[Elecraft] K3/KPA500/KAT500 SWR problem

[Michael]

let us not forget that dissimilar metal is making a thermal couple junction point and inducing a voltage on the line also.

73, Michael - N8NOC

K1-4   #3046
K3/10 #6596
KX3    #1573


On Dec 30, 2013, at 3:29 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:

Hmmm,  An aluminum bar tied to a copper wire!  Be aware that there will be oxidation at the junction point due to dissimilar metals unless special bonding is used to slow (but not stop) the oxidation.

Just something to bear in mind.

73,
Don W3FPR
On 12/30/2013 3:23 PM, KD0Q-Glenn wrote:
> Everything in the shack is grounded to an aluminum bus bar across the back of the operating table which is tied with #6 solid copper to the same point as the tower and AC Main grounds.
> 
> Just for reference, the antenna is a 260ft OCF Inverted Vee at 75 ft using a Balun Designs #4115ocf 4:1/Choke combination balun. Coax shield is grounded at the top and bottom of the tower.
> 

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