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NNTP-Posting-Date: Tue, 17 Dec 2002 21:37:23 -0600
From: Barry Lennox
Subject: Re: welding a transformer core
Date: Wed, 18 Dec 2002 16:38:50 +1300
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Sounds like some serious BS here. This seemed wierd as I have been
using a rewound MOT for a welder, and it spends a fair amount of it's
time with no or an insignificant load on it. I had never noticed any
Anyway as a sanity check, I took another at random (I have a very
large pile of these, SWMBO reckons another microwave coming in the
door will sink the house!) and ran it for 15 mins with no load and
there is no significant heating that I can detect. When can I expect
I then run some horribly crude random welds (3mm E6013 at 120 Amps)
over the original one, Guess what, it spotwelds just the same and
still has not fried, or got even lukewarm.
Don't have any idea what it's characteristics are, but it's got a
Mitsubishi logo on it, and the text A600 476JP 8N 220 it that means
anything to anybody. It's about 3 x 3.5 x 4 inches.
PS Sounds a bit like an old tutor used to tell me: "Those who say it
can't be done, should get out of the way of those doing it!!"
On 17 Dec 2002 05:37:12 -0800, email@example.com (N. Thornton) wrote:
>firstname.lastname@example.org (Viktor Mikhailovich Polesov) wrote in message news:<email@example.com>...
>> There seems to be a bit of debate as to welding the core. If it is
>> going to cause a huge loss in efficiency, why isn't that the case with
>> the original weld?
>Microwave transformers are inefficient. Run one with no load and no
>fan and it'll be fried in minutes.
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