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Re: [Amps] Cleaning air-wound coils

To: amps <>
Subject: Re: [Amps] Cleaning air-wound coils
From: Ron Youvan <>
Date: Wed, 05 May 2010 09:40:39 -0400
List-post: <">>
Ron Youvan wrote:

>  >> How do you get the tarnish off of miniductor or airdux-type coils wound
>  >> with tinned wire?

>> The problem is keeping it looking fresh without affecting performance. 
>> Maybe a very light coat of clear acrylic if the RF doesn't get them 
>> too warm.

>> If you're real talented maybe a fast dip in a solder pot after 
>> cleaning or even silver plating.

>   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 would restore 
> the original look.  (lacking a silver coating)

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 coil material is a very bad 
idea when it 
comes to high power  from:
    Ron  KA4INM - The next election, I know what is going to happen, I'm going 
to help.
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