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Total 6 documents matching your query.

1. [RFI] What antennas are good for HF DFing? (score: 1): Author: "Frank N. Haas" <kb4t@arrl.net>; Date: Sat, 12 Feb 2005 22:18:59 -0500; Dear RFI List: I find myself spending a great deal of time attempting to locate interference in the range of 500 KHz to 8 MHz. Most of these signals originate from switching power supplies or electro; /archives//html/RFI/2005-02/msg00059.html (7,892 bytes)
2. RE: [RFI] What antennas are good for HF DFing? (score: 1): Author: "Cortland Richmond" <ka5s@earthlink.net>; Date: Sat, 12 Feb 2005 19:58:35 -0800; A small loop, although not very sensitive, when coupled with modern radios (more than sensitive enough with a "real" antenna) is a good tool for tracking down HF and even lower frequency interference; /archives//html/RFI/2005-02/msg00060.html (9,931 bytes)
3. RE: [RFI] What antennas are good for HF DFing? (score: 1): Author: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>; Date: Mon, 14 Feb 2005 05:38:23 +0000; Frank, just an idea: maybe a powdered iron rod with as many turns of wire around it as possible (i.e. a loop stick antenna, like what is found in most medium wave AM rx but bigger) would work? the lo; /archives//html/RFI/2005-02/msg00065.html (10,223 bytes)
4. [RFI] What antennas are good for HF DFing? (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Mon, 14 Feb 2005 14:31:32 +0000 (GMT); You can use either a loop or a ferrite rod antenna. The performance will be quite similar. The sensitivity will be greatly improved if you use a tuned loop, and that may or may not matter in your par; /archives//html/RFI/2005-02/msg00069.html (10,550 bytes)
5. Re: [RFI] What antennas are good for HF DFing? (score: 1): Author: "Jim P" <jvpoll@dallas.net>; Date: Mon, 14 Feb 2005 09:34:16 -0600; "Ferrite rod antennas are quite tricky to get working properly - you need the highest permeability rod possible, _but_ the loss must be low at your operational frequency. Most medium wave rods will w; /archives//html/RFI/2005-02/msg00070.html (14,849 bytes)
6. Re: [RFI] What antennas are good for HF DFing? (score: 1): Author: "Jim P" <jvpoll@dallas.net>; Date: Mon, 14 Feb 2005 10:57:47 -0600; Turns out one of these Sears Model 2278 4-band AM/SW/FM "portables" that I described is currently listed on eBay: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=15051&item=5751745814 &rd=1 No; /archives//html/RFI/2005-02/msg00071.html (8,859 bytes)

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