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1. [RTTY] INRAD filter question (score: 1): Author: David VE3VID <ve3vid@hotmail.com>; Date: Sat, 25 Sep 2010 20:40:16 -0400; Last spring I got some good info and help from RTTY hams here about loading a set of INRAD filters into my Kenwood TS-450s. I chose 2 x 400hz filters for the 8.83 and 455 IF stages. The units went in; /archives//html/RTTY/2010-09/msg00094.html (7,653 bytes)
2. Re: [RTTY] INRAD filter question (score: 1): Author: "Jim W7RY" <w7ry@inbox.com>; Date: Sat, 25 Sep 2010 18:04:01 -0700; What mode do you have the radio in? 73 Jim W7RY _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.com/mailman/listinfo/rtty; /archives//html/RTTY/2010-09/msg00095.html (10,610 bytes)
3. Re: [RTTY] INRAD filter question (score: 1): Author: David VE3VID <ve3vid@hotmail.com>; Date: Sat, 25 Sep 2010 21:24:36 -0400; The rig is set to LSB, all the standard setting for MMTTY _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.com/mailman/listinfo/rtty; /archives//html/RTTY/2010-09/msg00096.html (11,406 bytes)
4. Re: [RTTY] INRAD filter question (score: 1): Author: "Jim W7RY" <w7ry@inbox.com>; Date: Sat, 25 Sep 2010 18:27:40 -0700; you need to switch to RTTY or digital whichever your rig has. the filters are centered on 600 Hz in SSB or CW and 2125 in rtty mode. 73 Jim w7RY _______________________________________________ RTTY m; /archives//html/RTTY/2010-09/msg00097.html (13,101 bytes)
5. Re: [RTTY] INRAD filter question (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 25 Sep 2010 21:32:26 -0400; This indicates you are probably using AFSK in USB. The narrow filters are aligned for RTTY (FSK) mode which is in LSB using "high tones" - 2125 Hz Mark, 2295 Hz Space (TS-450/690 Instruction Manual,; /archives//html/RTTY/2010-09/msg00098.html (10,365 bytes)
6. Re: [RTTY] INRAD filter question (score: 1): Author: David VE3VID <ve3vid@hotmail.com>; Date: Sat, 25 Sep 2010 21:40:34 -0400; Ummmm.......nope. I had the rig in LSB (AFSK). And the tone pair as set by MMTTY is 2125/170 _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contest; /archives//html/RTTY/2010-09/msg00099.html (11,480 bytes)
7. Re: [RTTY] INRAD filter question (score: 1): Author: "Tom Osborne" <w7why@frontier.com>; Date: Sat, 25 Sep 2010 18:43:48 -0700; Hi David I have the same setup as you--2 Inrad filters. They won't work in AFSK. You have to run FSK to use the narrow CW filters. 73 Tom W7WHY _______________________________________________ RTTY ma; /archives//html/RTTY/2010-09/msg00100.html (8,244 bytes)
8. Re: [RTTY] INRAD filter question (score: 1): Author: David VE3VID <ve3vid@hotmail.com>; Date: Sat, 25 Sep 2010 21:48:51 -0400; Wow. Well if thats the case it was an expensive waste of $300. However, why would the filters be unusable in AFSK(LSB)? Dont they just narrow the IF bandpass to 400hz? _______________________________; /archives//html/RTTY/2010-09/msg00101.html (8,920 bytes)
9. Re: [RTTY] INRAD filter question (score: 1): Author: "Jim W7RY" <w7ry@inbox.com>; Date: Sat, 25 Sep 2010 18:52:16 -0700; FSK is MUCH better than AFSK.... What are you using for a computer and software? I use windows XP and MMTTY with N1MM. Works just fine in FSK mode. Is there a particular reason you don't want to run; /archives//html/RTTY/2010-09/msg00102.html (9,973 bytes)
10. Re: [RTTY] INRAD filter question (score: 1): Author: David VE3VID <ve3vid@hotmail.com>; Date: Sat, 25 Sep 2010 22:06:41 -0400; The laptop is a Gateway running XP, N1MM, into a SignaLink USB outboard sound card, into the ACC port on the TS-450s. I am neither for or against true FSK, just the SignaLink allows me to do many oth; /archives//html/RTTY/2010-09/msg00103.html (11,966 bytes)
