>
>> For <100MHz, Ag-plating is of no value other than to prevent oxidation of
>> the Cu. I polish Cu tank conductors with fine steek wool and coat them
>> with clear urehane varnish. They look ok years later. The same varnish
>> is also good for coating HV-RFC's to prevent wire rattle during
>> modulation.
>
>Any dielectric lowers Q of RF coils, especially when turns are close spaced
>and the coil is not very long with small diameter or when reactance is high.
>
>Steel wool may leave residue
Only a problem for those who don't wipe.
>and is a problem in electronics workshops,
>steek wool may be ok. Never used it or urehane.
>
For operation of an amplifier in the same building with a gas appliance,
varnished Cu is better than Ag-plating because it won't form a sulphide
from the gas-odorant like Ag does .
>73 Tom
>
>
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>
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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