[TowerTalk] Copper grounding bus bar

[Mark Robinson]

is that post or paste?

----- Original Message ----- 
From: "Gary Schafer" <garyschafer at comcast.net>
To: <towertalk at hidden-valley.com>; <towertalk at contesting.com>
Sent: Wednesday, 12 September, 2007 4:01 PM
Subject: Re: [TowerTalk] Copper grounding bus bar


> Aluminum will work just fine. There will not be enough difference in
> conductivity to matter. Just use a copper to aluminum past when mounting 
> any
> copper conductors.
>
> 73
> Gary  K4FMX
>
>> -----Original Message-----
>> From: towertalk-bounces at contesting.com [mailto:towertalk-
>> bounces at contesting.com] On Behalf Of Jeff Carter
>> Sent: Wednesday, September 12, 2007 2:46 PM
>> To: towertalk at contesting.com
>> Subject: Re: [TowerTalk] Copper grounding bus bar
>>
>> I've always wondered about that, skin effect being what it is and all.
>> Why
>> wouldn't aluminum be just as good in this particular application?
>> Considering cost, why wouldn't it be vastly better?
>>
>> I've never met anybody who was worried about the propagation velocity of
>> their
>> ground system.  Then again, I don't know everybody, either...yet.
>>
>> Jeff/KD4RBG
>>
>> On Wednesday 12 September 2007 15:38, Jim Lux wrote:
>> > Terry wrote:
>> > > I'm looking at copper sheet on these sites to be used as a SPG plate
>> > > about 16" x 16".  What would be the minimum thickness to be
>> > > "self-supporting" as opposed to laminating it on some substrate as
>> > > Polyphaser does?
>> > >
>> > > 73 de Terry KK6T
>> >
>> > unless you want to solder directly to the plate, why not use aluminum.
>> > It's a lot cheaper, much easier to work with (drilling thick copper is 
>> > a
>> > chore, tapping even more so, prepare to buy many spare taps and use 
>> > lots
>> > of lube.. soldering to a big sheet of thick copper would require a
>> > fairly high output torch, too).  I'd find it hard to believe that the
>> > conductivity difference would be significant (for DC & line frequency,
>> > the thickness of the aluminum helps, for RF, it's a big flat surface
>> > either way).  A wide variety of lugs are available, and a nice tapped
>> > hole in the aluminum will make fairly good contact.
>> >
>> > If you feel that the copper is important, slap a big piece of 
>> > copperclad
>> >   PC board material on top of the aluminum, or stick copper flashing 
>> > on.
>> >   You could also put copper foil tape on the aluminum in places where
>> > you think it's important. 3M makes a kind with conductive adhesive.
>> >
>> >
>> > _______________________________________________
>> >
>> >
>> >
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