Re: Variac Rewinding ?
Subject: Re: Variac Rewinding ?
Date: Thu, 12 Jun 1997 01:36:55 -0400 (EDT)
From: richard hull <rhull-at-richmond.infi-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
At 07:55 AM 6/11/97 -0500, you wrote:
>Subject: Re: Latest magnifier results (variac)
> Date: Wed, 11 Jun 1997 19:34:39 +1000
> From: Peter Electric <elekessy-at-macquarie.matra-dot-com.au>
> To: Tesla List <tesla-at-pupman-dot-com>
>Tesla List wrote:
>> Subject: Re: Latest magnifier results (variac)
>> Date: Tue, 10 Jun 1997 23:58:20 -0400 (EDT)
>> From: richard hull <rhull-at-richmond.infi-dot-net>
>> To: Tesla List <tesla-at-pupman-dot-com>
>> Dood man Bert! Most folks would throw up their hands at a fused
>> variac. I
>> place a turn around value to begin with 20amp units and above. Smaller
>> units can often be purchased cheaper than the labor and hassle of
>> Plus the big 'uns give us folks with 5 thumbs on each hand a chance to
>> really stand a chance. 5 amp jobs are for watch makers!
>> Richard Hull, TCBOR
>Richard, I have scored a large variac rated at 100V input (I think its
>from Japan) and 20A output. Its not much use to me here in Aus because
>we only have 240V mains but you mention repairing these units. Would it
>be feasible for me to re-wind this unit with thinner wire and more turns
>for 240V operation?
>If so, how easy is it to wind wire neatly round a toroidal core?
>Any help would be most appreciated.
Rewinding a variac core from scratch is as close to impossible as
gets!! It would be a labor of love and the core for a 120v version
handle far less amps than your current one is rated at. The power level
could be about the same though, I would imagine.
R. Hull, TCBOR