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April 29th 09, 12:28 AM posted to rec.radio.amateur.antenna

Owen Duffy Owen Duffy is offline

Owen Duffy is offline

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Restoring a Hy-Gain Yagi...

JIMMIE wrote in news:9b6a811c-4f7a-4686-a503-
:

....
I figure steel wool would work fine for the aluminum tubing, I know
how to test the traps, but I am wondering whether to use stainless

If you brush aluminium with a material, there is a tendency for the
material to become embedded in the surface.

Stainless steel is widely used to brush aluminium clean before welding, and
with minimum degradation. I would not use steel wool. Non metallic
scrubbers may embed non-conductive material in the surface, frustrating low
resistance connection between clamped surfaces.

I have found the little Dremel #530 stainless wheel brush handy for scratch
cleaning the inside of mating tubes, although limited in reach. I haven't
tried, but the flexible shaft adapter might give good reach into larger
diameter tubes. For the outside, I just use a stainless scratch brush.

Owen

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