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Total 11 documents matching your query.

1. [RFI] IN-band Filters (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Tue, 7 Nov 2006 14:53:17 -0800 (PST); Hello, I'm looking for some form of filter for the purpose of reducing interference between stations operating on the same band (ie, fone-cw). This would be used in a planned multi-transmitter contes; /archives//html/RFI/2006-11/msg00015.html (7,413 bytes)
2. Re: [RFI] IN-band Filters (score: 1): Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>; Date: Tue, 07 Nov 2006 23:19:13 +0000; That was tough enough *before*, but if the FCC continues on its present course, it'll be even tougher next Field Day. You're going to want to operate CW up through at least 3600 kHz. But you may want; /archives//html/RFI/2006-11/msg00016.html (7,701 bytes)
3. Re: [RFI] IN-band Filters (score: 1): Author: Tim Duffy K3LR <k3lr@k3lr.com>; Date: Tue, 07 Nov 2006 17:23:36 -0600; Hi Bryan! You will find this a tall order. When I was doing competitive Field Days I found that taking advantage of separation of stations and polarization diversity will provide all the isolation yo; /archives//html/RFI/2006-11/msg00017.html (9,453 bytes)
4. Re: [RFI] IN-band Filters (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 7 Nov 2006 18:26:30 -0500; You typically won't be able to have significant attenuation even with very good L/C components and stubs with their inherent low Q are out of the question. I was somewhat successful using toroids wi; /archives//html/RFI/2006-11/msg00018.html (7,596 bytes)
5. Re: [RFI] IN-band Filters (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Tue, 7 Nov 2006 17:00:14 -0800 (PST); Tom & Tim, Thanks for the quick replies. In the interest of maintaining Q, I have access to tight tolerance porcelain (very low ESR) capacitors and up to #10 polyimide-coated wire. However from your; /archives//html/RFI/2006-11/msg00020.html (8,979 bytes)
6. Re: [RFI] IN-band Filters (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 07 Nov 2006 17:30:40 -0700; That is by far your best solution. As the architect of some competitively scoring FD stations, I agree with others who have noted that stubs don t have nearly enough Q, and that heroic measures are n; /archives//html/RFI/2006-11/msg00021.html (7,695 bytes)
7. Re: [RFI] IN-band Filters (score: 1): Author: "Jim P" <jvpoll@dallas.net>; Date: Tue, 7 Nov 2006 22:11:58 -0600; Stubs? Low Q? What are you using - RG58? Q, related to cable loss, is much reduced for the larger diameter coaxial cables, with measured Q's of over 1000 obtainable with 'stubs' made of Heliax at Six; /archives//html/RFI/2006-11/msg00022.html (9,306 bytes)
8. Re: [RFI] IN-band Filters (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 8 Nov 2006 06:00:06 -0500; I replied in the context of the question, HF filters. I have some 2 meter duplexers that work very well at 600kHz spacing, but they aren't quite practical to scale for 80 meter for the next field da; /archives//html/RFI/2006-11/msg00023.html (9,212 bytes)
9. Re: [RFI] IN-band Filters (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 8 Nov 2006 08:09:29 -0500; Most good capacitors are far above what you can do with the inductor. The highest Q reasonable size inductors I have ever measured just approach Q=1000. Those are large transmitting inductors used i; /archives//html/RFI/2006-11/msg00024.html (8,949 bytes)
10. Re: [RFI] IN-band Filters (score: 1): Author: "Randy" <hamradio@oz.net>; Date: Wed, 8 Nov 2006 09:30:40 -0800; I sure agree with Jim. I have an IC746Pro and an IC756Pro3, both of which I use a lot and like really well (ordinarily). But last field day on 20 cw there was a constant S-9 level of hash between sig; /archives//html/RFI/2006-11/msg00025.html (9,360 bytes)
11. Re: [RFI] IN-band Filters (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Wed, 8 Nov 2006 21:15:11 -0800 (PST); Thanks to everyone for the suggestions. Unfortunately, with conflicting opinions, I feel I'm not much closer than I was with my original post. After I posted, I learned of a book titled, "Managing In; /archives//html/RFI/2006-11/msg00026.html (8,724 bytes)

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