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1. [TenTec] Why "roofing" ? (score: 1): Author: Able2fly@aol.com; Date: Tue, 3 Aug 2004 13:46:19 EDT; Can someone please explain how a "roofing" filter differs from the old fashioned (band pass) IF filter? Or is it just another name for it? Bill K3UJ _______________________________________________ Te; /archives//html/TenTec/2004-08/msg00118.html (6,965 bytes)
2. Re: [TenTec] Why "roofing" ? (score: 1): Author: "Carl Moreschi" <n4py@earthlink.net>; Date: Tue, 3 Aug 2004 17:53:10 -0000; The term "Roofing filter" applies to a filter that is at the very first IF of a receiver chain. This prvents unwanted signals from going any further in the radio and causing potential problems. Norma; /archives//html/TenTec/2004-08/msg00119.html (7,697 bytes)
3. RE: [TenTec] Why "roofing" ? (score: 1): Author: "NJ0IP" <Rick@dj0ip.de>; Date: Tue, 3 Aug 2004 18:34:20 -0700; Bill, Carl answered most of this already, but here's another point. Most of the rigs built in the past 15 years had a roofing filter which was in its first IF, somewhere between 45 and 70 MHz. These; /archives//html/TenTec/2004-08/msg00120.html (8,227 bytes)
4. Re: [TenTec] Why "roofing" ? (score: 1): Author: w8au@sssnet.com; Date: Tue, 03 Aug 2004 14:58:45 -0400; At 01:46 PM 08/03/2004, Able2fly@aol.com wrote: Can someone please explain how a "roofing" filter differs from the old fashioned (band pass) IF filter? Or is it just another name for it? Bill: It app; /archives//html/TenTec/2004-08/msg00121.html (8,066 bytes)
5. Re: [TenTec] Why "roofing" ? (score: 1): Author: "n4lq" <n4lq@iglou.com>; Date: Tue, 03 Aug 2004 15:23:04 -0400; Sure. Most all rigs used crystal filters. Manufactures made lots of money on them. Then their engineers designed rigs that didn't need the expensive filters so the marketing departments made sure the; /archives//html/TenTec/2004-08/msg00125.html (8,346 bytes)
6. Re: [TenTec] Why "roofing" ? (score: 1): Author: Ynkedragon@aol.com; Date: Tue, 3 Aug 2004 17:12:53 EDT; << Most of the rigs built in the past 15 years had a roofing filter which was in its first IF, somewhere between 45 and 70 MHz. These were typically only 2-pole filters and wide as a barn door (20 kH; /archives//html/TenTec/2004-08/msg00133.html (7,745 bytes)

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