
> narrow ground gain antenna lobes, there are by nature very limited
> windows during which to complete with them; having them delay the start
> of the contact until they decode me further reduces the available time
> for a contact exchange to take place.
>
> I am sure you can appreciate the huge difference between this type of
> weak signal contact and the essentially instantaneous strong signal
> reciprocal contacts on HF using Fox/Hound or Superfox. On VHF EME, it
> is quite an advantage to be able to determine which station(s) to engage
> in a QSO that might be able to provide a quick reciprocal type of
> contact. Currently, the only way to do this (without resorting to the
> internet to have people report "I am decoding you now", which
> essentially makes the contact invalid) is to try to work through the
> pile of callers, replying to each in turn to see which ones may be
> capable of completing a quick "reciprocal" type of contact with you.
> Thanks to the ASL, it may be that some of the callers to whom you reply
> may actually receive your message, although you won't know it until you
> receive "RRR" from them at some later time. However, the best success
> rates involve choosing the proper QSO partners with which you have the
> highest probability of making a quick reciprocal contact thinning out
> the number of callers.
>
> It struck me that the Q65 PILEUP mode may finally actually provide the
> means to transmit this information! I thought that there might be room
> for this information the way the R report is inserted in TX3. I wonder
> if the program could automatically send a message in place of TX2, but
> similar to TX2 except with some other character (perhaps just a dash
> instead of a space) to indicate that the station copied a yellow spike
> during the receive cycle immediately preceding their transmit cycle.
> This would be in place of TX2, and would revert to the standard TX2 if
> no such yellow spike were received. It would not affect the AUTO
> SEQUENCE of either station (other than the current action upon receipt
> of a TX2 message) but would simply be displayed as a received message.
> But it would be a sign to the DXpedition (or other) station to "please
> select me next because I am copying your trace". I suspect that the
> activation of this feature should be manually turned on by the callers,
> although I guess it wouldn't hurt to have it running all the time
> (unless it would add significant processing to the computers on one or
> both ends).
>
> Perhaps there are significant impediments that would make something like
> this impractical. However, after hours of trying to answer callers one
> at a time who don't copy at the time you tried them, I think it would be
> a tremendous improvement if it were in any way possible!
>
> Thank you for your kind consideration, and for the HUGE advance that Q65
> PILEUP provides. It is already the standard on 6m EME! VY 73, Lance
>
> On 19 Aug 2025 03:58, Jim Brown via wsjt-devel wrote:
> > On 8/18/2025 8:32 PM, Charles Suckling via wsjt-devel wrote:
> >> It seems from your last point that you suffer a lot from 'blind
> >> calling'. This was a real problem during the early days of Superfox
> >> mode, and was overcome by code that prevents a 'hound' from
> >> transmitting at all until they have managed to decode the signal from
> >> the fox.
> >
> > Hi Charles,
> >
> > To understand Lance's request, you must understand his operating
> > conditions. He does 6M moon-bounce Dxpeditions to remote places, which
> > requires very low noise, high power, and big antennas. To minimize his
> > need for power, which translates to minimizing the cost of buying and
> > transporting fuel over oceans, and then to remote locations where
> > there's no noise, he INVITES blind callers. This is a method of
> > operation he devised years ago. He's currently somewhere in the South
> > Pacific, don't remember where.
> >
> > This is his website. https://www.bigskyspaces.com/ Scroll down to
> > see his instructions to callers.
> >
> > I would encourage the development team to take his request seriously
> > and do your best to accommodate it.
> >
> > 73, Jim K9YC
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > wsjt-devel mailing list
> > wsjt-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/wsjt-devel
>
> --
> Lance Collister, W7GJ (ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX,
> 3D2LR, 5W0GJ, E6M, TX5K, KH8/W7GJ, V6M, T8GJ, VK9CGJ, VK9XGJ, C21GJ, CP1GJ,
> S79GJ, TX7MB, TO7GJ, 3B9GJ, ZD9GJ, H40GJ)
> P.O. Box 73
> Frenchtown, MT 59834-0073
> USA
> TEL: (406) 626-5728
> QTH: DN27ub
> URL: http://www.bigskyspaces.com/w7gj
> Skype: lanceW7GJ
> 2m DXCC #11 - 6m DXCC #815 - FFMA #7
>
> Interested in 6m EME? Ask me about subscribing to the Magic Band EME
> email group, or just fill in the request box at the bottom of my web
> page (above)!
>
>
>
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