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Re: [Amps] 3-500z - intermittent filament

To: g3rzp@g3rzp.wanadoo.co.uk
Subject: Re: [Amps] 3-500z - intermittent filament
From: "Mike McCarthy, W1NR" <lists@w1nr.net>
Date: Fri, 09 Feb 2007 09:30:46 -0500
List-post: <mailto:amps@contesting.com>
Peter Chadwick wrote:
> There are some higher temperature 'soft solders' around, which don't require 
> the red heat of hard solder. From memory, something called 'comsomal' or 
> similar is about a 300 degree C or so solder. Personally, I much prefer to 
> add cooling air, and use ordinary solder with a heat sink to keep the seals 
> cool.
> 73
> Peter G3RZP
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>
>
>   
Pb90 (90% lead) solder is about 300 C.  I have had good luck with "Sb5" 
alloy which is 95% tin and 5% antimony.  It is not the highest of 
melting points at about 240 C but much higher than 60/40 at 185 C .

Mike, W1NR

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