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1. [TenTec] 9MHz 500HZ filter (score: 1): Author: "Zivney, Terry L." <00tlzivney@bsu.edu>; Date: Wed, 14 Jan 2004 16:04:00 -0500; I note in my new Orion that the supplied roofing filters have 4 crystals each, which is sufficient given their intended purpose. The accessory filters for the Orion, since they are also used in older; /archives//html/TenTec/2004-01/msg00457.html (7,790 bytes)
2. RE: [TenTec] 9MHz 500HZ filter (score: 1): Author: "Rick Westerman" <Rick@dj0ip.de>; Date: Wed, 14 Jan 2004 22:32:10 +0100; This Roofing Filter subject has me a bit uncertain. If we insert 6-pole or 8-pole filters instead of 4-pole filters, we will have more insertion loss - and it is not trivial. I was thinking about usi; /archives//html/TenTec/2004-01/msg00460.html (8,761 bytes)
3. RE: [TenTec] 9MHz 500HZ filter (score: 1): Author: nq5t@comcast.net; Date: Wed, 14 Jan 2004 23:02:30 +0000; T-T supplies the higher pole filters for the optional positions I recently installed both the standard T-T 500Hz/#217 and 1800Hz/#218) roofing filters. It would appear that the gain compensation for; /archives//html/TenTec/2004-01/msg00463.html (10,247 bytes)
4. [TenTec] 9MHz 500HZ filter (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Wed, 14 Jan 2004 18:08:17 -0500; crystals and the necessary capacitors to make a 600Hz filter with 200 ohms termination impedance, which I believe is the same impedance as the Ten-Tec filters. This kit, without a circuit board, is o; /archives//html/TenTec/2004-01/msg00465.html (11,275 bytes)
5. [TenTec] 9MHz 500HZ filter (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Wed, 14 Jan 2004 18:35:30 -0500; down versus the stock 1000 Hz filter which is ~1070 Hz at 6 dB down, so there should be some noticeable improvement in dynamic range performance at very close spacings. Just to make a better comparis; /archives//html/TenTec/2004-01/msg00468.html (8,038 bytes)
6. [TenTec] 9MHz 500HZ filter (score: 1): Author: "Zivney, Terry L." <00tlzivney@bsu.edu>; Date: Thu, 15 Jan 2004 09:37:34 -0500; 250 and 500 Hz filters DO have higher insertion loss so Ten-Tec compensates for this by using an additional stage of amplification. BUT this also causes the 3-5 dB DR degradation ARRL noted in their; /archives//html/TenTec/2004-01/msg00475.html (9,557 bytes)
7. [TenTec] 9MHz 500HZ filter (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Thu, 15 Jan 2004 12:26:00 -0500; of ones homebrew 4 pole filter to bring the level back down to that expected by the receiver. In doing so, one might consider equalizing the loss to that of the 250Hz filter, which has a couple of dB; /archives//html/TenTec/2004-01/msg00480.html (14,611 bytes)

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