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Total 67 documents matching your query.

21. Re: [CQ-Contest] Contesting and the FT8 Revolution (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Fri, 2 Jul 2021 18:01:58 -0700
I've gone through this stuff in detail with someone who knows far more about digital signal processing than either of us, and everything I said is possible with the exception that I will acknowledge
/archives//html/CQ-Contest/2021-07/msg00004.html (13,160 bytes)

22. Re: [CQ-Contest] Contesting and the FT8 Revolution (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sat, 3 Jul 2021 11:57:38 -0700
The answer to your question ... for the umpteenth time ... is that a mode SIMILAR to FT8 or FT4 but with a different interface and some different parameters could and should be an excellent contestin
/archives//html/CQ-Contest/2021-07/msg00013.html (9,736 bytes)

23. Re: [CQ-Contest] Contesting and the FT8 Revolution (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sat, 3 Jul 2021 13:41:30 -0700
I've corresponded directly with Joe Taylor a few times in the recent past on this subject, and I have the deepest respect for his credentials (yes, I'm fully aware that he is a Nobel Prize laureate)
/archives//html/CQ-Contest/2021-07/msg00017.html (13,456 bytes)

24. Re: [CQ-Contest] Contesting and the FT8 Revolution (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sat, 3 Jul 2021 19:00:44 -0700
As best I can tell, the Barrett 4050 uses digital signal processing only on the receive end.  Instead, modes like FT8 and FT4 use various forward error correction techniques to pre-encode the transmi
/archives//html/CQ-Contest/2021-07/msg00023.html (10,915 bytes)

25. Re: [CQ-Contest] Past Prediction of the Future of Contesting. (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sun, 22 Aug 2021 17:27:11 -0700
In my opinion, there isn't anything at all wrong with digital modes.  There is LOTS wrong with mixing digital modes and other modes in the same contest, though. 73, Dave   AB7E There has to be limits
/archives//html/CQ-Contest/2021-08/msg00124.html (10,338 bytes)

26. Re: [CQ-Contest] CQ WW DX SSB Midwest vs East Coast (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Thu, 11 Nov 2021 01:46:02 -0700
Depending upon the band and the quirks of propagation, 200 miles can indeed be significant.   I live about 200 miles south-southeast of Phoenix, Arizona where the bulk of the membership of the contes
/archives//html/CQ-Contest/2021-11/msg00124.html (10,536 bytes)

27. Re: [CQ-Contest] Announcing A New Digital Contest (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Mon, 7 Feb 2022 21:06:54 -0700
I suspect that the distance is scored from midpoint of your grid to the midpoint of the grid you work.  If the logging software handles the contest, you (and it) would know immediately what the point
/archives//html/CQ-Contest/2022-02/msg00018.html (8,488 bytes)

28. Re: [CQ-Contest] ARRL to allow self-spotting in contests (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Thu, 17 Feb 2022 11:45:32 -0700
I wonder if logging programs will now highlight self-spots with a different color in the band map.  That would potentially make the situation you describe even worse, since those spots would probably
/archives//html/CQ-Contest/2022-02/msg00131.html (11,299 bytes)

29. Re: [CQ-Contest] ARRL to allow self-spotting in contests (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Fri, 18 Feb 2022 10:17:03 -0700
The signal processing techniques utilized in FT8 could have been used to enhance the signal-to-noise of normal CW in a way that would have been virtually transparent to the operator.   It's truly a s
/archives//html/CQ-Contest/2022-02/msg00156.html (10,146 bytes)

30. Re: [CQ-Contest] ARRL to allow self-spotting in contests (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Fri, 18 Feb 2022 14:10:33 -0700
When I say it is being "held hostage", I don't mean legally or physically.  I mean that just about everyone ... including you, it seems ... thinks that the protocol used in WSJT-X is the only or best
/archives//html/CQ-Contest/2022-02/msg00167.html (16,725 bytes)

