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381. Re: [RTTY] RTTY Roundup - PSK ?? (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Sat, 29 Dec 2007 16:49:43 -0800
Whoops, I just saw this posting by Barry after sending my previous message. When there is no polar or trans-equatorial flutter, PSK31 beats RTTY by about 6 dB in terms of SNR. I was one of the people
/archives//html/RTTY/2007-12/msg00218.html (8,378 bytes)

382. Re: [RTTY] Receiving RTTY on Sub VFO on FT1000MP? (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Sat, 29 Dec 2007 20:23:02 -0800
I think the answer is "it depends on your software." If there is no software limitation, the answer is yes. In my case, I connect a stereo sound card (in my case a microKEYER II) to the stereo output
/archives//html/RTTY/2007-12/msg00229.html (10,239 bytes)

383. Re: [RTTY] Receiving RTTY on Sub VFO on FT1000MP? (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Sat, 29 Dec 2007 20:30:32 -0800
Whoops. Double negative. I really mean to say that "if there is no software limitation, you only need a single sound card," HI HI. 73 Chen, W7AY _______________________________________________ RTTY m
/archives//html/RTTY/2007-12/msg00230.html (7,263 bytes)

384. Re: [RTTY] VP6DX on RTTY (Ducie) (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 13 Feb 2008 09:17:00 -0800
Very good RTTY ops. Although it wouldn't hurt if they'd added a carriage return (or at least spaces) at the start or end of the exchanges. I wouldn't have noticed it, except that copy was so clean th
/archives//html/RTTY/2008-02/msg00148.html (8,262 bytes)

385. [RTTY] Spoke too soon. (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 13 Feb 2008 11:04:21 -0800
The current VP6DX op is sending just "<Callsign> 599" in their RTTY exchanges. Perhaps it is a CW op using a Morse paddle to work RTTY on his K3 (yes, an odd feature on the K3 ). Not a good RTTY exch
/archives//html/RTTY/2008-02/msg00154.html (6,955 bytes)

386. Re: [RTTY] Spoke too soon. (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 13 Feb 2008 11:14:55 -0800
The present op is also listening up from 14089, counter to what they announced on their web site. 73 Chen, W7AY _______________________________________________ RTTY mailing list RTTY@contesting.com h
/archives//html/RTTY/2008-02/msg00155.html (7,046 bytes)

387. [RTTY] ROTFLMAO (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 13 Feb 2008 11:50:09 -0800
Lots of "usual" stuff in the VP6DX RTTY pile this morning. People sending dots in front of their callsigns (which program's canned macro started that disease anyway?), people transmitting on top of t
/archives//html/RTTY/2008-02/msg00158.html (6,453 bytes)

388. Re: [RTTY] Crazy Idea for FSK (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 13 Feb 2008 14:03:59 -0800
Not crazy at all, this has been done, see for example: http://lists.contesting.com/_rtty/2005-03/msg00035.html Remember that you also have to add a carrier detect to key the PTT line. K4DSP Doug has
/archives//html/RTTY/2008-02/msg00173.html (8,280 bytes)

389. Re: [RTTY] Crazy Idea for FSK (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 13 Feb 2008 14:10:34 -0800
By the way, if you let the rig supply the power and place the regenerator on "the other side" of the audio transformer from the sound card, you won't even need optoisolators. Just use an open collect
/archives//html/RTTY/2008-02/msg00175.html (7,540 bytes)

390. Re: [RTTY] PSK TURNOVER SPEED... (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 20 Feb 2008 11:36:08 -0800
To set the record straight -- if your rig has been adjusted properly, you don't swamp anyone. Unless you are exceeding their receiver's dynamic range, but that is not a mode-specific problem. In fact
/archives//html/RTTY/2008-02/msg00262.html (10,238 bytes)

391. Re: [RTTY] PSK Article in QST (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 20 Feb 2008 12:05:20 -0800
That might become true with MFSK16 and Olivia, but it does not appear to be so with PSK31. Just compare the activity in the PSK portion of the 20m band to the RTTY portion. How many years has it been
/archives//html/RTTY/2008-02/msg00263.html (9,380 bytes)

392. Re: [RTTY] PSK TURNOVER SPEED... (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 20 Feb 2008 12:54:08 -0800
I used to think that is a problem with PSK31, and like Phil, I used to wait for the next CQ. But I have solved this in cocoaModem back in 2005. The problem with PSK tuning is that you need to tuned t
/archives//html/RTTY/2008-02/msg00265.html (11,338 bytes)

393. Re: [RTTY] PSK TURNOVER SPEED... (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 20 Feb 2008 12:55:59 -0800
Oops, I meant "NO other." 73 Chen, W7AY _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.com/mailman/listinfo/rtty
/archives//html/RTTY/2008-02/msg00266.html (7,512 bytes)

394. Re: [RTTY] VP6DX RTTY (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Thu, 21 Feb 2008 10:14:36 -0800
I guess I must be much less discriminating than Alex. I just work them when I find them, and I find that I learn more about propagation and pileup techniques with each contact that I make. Plus, I ca
/archives//html/RTTY/2008-02/msg00290.html (9,167 bytes)

395. Re: [RTTY] Special VP6DX for EU on 17 mtrs - EU please read (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Fri, 22 Feb 2008 15:08:08 -0800
My hats off to the VP6DX team. I have never, ever before seen this kind of consideration given to RTTY operation in a DXpedition. (Not even the Parody Island operation.) 73 Chen, W7AY _______________
/archives//html/RTTY/2008-02/msg00305.html (7,010 bytes)

396. Re: [RTTY] NAQP and Linefeeds (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Sat, 23 Feb 2008 14:44:53 -0800
Just for this reason, my homebrew software has a dynamic option in its contest interface to replace carriage returns and linefeeds by space characters before they are printed to the screen. Perhaps y
/archives//html/RTTY/2008-02/msg00318.html (7,521 bytes)

397. Re: [RTTY] Screenshots of PropNet interference? (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Mon, 25 Feb 2008 12:05:49 -0800
There are many screenshots on the web of Pactor III QRM, but I haven't seen one showing PropNet QRM. The PropNet stuff is very narrow band (PSK31) and the bursts are short (the message refers you to
/archives//html/RTTY/2008-02/msg00342.html (9,064 bytes)

398. Re: [RTTY] Screenshots of PropNet interference? (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Mon, 25 Feb 2008 22:11:29 -0800
Not everything below 28.200, George. W6WX/B at 14100 kc and 21250 kc are exceptions that prove the rule which you mentioned. http://www.iaru.org/articles/9410031.pdf The approved stations not only ar
/archives//html/RTTY/2008-02/msg00363.html (8,501 bytes)

399. Re: [RTTY] VP6DX (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Tue, 26 Feb 2008 10:33:45 -0800
From their news page, VP6DX has already exceeded the previous RTTY record held by N8S. That is quite an accomplishment, considering that VP6DX only operated RTTY (so far :-) on 3 bands. My N8S log sh
/archives//html/RTTY/2008-02/msg00371.html (9,783 bytes)

400. Re: [RTTY] VP6DX (score: 1)
Author: Kok Chen <chen@mac.com>
Date: Wed, 27 Feb 2008 10:13:33 -0800
The baud rate of the FSK port in the microHAM keyers (microKeyer, digiKeyer, microKeyer II) is set using an integer whose value is 2700/ rate. Integer values that give baud rates that are closest to
/archives//html/RTTY/2008-02/msg00379.html (10,835 bytes)

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