Re: Control Box

• To: tesla-at-pupman-dot-com
• Subject: Re: Control Box
• From: "Barton B. Anderson" <tesla123-at-pacbell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Thu, 13 Apr 2000 08:12:41 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

>
> Original Poster: "Marc metlicka" <mystuffs-at-orwell-dot-net> 
>  

Hi Marc, 

Some transformers used for coiling are not current limited such as pole pigs
and potential transformers. Therefore, external current limiting is required
and a variac is just one common option. Another common option is the use of
welders and recently winding your own current limiting transformer. The variacs
are also useful in a variety of other areas as a means of varying input
voltage. It's not a "must" - just a handy device in coiling. 

Bart 
>
> i was wondering what the "must" of having a variac is in coiling? if 
> it's to drop the voltage, i don't understand why. the transformers are 
> built for 120v. if it's to raise the voltage over 120v, then why cry 
> when you loose a transformer. if its for isolation, there are isolation 
> transformers out there for 10.00- 30.00 new. please enlighten me.   mem

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