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1. [TenTec] Omni6+ roofing filter (score: 1): Author: petvet@adelphia.net (Scott Johns); Date: Sat Jun 14 22:04:38 2003; Reading the schematic, it looks like the omni6+ has a rather wide 2 pole roofing filter (designed to accommodate FM, SSB, etc). Such a design obviously compromises the receiver for us cw only folks.; /archives//html/TenTec/2003-06/msg00480.html (7,765 bytes)
2. [TenTec] Omni6+ roofing filter (score: 1): Author: csturner@slonet.org (Clark Savage Turner); Date: Mon Jun 16 11:01:08 2003; INRAD did some experiments with a narrower roofing filter in the OMNI VI and the improvements were not large. The OMNI VI has such a solid front end that the roofing filter is apparently not a big de; /archives//html/TenTec/2003-06/msg00506.html (8,460 bytes)
3. [TenTec] Omni6+ roofing filter (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon Jun 16 11:07:53 2003; What frequency is the OMNI 6+'s first IF? On many general coverage radios, the first IF is up in the lower VHF region, apparently to reduce spurious responses. I talked with George at some length at; /archives//html/TenTec/2003-06/msg00508.html (8,656 bytes)
4. [TenTec] Omni6+ roofing filter (score: 1): Author: petvet@adelphia.net (Scott Johns); Date: Mon Jun 16 11:32:06 2003; Pete, I'll check the first IF and let you know...have to get to work now but will try looking it up thisafternoon. 73, Scott VI front What frequency is the OMNI 6+'s first IF? On many general coverag; /archives//html/TenTec/2003-06/msg00509.html (9,168 bytes)
5. [TenTec] Omni6+ roofing filter (score: 1): Author: n4py@qvssoftware.com (N4PY); Date: Mon Jun 16 12:12:26 2003; The Omni VI first IF is 9 mhz. You have always been able to get narrow filters there. Carl Moreschi N4PY; /archives//html/TenTec/2003-06/msg00510.html (10,250 bytes)
6. [TenTec] Omni6+ roofing filter (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon Jun 16 13:43:24 2003; Fair enough -- so it's a mystery why a narrow roofing filter *wouldn't* help, isn't it? A 1-kHz filter there should result in a usefully better close-in IMD figure, I'd think... 73, Pete N4ZR The Wor; /archives//html/TenTec/2003-06/msg00512.html (8,111 bytes)
7. [TenTec] Omni6+ roofing filter (score: 1): Author: n4py@qvssoftware.com (N4PY); Date: Mon Jun 16 14:37:00 2003; The "nar" button selects filters at the 9 mhz first IF already. You can use as narrow at 250 hertz in the 9 mhz "nar" position on the Omni VI. There's no mystery. Carl Moreschi N4PY; /archives//html/TenTec/2003-06/msg00513.html (8,949 bytes)
8. [TenTec] Omni6+ roofing filter (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon Jun 16 17:37:33 2003; Fascinating -- I learn something new every day. I wonder why the Omni's IMD performance isn't even better, then? According to Inrad's table of available filters, there are only two IFs where filters; /archives//html/TenTec/2003-06/msg00525.html (7,920 bytes)
9. [TenTec] Omni6+ roofing filter (score: 1): Author: w5yr@att.net (George, W5YR); Date: Mon Jun 16 19:19:17 2003; In order to contain strong signals and spurs, as well as perform their fundamental job of image-rejection, roofing filters must be installed as near the front-end of the receiver as possible. The pre; /archives//html/TenTec/2003-06/msg00528.html (9,961 bytes)
10. [TenTec] Omni6+ roofing filter (score: 1): Author: csturner@slonet.org (Clark Savage Turner); Date: Mon Jun 16 19:21:22 2003; The little filter ahead of the rest in the 9 MHz IF can be replaced by a nice, narrow filter as George at INRAD did. It helps some, but it is not much of a deal as the front end is already designed r; /archives//html/TenTec/2003-06/msg00529.html (9,083 bytes)
11. [TenTec] Omni6+ roofing filter (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Jun 16 22:24:20 2003; Its really NO mystery why a narrow "roofing" filter didn't help. It just means that the IMD isn't limited by the first IF and second mixer whether close in or with wide spread signals. It means that; /archives//html/TenTec/2003-06/msg00534.html (12,741 bytes)
12. [TenTec] Omni6+ roofing filter (score: 1): Author: ken.d.brown@verizon.net (Ken Brown); Date: Tue Jun 17 02:47:17 2003; Jerry, Thanks for the very informative post. I wonder if you or anyone else on the reflector has any information about narrower and/or steeper skirted than stock roofing filters for the JA rigs. I ha; /archives//html/TenTec/2003-06/msg00538.html (8,311 bytes)
13. [TenTec] Omni6+ roofing filter (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Jun 17 10:43:28 2003; One other reason for roofing filter bandwidth is the noise blanker. Narrower and/or steeper skirted broadens out the noise impulses making them harder to detect and strip out. 73, Jerry, K0CQ -- Enti; /archives//html/TenTec/2003-06/msg00540.html (8,081 bytes)

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