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1. [RTTY] The Problem with AFSK ... (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 19 Jan 2013 12:00:27 -0500; With all the recent talk that AFSK is cleaner than FSK, this morning on 12 meters I watched a classic example of the problems with using AFSK and the reason I would rather put up with the "hard" keyi; /archives//html/RTTY/2013-01/msg00224.html (9,751 bytes)
2. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: Peter Laws <plaws@plaws.net>; Date: Sat, 19 Jan 2013 11:50:44 -0600; I think you are confusing technology with operator skill. I have no doubt that W7AY can put out a cleaner RTTY signal using AFSK than I can with my IC746Pro running FSK, but FSK is a LOT harder to sc; /archives//html/RTTY/2013-01/msg00225.html (7,126 bytes)
3. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 19 Jan 2013 13:21:06 -0500; No, I'm viewing the entire "system" ... you're very correct that it's relatively easy to generate a cleaner signal *from the sound card* in AFSK but there are so many more opportunities to screw it; /archives//html/RTTY/2013-01/msg00226.html (9,274 bytes)
4. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 19 Jan 2013 13:51:27 -0500; Doesn't mean a thing if the level going into the mic jack is already too high for the microphone preamplifier. Most rigs that use dynamic mics (Kenwood, Yaesu, Ten-Tec) will clip in the mic preamp if; /archives//html/RTTY/2013-01/msg00227.html (10,322 bytes)
5. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: "Jim W7RY" <w7ry@centurytel.net>; Date: Sat, 19 Jan 2013 11:18:15 -0800; I have no doubt that W7AY can put out a cleaner RTTY signal using AFSK than I can with my IC746Pro running FSK,..... I'd have to see it to believe that this statement is true. 73 Jim W7RY -- Peter La; /archives//html/RTTY/2013-01/msg00228.html (8,547 bytes)
6. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: Kok Chen <chen@mac.com>; Date: Sat, 19 Jan 2013 11:43:29 -0800; This is why I always advised against using the mic input for AFSK. By the time you saturate the mic pre-amp, it is game over. You are most likely to present a non-symmetrical signal to the balanced m; /archives//html/RTTY/2013-01/msg00230.html (10,074 bytes)
7. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: John Merrill <johnn1jm@gmail.com>; Date: Sat, 19 Jan 2013 12:51:48 -0700; Do K3s key click using FSKD or 590s using FSK? John N1JM -- sent on my MacbookPro _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.com/mai; /archives//html/RTTY/2013-01/msg00231.html (11,053 bytes)
8. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 19 Jan 2013 15:20:20 -0500; Unfortunately West Mountain Radio and Signalink both do exactly this by default. For example - Signalink cables: SLUSB4R - For 4-Pin Round Mic Connector SLUSB8R - For 8-Pin Round Mic Connector SLUSB; /archives//html/RTTY/2013-01/msg00232.html (12,796 bytes)
9. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: Robert Chudek - K0RC <k0rc@citlink.net>; Date: Sat, 19 Jan 2013 14:26:30 -0600; "How many "clicky" FT-1000D, FT-1000MP and FT-1000MP MKV transceivers (and their Icom counterparts) are still in regular use today even though they are 15, 20 even 30 years old?" This sounds like a p; /archives//html/RTTY/2013-01/msg00233.html (14,110 bytes)
10. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: Robert Chudek - K0RC <k0rc@citlink.net>; Date: Sat, 19 Jan 2013 14:31:36 -0600; "Like I have personally discussed with a few folks, the problem with FSK keyclicks is that we have to wait for the manufacturers to get off their behinds and do something about it (just look at how l; /archives//html/RTTY/2013-01/msg00234.html (12,038 bytes)
11. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: Richard Ferch <ve3iay@storm.ca>; Date: Sat, 19 Jan 2013 17:06:56 -0500; Do K3s key click using FSKD or 590s using FSK? Yes. For the K3, the evidence has been published; the K3 is capable of producing cleaner RTTY (lower levels of key clicks) in AFSK than it is in FSK: 1; /archives//html/RTTY/2013-01/msg00235.html (11,193 bytes)
12. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: Carter <k8vt@ameritech.net>; Date: Sat, 19 Jan 2013 17:48:41 -0500; [snip] Let me go where angels fear to tread --and put on my asbestos suit -- before I put in my 2 cents worth... 1) AFIK, there are two types of "FSK": a) FSK that is generated internal to the rig w; /archives//html/RTTY/2013-01/msg00236.html (9,916 bytes)
13. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: "Paul" <w8aef@q.com>; Date: Sat, 19 Jan 2013 16:33:37 -0700; Does anyone know if the FT-1000D is true FSK or is it AFSK? I tried to follow the circuit diagram but got lost, I suspect it is AFSK. de Paul, W8AEF 1) AFIK, there are two types of "FSK": a) FSK that; /archives//html/RTTY/2013-01/msg00237.html (9,134 bytes)
14. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: Kok Chen <chen@mac.com>; Date: Sat, 19 Jan 2013 15:46:31 -0800; We used to call it "Keyed AFSK" where the FSK keying line actually keys an internal AFSK generator in the rig. The FT-1000D, and my old FT-990 are of this variety. Notice that even the Omni VI (and O; /archives//html/RTTY/2013-01/msg00238.html (13,812 bytes)
15. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: Kok Chen <chen@mac.com>; Date: Sat, 19 Jan 2013 15:52:36 -0800; Keyed AFSK. Not Direct FSK. Look for a switch-tail ring counter with a set of resistors that has the weight of a sine table :-). That is the way it appears in the FT-990 schematics. The rig clocks th; /archives//html/RTTY/2013-01/msg00239.html (9,028 bytes)
16. Re: [RTTY] The Problem with AFSK ... (score: 1): Author: John Merrill <johnn1jm@gmail.com>; Date: Sat, 19 Jan 2013 17:15:16 -0700; The TS-480 also uses "keyed afsk". John N1JM -- sent on my MacbookPro _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.com/mailman/listinf; /archives//html/RTTY/2013-01/msg00240.html (9,976 bytes)
17. [RTTY] The Problem with AFSK ... (score: 1): Author: "Joe Subich, W4TV" <w4tv@subich.com>; Date: Sat, 19 Jan 2013 11:32:00 -0500; With all the recent talk that AFSK is cleaner than FSK, this morning on 12 meters I watched a classic example of the problems with using AFSK and the reason I would rather put up with the "hard" keyi; /archives//html/RTTY/2013-01/msg00247.html (10,168 bytes)
18. [RTTY] The Problem with AFSK ... (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 13 Mar 2014 16:51:02 -0400; Lest anyone misunderstand the problem with AFSK and why I am still so adamant that the only way to generate RTTY is FSK, take a look at the spectrum capture I placed on the web site this afternoon: h; /archives//html/RTTY/2014-03/msg00052.html (7,752 bytes)

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