Up to at least 2M it is only for cosmetics and doesnt improve performance.
I still use a 4CX250B cavity amp made from copper pipe and silver solder on
440 MHz FM and the 250W output hasnt changed since I built it in 89.
Carl
KM1H
----- Original Message -----
From: "peter chadwick" <g8on@fsmail.net>
To: "MU 4CX250B" <4cx250b@miamioh.edu>; "Fuqua Bill L" <wlfuqu00@uky.edu>
Cc: <amps@contesting.com>
Sent: Friday, February 28, 2014 11:37 AM
Subject: Re: [Amps] Cool Amp Silver Plating
Whether it's worthwhile electrically depends on the frequency. At 144MHz,
the skin depth is 0.2 mil (0.0002 inch) and you need about 5 skin depths
to keep 99% of the current in the silver, or about 1 mil i.e. 0.001 inch.
At 1.8 MHz, you need about 0.009 inches for 5 skin depths....
But it looks a lot nicer than oxidised copper.
73
Peter G3RZP
========================================
Message Received: Feb 28 2014, 03:48 PM
From: "MU 4CX250B" <4cx250b@miamioh.edu>
To: "Fuqua, Bill L" <wlfuqu00@uky.edu>
Cc: "amps@contesting.com" <amps@contesting.com>
Subject: Re: [Amps] Cool Amp Silver Plating
I've used Cool-Amp powder for many years. It works fine, is easy to
use. Seems non-toxic, although I always wear gloves. No ventilation
needed. I think the coating is thinner electroplated silver.
73,
Jim w8ZR
Sent from my iPhone
> On Feb 28, 2014, at 8:27 AM, "Fuqua, Bill L" <wlfuqu00@uky.edu> wrote:
>
> Take a look at this.
> http://www.saltlakemetals.com/SilverChloridePlating1.htm
> 73
> Bill wa4lav
>
> ________________________________________
> From: Amps [amps-bounces@contesting.com] on behalf of Hardy Landskov
> [n7rt@cox.net]
> Sent: Friday, February 28, 2014 9:42 AM
> To: amps@contesting.com
> Subject: [Amps] Cool Amp Silver Plating
>
> All,
> Has anyone used this power? If so, what is your opinion/facts of how
> your project turned out? Any special precautions needed?
> Thanks ahead of time.
> 73 Hardy N7RT
> _______________________________________________
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> _______________________________________________
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> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
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