[RTTY] New contesting PSK faster than RTTY

[rojomn]

I bet with the number of users here that interest would pick up quickly but
I am told there is no easy way to switch modes quickly to this PSK63. Until
that interface is available I doubt your effort would be utilized as in a
contest speed of choice is paramount.
OTOH if the dll has the proper interface then I bet may would use it.
Unfortunately I assume it would take some more work on Warbler to present
the new mode?

> -----Original Message-----
> From: rtty-bounces at contesting.com [mailto:rtty-bounces at contesting.com]On
> Behalf Of Dave Bernstein
> Sent: Sunday, May 04, 2003 10:02 PM
> To: rtty at contesting.com; dxlab at yahoogroups.com
> Cc: aa5au at bellsouth.net; 'Richard Ferch'
> Subject: RE: [RTTY] New contesting PSK faster than RTTY
>
>
> WinWarbler utilizes PSKCORE.DLL as its PSK engine. If there is serious
> interest in exploring PSK63, I can quickly release a version that
> compensates for the  "freq/2" defect mentioned below. Let me know...
>
>     73,
>
>        Dave, AA6YQ
>
>
> -----Original Message-----
> From: rtty-bounces at contesting.com [mailto:rtty-bounces at contesting.com]
> On Behalf Of Richard Ferch
> Sent: Sunday, May 04, 2003 9:57 PM
> To: rtty at contesting.com
> Cc: aa5au at bellsouth.net
> Subject: Re: [RTTY] New contesting PSK faster than RTTY
>
>
> On Sun May 4 20:07:23 EDT 2003, Don Hill AA5AU said:
>
> > I'd be willing to try it, but it's still going to be AFSK.  Where do
> > we get the software?
> >
> > AFSK - if I wanted to send audio to my radio, I'd go hunt for my
> > microphone...
> >
> > RTTY Forever,
> > Don AA5AU
>
> Hi Don,
>
> It's basically the same as PSK31 except at twice the speed (and
> therefore twice the bandwidth). So far, the only code I have seen for it
> is in KH6TY's experimental version of the PSKCore.dll file at
> http://www.qsl.net/kh6ty/psk63/ - the actual file is at
> http://www.qsl.net/kh6ty/psk63/psk63core.zip .
>
> In addition to the dll itself, you need a PSK program that uses the
> PSKCore dll. I could be wrong, but I don't think WriteLog is one. Those
> that I am aware of includeWinPSK (http://www.qsl.net/ae4jy/winpsk.htm),
> WinPSKse
> (http://www.winpskse.com/) and Zakanaka
> (http://www.qsl.net/kc4elo/oldfiles.htm) plus several others (I can give
> more links if anyone is interested). Many of these programs do not have
> much in the way of contesting features (one exception being RCKRtty),
> but they can be used to test the characteristics of the mode.
>
> KH6TY's recommendation for using the new file is to keep two copies of
> your chosen PSK program in separate folders, one with the original PSK31
> PSKCore dll and the other with the new PSK63 version of the dll. An
> alternative method would be to place two renamed copies of the dll (e.g.
> pskcore31.dll and pskcore63.dll) in the same folder with the software,
> and create a couple of little batch files to delete the old pskcore.dll
> file and make a copy of the required one and name it pskcore.dll, then
> start the PSK software.
>
> One small "bug" to watch out for - the original PSKCore dll returns the
> audio frequency, but the new experimental one returns the frequency
> divided by two (I guess you can figure out from this how the new version
> works!). This means that the waterfall in the PSK software is
> compressed, and you will have to zoom in one step more than you would in
> PSK31.
>
> So far the two QSOs I have had in this mode were somewhere around
> 14074.3 kHz true frequency - one with KH6TY (in SC) and one with PJ2MI.
> My radio dial was set around 14072.9 in USB, and the reported audio
> frequency was about 700 Hz (actually 1400). I haven't heard KB2EOQ yet,
> but that's not too surprising on 20 meters - we're in each other's skip
> zone. Yep, here W5BBR is in a PSK63 QSO with KB2EOQ on 14074.4 - Bill
> has a strong signal here, but I can't see any sign of Andy at all.
>
> Yes, it's AFSK, so you have to watch out for overdriving (no ALC
> indication, sound card output level not too near the top). OTOH, it's
> faster than RTTY (around 100 wpm, more or less - the characters are
> variable length, so it's hard to be precise), and it occupies less
> bandwidth (nominally 63 Hz). It will be interesting to see whether it
> actually works out. I wouldn't expect it to have much impact on existing
> PSK31 ragchewing, because most hams cannot type fast enough to justify
> the increased bandwidth over PSK31. For contesting and DXing, where you
> can rely almost completely on macros, it seems to have more promise.
> Certainly the idea of fitting several QSOs into the same bandwidth as a
> single RTTY QSO without giving away anything in speed is an interesting
> one.
>
> Besides, Don, this way you can actually make use of the USB mode on your
> radio without having to find your microphone (gee, I know one of those
> things came with my radio, but I'm darned if I know where I put it!). I
> suspect this mode will be most interesting to people who can use narrow
> filters in USB or LSB mode. If your radio insists on making you use wide
> filters in SSB, it might not be quite so attractive.
>
> 73,
> Rich VE3IAY
>
>
>
>
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