It is not the power that is of concern. 1 watt or 1000 watts will see the
same resistive connection if there is corrosion.
I generally tin the copper with solder, then clamp it to the aluminum with
either stainless hose clamps or stainless screws.
"In the Beginning there was Spark Gap"
----- Original Message -----
From: "Barry Fox" <firstname.lastname@example.org>
Sent: Saturday, April 10, 2010 11:06 PM
Subject: [TowerTalk] TH6 dissimilar metals query
> In the process of rebuilding a TH6 I broke the aluminum clip which shorts
> the Beta match wires to the boom. I can make a replacement from copper,
> but wonder if that is a good idea. A stainless steel screw will hold the
> copper clip to the aluminum boom and the copper clip will be wrapped
> and bolted to the aluminum Beta match wires and fastened with a stainless
> steel nut and bolt.
> Will all these dissimilar metal junctions cause any problems? I do not
> own an amplifier, so the most RF it will see is 100 watts, minus feed line
> Thanks for any opinions,
> Barry - W1HFN
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