I had originally replied to KG2V's query offlist, but after reading other
replies I decided to post my reply to the entire list to share my concerns
about using Aluminum in this application.
-----------
Since I've been bit as the result of an insulating oxide layer on an
Aluminum connection, I wouldn't recommend it for your ground buss. I
use copper, but since it is relatively soft, I don't count on tapped
threads, I use a nut on the backside. If it's heavy enough so that it
is mechanically robust, then it's probably sufficient electrically.
-Mike-
>________________________________
> From: "n0tt1@juno.com" <n0tt1@juno.com>
>To: Charlie@TheGallos.com; rfi@contesting.com; TowerTalk@contesting.com
>Sent: Thursday, March 20, 2014 1:51 PM
>Subject: Re: [TowerTalk] [RFI] Back of desk grounding buss
>
>
>FWIW, I just use a 1/8" thick x 3/4" wide aluminum bar
>stock from the hardware store. Goes along the back
>of the desk (near the top) and is periodly tapped for 8/32 screws
>to accept AL/CU rated "spade" lugs that connect to the
>various equipment "boxes" with ~1/4" braid. Then the strip is
>connected to the station ground. Works for me.
>
>73,
>Charlie, N0TT
>
>On Thu, 20 Mar 2014 13:53:19 -0400 Charlie Gallo <Charlie@TheGallos.com>
>writes:
>> Hey Gang,
>> Sort of antenna, sort of RFI, more safety..
>>
>> I've decided my back of desk grounding situation needs to be
>> improved
>>
>> Now, we all know the standard is a nice, thick copper buss.
>> Question is, how thick? - this will then be run down to the
>> panel/ground rod
>>
>> Is Brass/Aluminum/Copper PIPE a valid alternative? If aluminium,
>> again, how large (I normally have round up to about 3" diameter
>> sitting in the shop, as well an AL plate (various sizes, 3/16 thick
>> up to 6" wide is everyday, and I have angle up to 5" wide legs, 1/4"
>> thick around, and blocks up to 2" thick and 4" wide hanging around
>>
>> I intend to silver braze most of my connections, but obviously that
>> won't work to an Al plate, That I'd drill, tap, and either use
>> studs with nuts, or screws
>>
>> Again, we aren't talking the wall pass through here, but the buss at
>> the back of the desk
>>
>> --
>> 73 de KG2V - Charles Gallo
>> Quality Custom Machine-shop work for the radio amateur (sm)
>>
>> _______________________________________________
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>> RFI@contesting.com
>> http://lists.contesting.com/mailman/listinfo/rfi
>>
>
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