To: | Tom Rauch <w8ji@contesting.com>,"Michael Tope" <W4EF@dellroy.com>, <K7LXC@aol.com>,"\"Dudley Chapman\"" <chief@thechief.com>,"TowerTalk" <towertalk@contesting.com> |
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Subject: | Re: [TowerTalk] Lightning protection questions. |
From: | Jim Lux <jimlux@earthlink.net> |
Date: | Tue, 27 Jul 2004 11:45:33 -0700 |
List-post: | <mailto:towertalk@contesting.com> |
At 02:16 PM 7/27/2004 -0400, Tom Rauch wrote:> What alloy are you using, Tom. Most of the stuff you can buy at > home box stores is for plumbing applications (96%Tin, 4% Silver). Just looking through page 3163 of McMaster-Carr... Looks like there are cadmium containing and non-cad containing varieties. Antenna work is probably outside in good ventilation, so the cad-containing kinds are probably ok. The silver content ranges from 35-60%. Since you're paying for the silver, you probably want the low silver, high copper alloys (so called High Fill) 35% Ag, 26 Cu, 21 Zn, 18 Cd. Melts at 1125 to 1295... The higher silver alloys (like 45%) melt a bit lower 1125 to 1145, and aren't much more expensive. Then, there's things like silver/copper/phosphorus blends for brazing copper... 15/80/5 or 5/89/6... they melt at temps up to 1500F. _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk |
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