Why complicate things:
http://www.aircraftspruce.com/pdf/2009Individual/Cat09466.pdf
John
----- Original Message -----
From: "David E. Nelson" <david.nelson@pobox.com>
To: <aeroelectric-list@matronics.com>
Sent: Monday, October 06, 2008 7:54 PM
Subject: Copper buss-bar from copper tubing
> <david.nelson@pobox.com>
>
>
> Hi Bob,
>
> I'm having a heck of a time finding either brass or copper sheet/straps to
> make the contactor-to-contactor buss bars. The 'KS Engineering'
> (spelling?) display seems to have become quite rare in the likes of Lowes,
> Home Depot, and Ace Hardware.
>
> Looking around the shop, I was thinking of taking some 1/2" annealed (ie.
> soft) copper tubing and flattening it out in a vise w/ smooth jaws to make
> some ~3/4" "bar" with a thinkness of around .098" (I think the wall
> thinkness is .049, IIRC). I was then thinking of silver soldering brass
> washers though that that may be overkill.
>
> If my math is right, this comes out to something around 93500 CM which is
> somewhere between 1 and 0 AWG. While this may seem overkill, I chose 1/2"
> over 3/8" tubing to allow plenty of edge distance (a little over 1/4")
> around the 5/16" contactor bolts.
>
> Do you have any concerns of using this method?
>
> Thank you,
> /\/elson
>
>
>
