[TowerTalk] Grounding an Alumatower

[Bert]

Hi John,

According to the Galvanic Corrosion Table, stainless steel and aluminum 
alloys
are in the green region of the chart and should be safe.

I think this is the best practice available, even if it's not perfect.

Bert VE3NR



On 5/11/2020 7:54 PM, john at kk9a.com wrote:
> I am a little confused by this practice. There are many types of stainless
> steel which are all over the galvanic table. Looking at the following table
> I am not seeing the advantage to using a generic stainless steel shim
> between the tower and the copper wire:
> http://structx.com/Material_Properties_001.html .  Perhaps a sacrificial
> aluminum flashing shim would be a better choice?
>
> John KK9A
>
>
>
> Phil W5BVB wrote:
>
> Get some thin stainless sheet....DX Engineering sells it.
> Wrap it around the tower leg and then put your grounding
> clamp on it.  This is what I do even with my galvanized
> tower.  Since it is aluminum, you might put some of that
> (I can't remember the name) conductive paste meant for
> aluminum antennas between the SS and the tower let.
>
> good luck, 73, Phil  W5BVB
>
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