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.
Dan Schaaf
K3ZXL
"In the Beginning there was Spark Gap"
www.k3zxl.com
----- Original Message -----
From: "Barry Fox" <foxbw@comcast.net>
To: <towertalk@contesting.com>
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
> around
> 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
> loss.
> Thanks for any opinions,
> Barry - W1HFN
>
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