[Amps] microwave transformers

[Hsu]

I had ever to contact with a microoven transformer manufacturer,the list price for 1000w microwave oven's only $10/ea. the core not hypersil and the the wire's material is  Al,Not Cu.
        73!Hsu
----- Original Message ----- 
From: "Herzog" <herzog at frontiernet.net>
To: "Ham-amps" <amps at contesting.com>
Sent: Thursday, March 12, 2009 9:06 AM
Subject: [Amps] microwave transformers


> RE:  Dittos  from all I have learned about MOTs about the only thing 
> they will
> do  correctly  is run a microwave oven. They have too few turns in the
> primary
> so the transformer runs hot and lossy, the magnetic shunts limit  output
> current
> and the welds along the edges of the laminations act like a  big shorted 
> turn,
> so the transformer runs hot and lossy. The transformer  pulls several
> hundred watts just idling with no load. Did I mention they run  hot and 
> lossy?
> They were built with one thing in mind - maximum  cheapness.
> 
> It is a shame because they look so tempting to use. But for  all the work
> and aggravation of trying to rebuild them, grinding off the  welds 
> across the
> laminations, knocking out the magnetic shunts, possibly  adding turns to 
> the
> primary, you might be much better off to just buy some  laminations and
> build your own transformer. Plus you will learn something by  building
> your own transformer and it is fun!
> =================================
> How about putting two transformers, with the primaries in series, and 
> the secondaries in parallel.
> Or if need more use 4, two primaries in series, then in paralleled.
> The whoole microwave is just too cheap to not use them; unless space, 
> etc is the object, not just price.  K 2 L B.
> 
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