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Total 9 documents matching your query.

1. Topband: K9AY-Loop ? (score: 1): Author: DM4iM <hamradio@vr-web.de>; Date: Tue, 13 Jan 2009 12:01:58 +0100; Topbanders, i recently built a K9AY-Loop ( switchable N/S E/W on a single Mast), but i am not satisfied with it's performance. I notice a good difference in signal when switching from the N/S loop to; /archives//html/Topband/2009-01/msg00115.html (6,655 bytes)
2. Re: Topband: K9AY-Loop ? (score: 1): Author: K4SAV <RadioIR@charter.net>; Date: Tue, 13 Jan 2009 15:51:15 -0600; It sounds like your N/S loop has a problem. You should have a much better F/B than front to side. Check out everything associated with the NS loop, the termination resistor, the relay, and the wiring; /archives//html/Topband/2009-01/msg00121.html (7,205 bytes)
3. Re: Topband: K9AY-Loop ? (score: 1): Author: "n4is" <n4is@bellsouth.net>; Date: Tue, 13 Jan 2009 19:25:50 -0500; Jerry I'm quite sure there is no problem with your K9AY-Loop itself; however I am 100% sure why it is not working. The main reason RX antennas do not work is because the proximity with a resonant TX; /archives//html/Topband/2009-01/msg00123.html (9,335 bytes)
4. Re: Topband: K9AY-Loop ? (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 13 Jan 2009 20:25:11 -0800; I agree the CHOKE is critical, and it should be brute force (that is, a design goal of 5Kohms at frequencies of interest). I do NOT agree that the ground is needed beyond for whatever it takes to mak; /archives//html/Topband/2009-01/msg00125.html (7,482 bytes)
5. Re: Topband: K9AY-Loop ? (score: 1): Author: "n4is" <n4is@bellsouth.net>; Date: Wed, 14 Jan 2009 08:04:39 -0500; agree that the ground is needed beyond for whatever it takes to make the antenna work.<< Hi Jim That's a good point. What is an antenna? Simple question but difficult answer, let's see a 6m yagi at; /archives//html/Topband/2009-01/msg00127.html (9,970 bytes)
6. Re: Topband: K9AY-Loop ? (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Wed, 14 Jan 2009 09:17:40 -0800; YES. YES. ANY wire will act as an antenna in the presence of excitation, depending on its length and the frequency. I like to think of chokes in wires like this as the equivalent of an egg insulator; /archives//html/Topband/2009-01/msg00128.html (11,622 bytes)
7. Re: Topband: K9AY-Loop ? (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Wed, 14 Jan 2009 13:47:49 -0800; The bead may make you feel better, but that's all its doing. It takes a resistive impedance on the order of 1K to do anything useful, which requires a lot of TURNS through a lossy ferrite! The bigges; /archives//html/Topband/2009-01/msg00129.html (7,959 bytes)
8. Re: Topband: K9AY-Loop ? (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Wed, 14 Jan 2009 13:57:18 -0800; Yes, looking for resonances with a dipper or equivalent is certainly a good idea. And it's quite helpful to do your listening for noise with a portable radio that you can tune to a frequency where yo; /archives//html/Topband/2009-01/msg00130.html (8,490 bytes)
9. Re: Topband: K9AY-Loop ? (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Thu, 15 Jan 2009 01:10:05 -0800; Yeah, it scares off elephants too. Proof -- you aren't troubled by elephants, so it must work. If you still believe that it works, I suggest that draw a circuit diagram with values, showing that ther; /archives//html/Topband/2009-01/msg00138.html (8,346 bytes)

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