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1. [Amps] teeny copper strap (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Wed, 07 Jun 2006 08:37:48 -0400; Before I mail order some copper flashing or go to one of the lightning protection outfits for far more than I'll need, is there any non-radio source of appropriate stuff for grounding my SB-220 grids; /archives//html/Amps/2006-06/msg00194.html (6,615 bytes)
2. Re: [Amps] teeny copper strap (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Wed, 7 Jun 2006 14:10:09 +0100; It's certainly thick enough to carry the RF current. Thanks to the skin effect, even very thin copper foil in a 5mm (3/16in) width will carry 1500W at HF without getting warm (that's 5.5A into 50 ohm; /archives//html/Amps/2006-06/msg00195.html (8,432 bytes)
3. Re: [Amps] teeny copper strap (score: 1): Author: "Cecil Acuff" <chacuff@cableone.net>; Date: Wed, 7 Jun 2006 08:38:06 -0500; Pete, You might have luck by finding a local copper rain gutter manufacturer or some outfit that does copper flashing on high end homes and businesses. I would expect you could pick up enough small s; /archives//html/Amps/2006-06/msg00196.html (8,545 bytes)
4. Re: [Amps] teeny copper strap (score: 1): Author: "Cecil Acuff" <chacuff@cableone.net>; Date: Wed, 7 Jun 2006 08:40:59 -0500; Pete, Another thought would be using 1/4" copper tubing scraps. You could flatten the ends or the whole thing if necessary... Another thought.... Cecil Acuff WB5VCE -- Original Message -- From: "Pete; /archives//html/Amps/2006-06/msg00197.html (8,394 bytes)
5. Re: [Amps] teeny copper strap (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Wed, 7 Jun 2006 09:51:31 -0400; I have been using copper flashing from Home Depot. They will cut just what you need, like a 12"x12" piece. Then bring it home and make strips with tin snips. Mike, W1NR ______________________________; /archives//html/Amps/2006-06/msg00198.html (7,999 bytes)
6. Re: [Amps] teeny copper strap (score: 1): Author: "W7RY" <w7ry@centurytel.net>; Date: Wed, 7 Jun 2006 07:07:00 -0700; Also try hobby stores. They have small sheets (~4"X6") of copper, brass and aluminum that you can cut into strips. The display also has small pieces of tubing as well. And possibly shops that special; /archives//html/Amps/2006-06/msg00199.html (9,228 bytes)
7. Re: [Amps] teeny copper strap (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Wed, 07 Jun 2006 10:09:26 -0400; The length is a problem with the SB-220's layout - I had a short one in there but a couple of arcs later.... Interesting idea - I thought the CW about the SB-220 was that it had a transformer that wa; /archives//html/Amps/2006-06/msg00200.html (9,357 bytes)
8. Re: [Amps] teeny copper strap (score: 1): Author: Vic K2VCO <vic@rakefet.com>; Date: Wed, 07 Jun 2006 08:31:27 -0700; I bought some small quantities of copper (they also have brass) sheet at a hobby shop. I use this a lot for model train projects! They have different thicknesses. I would suggest using some that's th; /archives//html/Amps/2006-06/msg00203.html (7,912 bytes)
9. Re: [Amps] teeny copper strap (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Wed, 7 Jun 2006 10:51:00 -0500; I cut my copper flashing with a paper cutter; the big green board with the big cutting blade on it. It makes professional looking strips. (((73))) Phil Clements, K5PC _______________________________; /archives//html/Amps/2006-06/msg00204.html (7,841 bytes)
10. Re: [Amps] teeny copper strap (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Wed, 7 Jun 2006 17:55:31 +0100; Most amps have enough space to mount two long resistors in a "V" configuration, so the two ends are a short distance apart while the mid-point is tucked away somewhere safe. The SB-220 has a separate; /archives//html/Amps/2006-06/msg00206.html (10,825 bytes)
11. Re: [Amps] teeny copper strap (score: 1): Author: R L Measures <r@somis.org>; Date: Thu, 8 Jun 2006 09:34:38 -0700; Tune-C arcs are good news compared to bandswitch arcs. The fil xfmr is current limited. The HV xfmr is not because if it were current limited, the HV regulation would be worse than terrible. R L MEAS; /archives//html/Amps/2006-06/msg00232.html (10,544 bytes)
12. Re: [Amps] teeny copper strap (score: 1): Author: "Roy Koeppe" <royanjoy@ncn.net>; Date: Fri, 9 Jun 2006 17:16:25 -0500; Concerning, " ...is there any non-radio source of appropriate stuff for grounding my SB-220 grids?...(etc.)" Sorry, but I have to bring this up. It seems to me what's good for the goose is good for t; /archives//html/Amps/2006-06/msg00244.html (8,388 bytes)
13. Re: [Amps] teeny copper strap (score: 1): Author: R L Measures <r@somis.org>; Date: Sat, 10 Jun 2006 02:04:15 -0700; So it would seem, Roy. In my SB-220, using a dip-meter, I madea before and after resonance f comparison between direct-grounding the grid pins and grounding them with caps. Not only was the differenc; /archives//html/Amps/2006-06/msg00251.html (9,514 bytes)

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