[Amps] Cool Amp Silver Plating

[Carl]

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 at fsmail.net>
To: "MU 4CX250B" <4cx250b at miamioh.edu>; "Fuqua Bill L" <wlfuqu00 at uky.edu>
Cc: <amps at 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 at miamioh.edu>
> To: "Fuqua, Bill L" <wlfuqu00 at uky.edu>
> Cc: "amps at contesting.com" <amps at 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 at uky.edu> wrote:
> >
> > Take a look at this.
> > http://www.saltlakemetals.com/SilverChloridePlating1.htm
> > 73
> > Bill wa4lav
> >
> > ________________________________________
> > From: Amps [amps-bounces at contesting.com] on behalf of Hardy Landskov 
> > [n7rt at cox.net]
> > Sent: Friday, February 28, 2014 9:42 AM
> > To: amps at 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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