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Total 21 documents matching your query.

1. [Amps] Cleaning air-wound coils (score: 1): Author: Vic K2VCO <vic@rakefet.com>; Date: Sun, 02 May 2010 19:36:06 -0700; How do you get the tarnish off of miniductor or airdux-type coils wound with tinned wire? It's hard to get steel wool in between the turns! -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ _________; /archives//html/Amps/2010-05/msg00019.html (6,380 bytes)
2. Re: [Amps] Cleaning air-wound coils (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 3 May 2010 08:57:36 -0400; Comet and a toothbrush. The problem is keeping it looking fresh without affecting performance. Maybe a very light coat of clear acrylic if the RF doesnt get them too warm. If youre real talented mayb; /archives//html/Amps/2010-05/msg00025.html (8,358 bytes)
3. Re: [Amps] Cleaning air-wound coils (score: 1): Author: "David Jordan" <Wa3gin@comcast.net>; Date: Mon, 3 May 2010 09:04:27 -0400; Brasso works great and leaves a film that helps reduce oxidation of the silver plating. Just finished restoration of an HT-41...looks brand new. 73, Dave Wa3gin Comet and a toothbrush. The problem is; /archives//html/Amps/2010-05/msg00026.html (9,211 bytes)
4. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 03 May 2010 09:13:40 -0400; Steel Wool should never be used on wood or anything that you try to "pretty up" because you will put micro-slivers of steel in your project that will eventually rust and turn brown, even under varni; /archives//html/Amps/2010-05/msg00027.html (7,992 bytes)
5. Re: [Amps] Cleaning air-wound coils (score: 1): Author: "Paul Kraemer" <elespe@lisco.com>; Date: Mon, 3 May 2010 08:52:19 -0500; I 've used a wattered down slurry of Soft Scrub applied with a soft paint brush. Work it around with the brush and lots of cold water rinse and warm air (hair dryer) dry. Made some old ceramic hi pow; /archives//html/Amps/2010-05/msg00030.html (8,612 bytes)
6. Re: [Amps] Cleaning air-wound coils (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 3 May 2010 10:15:18 -0400; Since when is a stock Miniductor silver plated? They are copper wire with a very thin tin plate. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http:/; /archives//html/Amps/2010-05/msg00031.html (10,540 bytes)
7. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Mon, 03 May 2010 10:29:15 -0400; Although they are handy, they are also kinda pricey for a piece of heated wire stuck into strips of plastic. 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@con; /archives//html/Amps/2010-05/msg00032.html (11,263 bytes)
8. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Mon, 03 May 2010 10:29:32 -0400; Although they are handy, they are also kinda pricey for a piece of heated wire stuck into strips of plastic. 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@con; /archives//html/Amps/2010-05/msg00033.html (7,792 bytes)
9. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Jim Barber <audioguy@charter.net>; Date: Mon, 03 May 2010 11:38:01 -0700; High-temp powder coating might be interesting to try as well. Several powders are available that are good for over 500 degrees F after curing. They're used on exhaust systems, ovens, etc. If the coil; /archives//html/Amps/2010-05/msg00034.html (10,209 bytes)
10. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 03 May 2010 14:54:39 -0400; I think part of the problem with these coils is frequently the thin tin coating is scratched and rubbed off. (copper shows through) A real good cleaning followed by one of the "cold tin" platings wo; /archives//html/Amps/2010-05/msg00035.html (8,513 bytes)
11. Re: [Amps] Cleaning air-wound coils (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 3 May 2010 15:43:00 -0400; How do you propose to keep the polystyrene supports from turning into a puddle at 500F ? Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.c; /archives//html/Amps/2010-05/msg00037.html (10,919 bytes)
12. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Jim Barber <audioguy@charter.net>; Date: Mon, 03 May 2010 13:39:19 -0700; Good point, since the original question was about B&W coils. What I don't know is whether the curing process would get the plastic hot enough long enough to matter. Standard polycarbonate (used in th; /archives//html/Amps/2010-05/msg00038.html (12,264 bytes)
13. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Wed, 05 May 2010 09:40:39 -0400; After thinking about miniductor coils I realized: (skin effect) metal resistivity silver 106 copper 100 annealed copper 89.5 hard drawn gold 65 tin 13 this makes me think the tin coated miniductor co; /archives//html/Amps/2010-05/msg00057.html (9,292 bytes)
14. Re: [Amps] Cleaning air-wound coils (score: 1): Author: John Wilson <amps@grebe.plus.com>; Date: Wed, 05 May 2010 15:07:35 +0100; Has anyone done any tests on the comparative Q between Silver plated, enamelled and tinned wire coils? I've always felt that factory enamelled wire stood a much better chance of retaining a good Q fo; /archives//html/Amps/2010-05/msg00058.html (9,977 bytes)
15. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Dan Zimmerman N3OX <n3ox@n3ox.net>; Date: Wed, 5 May 2010 12:31:27 -0400; W0QE found that there wasn't a substantial difference between shiny copper and terribly corroded copper: http://www.bnk.com/w0qe/inductor_Q_tests.html Metallic platings should be analyzed based on t; /archives//html/Amps/2010-05/msg00060.html (9,759 bytes)
16. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Larry Benko <xxw0qe@comcast.net>; Date: Wed, 05 May 2010 10:40:59 -0600; Thanks for the plug Dan. I did the tests you mentioned primarily at 28MHz a couple years ago. Increasing the wire size 1 gauge is better than silver plating assuming you have adequate spacing between; /archives//html/Amps/2010-05/msg00061.html (10,463 bytes)
17. Re: [Amps] Cleaning air-wound coils (score: 1): Author: Jim Barber <audioguy@charter.net>; Date: Wed, 05 May 2010 10:11:35 -0700; Based on everthing presented in this thread, then, at HF would a *very* thin layer of plated gold decrease performance in any significant way? If not, that might be a long-term method to keep things; /archives//html/Amps/2010-05/msg00062.html (11,620 bytes)
18. Re: [Amps] Cleaning air-wound coils (score: 1): Author: "David Cutter" <d.cutter@ntlworld.com>; Date: Wed, 5 May 2010 18:15:33 +0100; "Radio Frequency Performance of Electroplated Finishes" by AM Fowler and an addendum page are ancient manuscripts that might bear looking at again. I'll send them to you if you can't find them via Go; /archives//html/Amps/2010-05/msg00063.html (10,949 bytes)
19. Re: [Amps] Cleaning air-wound coils (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 5 May 2010 14:47:57 -0400; Silver plating ads no benefit at frequencies below around 250 mHz. I have 1500W amps on 144 and 222 using copper lines and the efficiency measures over 60% on both. Getting the tuning and loading opt; /archives//html/Amps/2010-05/msg00064.html (11,826 bytes)
20. Re: [Amps] Cleaning air-wound coils (score: 1): Author: ToddRoberts2001@aol.com; Date: Wed, 5 May 2010 20:23:57 EDT; Based on everthing presented in this thread, then, at HF would a *very* thin layer of plated gold decrease performance in any significant way? If not, that might be a long-term method to keep things; /archives//html/Amps/2010-05/msg00065.html (8,823 bytes)

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