"Irv Finkleman" wrote in message ...

Here's a situation I haven't encountered before
and which I know little about.

I am building a magnetic loop antenna and have
an assembly which includes a capacitor and drive motor ideally suited
for the antenna. My problem is that the assembly is welded to an
aluminum mount. I want to attach a copper tubing loop to the mount
which will connect the loop to the motor driven capacitor.

My concern is the matter of dissimilar metals i.e. copper and aluminum
being joined. I would prefer to be able to bolt the assembly to the
copper tubing using star washers to reduce the joint resistance.

Here are my concerns:
1. What about rectification at the dissimilar metals joint? Is it going
to cause problems? Is it of any real concern?

3. Can the copper be welded to the aluminum mount for better joint
conduction? This is a last resort for me as it would mean taking the
assembly to a place where the welding, if possible, could be done.

Thanks in advance for any comments or suggestions which would be greatly
welcomed.

================================================== ====

There is a paste called Anti-Seize Lubricant. While the tube I have
contains material that is NON-conductive, the conductive material is
available. See:

conductive anti-seize compound

on google.com and see what you think of it. The US Navy specifies it for
certain topside uses.

I also tried that search at amazon.com. Some success but be cautious; even
with that word, not all the Amazon offerings were actually conductive.

"Sal"