If you check in any Handbook of Chemistry and Physics, you will see that
there is very little absolute difference in conductivity between copper and
silver. There may be positive attributes to silver plating when used in
radio circuits, but an significant decrease in resistance isn't one of them.
BTW - Do you know that during WWII, silver was used for the electrical
wiring in the Hanford, WA plant for the production of plutonium. Copper was
needed for the war effort and the US Mint had a large quantity of silver.
After the war the wiring was replaced and the silver returned to the Mint.
For the same reason most 1943 5 cent pieces were made of silver rather than
nickel. After the war, these coins were pulled from circulation.
History lesson for today
73
David
KC2JD
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On
Behalf Of R.Measures
Sent: Thursday, February 02, 2006 5:32 AM
To: peter.voelpel
Cc: 'Amps'
Subject: Re: [Amps] Pi vs Pi-L
Thanks for saying it, Peter. One of the more interesting things about
VHF is that a conductor's surface area has more to do with Q than does
it's S/cm^3 conductivity. For example, at 1Hz, Ni-Cr alloys have about
50x more resistance than Ag or Cu, however, at 50MHz, they only have
about 5.5x more resistance. This realization is important when
designing a low-Q VHF suppressor -- i. e., one that will substantially
reduce VHF amplification in an HF amplifier by reducing the VHF Rp seen
by the anode. (Rp = parallel-equivalent R) .
end
On Feb 1, 2006, at 10:48 AM, peter.voelpel wrote:
>
> Mike,
>
> How much better will be Q and how much less will be losses
> by silverplating HF tank components?
> On 2m amps I measured no difference at all before and after plating
>
> 73
> Peter
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On
>
> Silver plating of the tank components will help Q and reduce losses as
> well.
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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