11. Re: [RTTY] INRAD filter question (score: 1): Author: "Jim W7RY" <w7ry@inbox.com>; Date: Sat, 25 Sep 2010 19:14:30 -0700; you can probably use the BPF and IF shift to center LSB into the filters passband. Then you will have to use 2125/2295 for tones. 73 Jim w7RY _______________________________________________ RTTY mail; /archives//html/RTTY/2010-09/msg00104.html (13,702 bytes)
12. Re: [RTTY] INRAD filter question (score: 1): Author: "David Levine" <david@levinecentral.com>; Date: Sun, 26 Sep 2010 02:20:32 +0000; David, I have a Kenwood TS-2000 and used the SignaLink at first and still use it for modes other then RTTY. On the TS-2000 you need to run FSK to take advantage of the built in filters. A friend made; /archives//html/RTTY/2010-09/msg00105.html (13,060 bytes)
13. Re: [RTTY] INRAD filter question (score: 1): Author: David VE3VID <ve3vid@hotmail.com>; Date: Sat, 25 Sep 2010 22:39:14 -0400; Okay, so you think if I adjust my IF shift it will help? When I click either filter in its like a dead band as I tune along. Like a 60db attenuator is on. ____________________________________________; /archives//html/RTTY/2010-09/msg00106.html (14,400 bytes)
14. Re: [RTTY] INRAD filter question (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 25 Sep 2010 23:00:31 -0400; If the IF shift has enough range it will work. Find a "dead" place on the band, select the narrow filers and turn the IF shift one way or the other to the stops and see if you hear noise come up. 73; /archives//html/RTTY/2010-09/msg00107.html (15,531 bytes)
15. Re: [RTTY] INRAD filter question (score: 1): Author: "Jim W7RY" <w7ry@inbox.com>; Date: Sat, 25 Sep 2010 21:01:03 -0700; If the rig is truly dead, do you have the filters in the correct slots? 73 Jim W7RY _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.com/m; /archives//html/RTTY/2010-09/msg00108.html (17,379 bytes)
16. Re: [RTTY] INRAD filter question (score: 1): Author: David VE3VID <ve3vid@hotmail.com>; Date: Sun, 26 Sep 2010 11:11:33 -0400; Confusion is clearing a bit, check my thinking on this.................. The 400hz filters are listening over a portion of the band away from the section where the mark and space tones will be heard.; /archives//html/RTTY/2010-09/msg00109.html (17,780 bytes)
17. Re: [RTTY] INRAD filter question (score: 1): Author: Alfred Frugoli <al@frugoli.info>; Date: Sun, 26 Sep 2010 13:05:19 -0400; Daivd, Check this post on my blog. It should be helpful for a circuit to generate FSK via USB. 73 de Al, KE1FO K3 #3055 K3 #4094 -- Check out my Amateur Radio Contesting blog at ke1fo.wordpress.com.; /archives//html/RTTY/2010-09/msg00110.html (19,656 bytes)
18. Re: [RTTY] INRAD filter question (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sun, 26 Sep 2010 18:07:33 -0400; If the narrow filter is centered at 600 Hz in LSB, a 2.2 KHz offset should get you to 2800 Hz which should be more than enough. Check it though. See the information on AA5AU's web page: http://www.a; /archives//html/RTTY/2010-09/msg00113.html (10,603 bytes)
19. Re: [RTTY] INRAD filter question (score: 1): Author: David VE3VID <ve3vid@hotmail.com>; Date: Sun, 26 Sep 2010 21:38:51 -0400; So its all good news. Adjusting the IF shift brought the RTTY signal into the passband of the 400hz filter using AFSK in LSB. Notwithstanding the technical reasons this worked, it was a beautiful thi; /archives//html/RTTY/2010-09/msg00115.html (12,939 bytes)
20. Re: [RTTY] INRAD filter question (score: 1): Author: "Tom Osborne" <w7why@frontier.com>; Date: Sun, 26 Sep 2010 18:49:08 -0700; Hi David Go to www.k4abt.com. He makes a RASCAL that works great for FSK RTTY with the TS-450. I have 2 of them here, plus one for AFSK with my FT-840 when I use it. They are pretty cheap and they wo; /archives//html/RTTY/2010-09/msg00116.html (14,080 bytes)

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