[TCML] Re: Re: Tesla Digest, Vol 29, Issue 32 --- High Sensitivity/

[Russell L Thornton]

High Sensitivity/

Dave,
It is not entirely true that copper is not used for fasteners.  The 
electrical connect (threaded bolt) on your car engine starter is most 
likely copper.  At least everyone that I have taken apart has one.  Find 
someone with an engine lathe and cut your own bolts and nuts.  Getting the 
raw stock may be a secondary problem. 

Russell at the Cape,
go Discovery!!


Message: 1
Date: Tue, 30 Mar 2010 11:30:58 -0700
From: Dave Leddon <dave at leddon.net>
Subject: [TCML] Source for copper hardware
To: Tesla Coil Mailing List <tesla at pupman.com>
Message-ID: <20100330183857.3E48AFDF20 at chip1.pupman.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed

I've been trying to eliminate hot spots in the primary circuit of a 
relatively high current (~3000 amp) drsstc by replacing high 
resistance connection points with copper.  Even a one-inch length of 
3/8-inch brass bolt can generate enough heat to melt the solder right 
out of a terminal lug.  Which raise another interesting point, what 
about solder?  It has ten times the resistance of copper so maybe all 
lugs should be crimped.  I only soldered them because I don't own a 
crimper large enough to deal with #2 welding cable.  But I 
digress.  I've not had any success locating a source for copper nuts 
and bolts, probably because copper isn't strong enough to be consider 
a fastener, and so have been force to machine my own.  I would much 
rather just plunk down the credit card.  Does anybody know of a good 
source for copper hardware?

Dave
Pleasanton, ca


High Sensitivity/