For insight about silver plating see: http://k6mhe.com/n7ws/Plating.pdf
I could tell a war story about nickle under gold on an X-Band waveguide IMPATT
diode test oscillator.
Wes N7WS
On 2/27/2019 3:11 PM, jimlux wrote:
And how to get something silver plated once out of high school chemistry
class I don't know?
- Silver plating doesn't affect the RF resistance very much unless the silver
is VERY thick - particularly at 2 MHz.
Copper skin depth at 2 MHz is 1.82 mils (46.1 microns)
Silver skin depth at 2 Mhz is 1.77 mils (44.9 micron)
Resistivity is 1.59 for silver, 1.68 for copper
QQ-S-365, ASTM B700 silver plating thickness is .05 mil, 13 microns
Complicating this is there's usually a nickel flash/strike plate under the
silver, to prevent silver/copper migration, and nickel is magnetic and lossy.
Maybe you might want to put a silver plating on the inside of Aluminum
waveguide at high frequencies.
But for low frequencies, you're probably better off just making your conductor
6% bigger in diameter and that will provide lower overall AC resistance.
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