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1. [TenTec] Roof filters (score: 1): Author: Robert Tortajada <n6ri@rtort.com>; Date: Mon, 13 Mar 2006 14:21:38 -0800; I just sent in my order for my O2. I had a question about which roof filters to get. I went fo the 1.8 and 300 but I might change this. I figured that the 1.8 would work well for naroow SSB, and that; /archives//html/TenTec/2006-03/msg00646.html (7,503 bytes)
2. Re: [TenTec] Roof filters (score: 1): Author: "Larry Menzel" <retire@means.net>; Date: Mon, 13 Mar 2006 17:28:10 -0600; Bob, Congratulations on the OII...hope you get it soon. I sure enjoy mine. Filters: Get all three. It's an inconsequential cost (when compared with the cost of the radio) and you'll be glad you did.; /archives//html/TenTec/2006-03/msg00647.html (8,787 bytes)
3. Re: [TenTec] Roof filters (score: 1): Author: "Richard Williams" <richardw@mho.com>; Date: Mon, 13 Mar 2006 16:35:36 -0700; Bob, I had the Orion I and now the Orion II. Purchased all the option filters for both (International Radio for the I and the standard TenTec ones for the II). I have never used the 300 in either rad; /archives//html/TenTec/2006-03/msg00648.html (9,361 bytes)
4. Re: [TenTec] Roof filters (score: 1): Author: "Don and Diana Cunningham" <wb5hak@duracom.net>; Date: Mon, 13 Mar 2006 18:35:14 -0600; Bob, I'm sure you will get all kinds of ideas, and the advice I have already seen concerning roofing filters vs standard ones is good, but I just installed all three optional ones in my O2 today. I'm; /archives//html/TenTec/2006-03/msg00653.html (7,732 bytes)
5. Re: [TenTec] Roof filters (score: 1): Author: Duane A Calvin <ac5aa@juno.com>; Date: Mon, 13 Mar 2006 22:19:17 -0600; I don't think the 300 Hz roofing filter would be too narrow for RTTY - the 170 or 200 Hz shift used in RTTY or Pactor should have no problems within a 300 Hz 4-pole filter. Remember, sharp skirts are; /archives//html/TenTec/2006-03/msg00661.html (8,147 bytes)
6. [TenTec] Roof filters (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Tue, 14 Mar 2006 07:16:32 -0500; filters to get. I went fo the 1.8 and 300 but I might change this. I figured that the 1.8 would work well for naroow SSB, and that for CW, the 300 would be better. My thinking is that the 1k will wor; /archives//html/TenTec/2006-03/msg00670.html (9,287 bytes)
7. Re: [TenTec] Roof filters (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Tue, 14 Mar 2006 07:50:42 -0500; .. Roofing filter has one BW in CW, another in SSB? 73, Sinisa YT1NT, VE3EA _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailm; /archives//html/TenTec/2006-03/msg00671.html (6,686 bytes)
8. [TenTec] Roof filters (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Tue, 14 Mar 2006 09:20:36 -0500; YT1NT replied: Correct....measured using Spectrogram but I have never received an explanation from Ten-Tec, although I have asked several times. There is obviously some other effect going on because; /archives//html/TenTec/2006-03/msg00674.html (8,040 bytes)
9. [TenTec] Roof filters (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Wed, 15 Mar 2006 09:45:20 -0500; YT1NT replied: I finally figured out what is going on. Orion always automatically centers the passband of the roofing filter selected and also automatically truncates any response below 0 Hz. If you; /archives//html/TenTec/2006-03/msg00720.html (7,400 bytes)
10. Re: [TenTec] Roof filters (score: 1): Author: Kc9cdt@aol.com; Date: Wed, 15 Mar 2006 09:59:40 EST; Bill, Thanks you very much for that hard work. Now that sounds like a filter I need both for SSB (mostly) and useful for CW as well!!!! 73, Lee _______________________________________________ TenTec; /archives//html/TenTec/2006-03/msg00722.html (7,448 bytes)
11. Re: [TenTec] Roof filters (score: 1): Author: "Carl Moreschi" <n4py@arrl.net>; Date: Wed, 15 Mar 2006 10:13:09 -0500; The algorithm for centering the DSP filter is a little different. If X is the spot tone frequency and BW if the filter width, then if BW/2 < X then the filter center is X if BW/2 > X then the filter; /archives//html/TenTec/2006-03/msg00723.html (9,237 bytes)

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