31. Re: [CQ-Contest] ARRL to allow self-spotting in contests (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Fri, 18 Feb 2022 14:12:52 -0700
Wrong.  FT8 has nothing to do with CW, but the signal processing behind it could be used to significantly enhance CW.  Think RTTY with MUCH better S/N and an audible output instead of text on the scr
/archives//html/CQ-Contest/2022-02/msg00168.html (10,874 bytes)

32. Re: [CQ-Contest] ARRL to allow self-spotting in contests (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Fri, 18 Feb 2022 14:21:40 -0700
Here's how: CW transmission from a keyboard macro (just like almost ALL contest exchanges use) but pre-encoded with FEC, LPDC, etc and sent in short bursts (maybe 5 seconds?) with a bandwidth on the
/archives//html/CQ-Contest/2022-02/msg00170.html (13,096 bytes)

33. Re: [CQ-Contest] ARRL to allow self-spotting in contests (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Fri, 18 Feb 2022 14:30:55 -0700
I would have thought the potential benefit would be clear.  It would be a mode almost identical to CW except with a significant improvement in signal-to-noise ratio (roughly 6 to 8 db, I suspect) and
/archives//html/CQ-Contest/2022-02/msg00172.html (18,526 bytes)

34. Re: [CQ-Contest] ARRL to allow self-spotting in contests (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sat, 19 Feb 2022 13:55:31 -0700
I know how FT8 works (I've studied Joe's papers and researched the principles) and I would have no intention of making anything else work like FT8 does.  It's simply too restrictive, particularly for
/archives//html/CQ-Contest/2022-02/msg00177.html (12,279 bytes)

35. Re: [CQ-Contest] ARRL to allow self-spotting in contests (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sat, 19 Feb 2022 14:11:26 -0700
FT8 is terrific for what it was intended.  I've made a couple thousand contacts with it on every band from 160m to 6m.  It happens to be a really crummy contesting mode, though. Think of things this
/archives//html/CQ-Contest/2022-02/msg00180.html (12,087 bytes)

36. Re: [CQ-Contest] ARRL to allow self-spotting in contests (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sat, 19 Feb 2022 20:18:43 -0700
Unless you're using a rig made 30 years ago, any CW signal you receive has already been sliced, diced, unsliced and undiced a LOT more than you apparently realize.  Nobody, including you, "hears" RF
/archives//html/CQ-Contest/2022-02/msg00183.html (15,379 bytes)

37. Re: [CQ-Contest] Mode-X (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sun, 20 Feb 2022 12:38:12 -0700
Thanks for the comment, Ken. I only suggested a CW output to point out that adding FT8-type signal processing techniques could be done in a manner that would be almost transparent to the operator.  Y
/archives//html/CQ-Contest/2022-02/msg00186.html (13,117 bytes)

38. Re: [CQ-Contest] Mode-X (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sun, 20 Feb 2022 23:49:13 -0700
I never suggested any of those things, and they are all totally superfluous to my proposal.  It is an old and completely bogus debating technique to extrapolate somebody's position to the ridiculous,
/archives//html/CQ-Contest/2022-02/msg00189.html (11,678 bytes)

39. Re: [CQ-Contest] Mode-X (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Mon, 21 Feb 2022 10:44:38 -0700
As AB1J pointed out, a better contest mode using FT8-type signal processing techniques isn't required have anything to do with CW. I merely included that in my posts to show that digital processing t
/archives//html/CQ-Contest/2022-02/msg00194.html (13,995 bytes)

40. Re: [CQ-Contest] FOC QP (score: 1)
Author: David Gilbert <ab7echo@gmail.com>
Date: Sat, 26 Mar 2022 19:14:48 -0700
Does FOC official scoring check the signal report?  Some contests don't bother.  Just asking ... I don't know either way. 73, Dave   AB7E 73, de Hans, KĜHB Just a Boy and his Radio __________________
/archives//html/CQ-Contest/2022-03/msg00094.html (10,125 bytes)


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