- 1. Re: [RTTY] EU1SA, AA6YQ profiles in MMTTY (score: 1)
- Author: Jeff Blaine <keepwalking188@yahoo.com>
- Date: Thu, 12 Mar 2009 12:42:03 -0500
- Hi Dave, May I know if there is another profile available that is optimized for weak signal work? Meaning the settings are providing the maximum ability to deal with low SNR conditions. THanks 73/jef
- /archives//html/RTTY/2009-03/msg00203.html (13,207 bytes)
- 2. Re: [RTTY] EU1SA, AA6YQ profiles in MMTTY (score: 1)
- Author: Jeff Blaine <keepwalking188@yahoo.com>
- Date: Thu, 12 Mar 2009 20:48:08 -0500
- Hi Dave, I will be looking very much forward to your magic touch on MMTTY. Just thought that this program is so widely used by the RTTY enthuiast community, that some enterprising DX'er would have co
- /archives//html/RTTY/2009-03/msg00205.html (15,394 bytes)
- 3. Re: [RTTY] Query (score: 1)
- Author: Jeff Blaine <keepwalking188@yahoo.com>
- Date: Sun, 29 Mar 2009 19:59:36 -0500
- Hi Bill, Great information on RITTY. It's a real shame that code could not be rolled into a modern program. As far as I've seen, none of the modern decoders are said to work as well. But then again,
- /archives//html/RTTY/2009-03/msg00387.html (9,514 bytes)
- 4. [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 25 Aug 2009 12:23:26 -0500
- Gentlemen, I and a few other guys are working on a project to get a very high quality set of crystal filters built for the Yaesu FT2000. The rig is an otherwise very fine unit but the front end is a
- /archives//html/RTTY/2009-08/msg00101.html (8,266 bytes)
- 5. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 25 Aug 2009 14:09:27 -0500
- Glenn, Many thanks. Now that reply - that's what I like. A man with an unambiguous position! I guess you are saying, "any filter is fine, as long as it's 300 hz." :) 73/jeff/ac0c ____________________
- /archives//html/RTTY/2009-08/msg00103.html (10,260 bytes)
- 6. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 25 Aug 2009 16:42:52 -0500
- Thanks John, that's great info. 73/jeff/ac0c _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.com/mailman/listinfo/rtty
- /archives//html/RTTY/2009-08/msg00108.html (11,524 bytes)
- 7. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 25 Aug 2009 19:00:11 -0500
- Thanks Joe for that great detail. I did not realize the 250 hz K3 filter ran close to 370 @ -6db. The 400 hz is only 50 hz wider at the -6db point - quite close to the named value. The SSB filters lo
- /archives//html/RTTY/2009-08/msg00114.html (12,654 bytes)
- 8. Re: [RTTY] Best filter...its all in the shape factor. (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 25 Aug 2009 21:55:13 -0500
- Ron, S&P - you make a good point. If you are in the RUN mode, what's your preference? 73/jeff/ac0c _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.c
- /archives//html/RTTY/2009-08/msg00117.html (7,993 bytes)
- 9. Re: [RTTY] For more math (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 25 Aug 2009 21:56:10 -0500
- Joe, That's great info. 73/jeff/ac0c _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.com/mailman/listinfo/rtty
- /archives//html/RTTY/2009-08/msg00118.html (9,053 bytes)
- 10. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 25 Aug 2009 22:00:09 -0500
- John, Thank you. Today we have been looking at the actual widths vs. the named widths on some of these filters. There is a lot more disparity on the low bandwidth end than on the wider filters which
- /archives//html/RTTY/2009-08/msg00119.html (12,599 bytes)
- 11. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Wed, 26 Aug 2009 00:59:24 -0500
- Chen, You are right about the ideal DSP being able to handle the selectivity processing. But for our project, we are not assuming that is the case at all. The filter specifications are under our cont
- /archives//html/RTTY/2009-08/msg00122.html (14,088 bytes)
- 12. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Wed, 26 Aug 2009 13:36:35 -0500
- John, That's great to know. Looking at the -6db point, I want to say that Inrad filter runs close to 300 hz or so. Thanks for your comments 73/jeff/ac0c ______________________________________________
- /archives//html/RTTY/2009-08/msg00129.html (15,979 bytes)
- 13. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Thu, 27 Aug 2009 01:08:16 -0500
- Chen, Thanks for pointing me to Jim's site on this filter comparison. I have used his RFI white paper and RF choke design recommendations before. He really is one of the masters. K3 400 is 425. I thi
- /archives//html/RTTY/2009-08/msg00131.html (13,755 bytes)
- 14. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Thu, 27 Aug 2009 13:31:37 -0500
- Chen, Fascinating explanation. Best technical treatment of this subject I've seen. The summary trade-off compromise (if I am understanding your comments properly) is something like this: 1. With a mo
- /archives//html/RTTY/2009-08/msg00136.html (17,709 bytes)
- 15. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Thu, 27 Aug 2009 15:24:04 -0500
- Chen, I met my Chinese wife when I lived in China and wanted to learn Chinese. So from 3rd language standpoint, I consider your English to be really excellent. And I also 100% understand your meaning
- /archives//html/RTTY/2009-08/msg00138.html (15,166 bytes)
- 16. Re: [RTTY] Crystal filter width preferences for RTTY contesting (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Thu, 27 Aug 2009 17:55:30 -0500
- Joe, Thanks for catching my error. The wider bandwidth improves the SNR to an extent. I would think this is an asymptotic curve to a point... You make good points about the practical nature of this d
- /archives//html/RTTY/2009-08/msg00141.html (21,345 bytes)
- 17. Re: [RTTY] AFSK vs FSK question (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Mon, 5 Oct 2009 15:49:58 +0800
- David, The trend with RTTY is more toward software demodulation - and it's been that case for years now. Dedicated terminal units like KAM are functional - but unless you have a 1990 vintage PC in yo
- /archives//html/RTTY/2009-10/msg00033.html (11,492 bytes)
- 18. Re: [RTTY] 160m in RTTY Contests (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Mon, 26 Oct 2009 19:14:45 -0500
- That is a great idea Bill 73/jeff/ac0c _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.com/mailman/listinfo/rtty
- /archives//html/RTTY/2009-10/msg00160.html (8,945 bytes)
- 19. Re: [RTTY] Topband: 160m in RTTY Contests (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 27 Oct 2009 19:21:24 -0500
- Gentlemen, I am confused at the comments of "narrow band" - and considering that 160m is 200khz wide. These two ideas do not seem to go together. So I wonder if there exists an assumption is that the
- /archives//html/RTTY/2009-10/msg00207.html (12,928 bytes)
- 20. Re: [RTTY] Topband: 160m in RTTY Contests (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Sat, 31 Oct 2009 13:19:09 -0500
- Joe, Serious about this reply? RTTY is "polluting" the band and somehow AM is acceptable? How many RTTY sigs can you get into the bandwidth of a single AM transmission. In fact, how many RTTY sigs co
- /archives//html/RTTY/2009-10/msg00248.html (13,473 bytes)
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