Has anyone measured corroded copper inductor Q vs. shiny new copper at
HF frequencies?
Specifically, I wonder if there'd be any practical benefit to
polishing and coating a 3/4" copper pipe transmitting magnetic loop
with coil varnish?
The capacitor is a Jennings vacuum variable and the silver-plated cap
clamps have been soldered to the loop using solid silver plated copper
strap, so I don't have a particularly lossy capacitor arrangement.
I also know that shiny new copper vs. shiny new silver wouldn't make
much difference. What I don't know is the conductivity penalty of
corroded copper.
The loop is just a fun experiment since I had the capacitor burning a
hole in my junkbox but I'm interested in seeing how well I can get it
to work vs. my larger antennas.
73,
Dan
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