[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Isolation transformer - MOT?

Original poster: "Dale Nassar by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dnassar-at-i-55-dot-com>

You will find that MOT's run HOT even under no load!!  I guess they just 
weren't designed for cts. use.  A powerful cooling fan helps a LOT.

I am not suggesting this, since I haven't tried it, but instead of the 
--almost impossible-- task of replacing a secondary with a primary (it's 
tough enough just to cut and drill out the secondary), why not use the pair 
of transformers with the sec. of transformer 1 connected to the sec. of 
transformer 2.  This will give an isolation (double) with 120VAC in and 
120VAC out.

BTW, I have for many years had my oscilloscope connected to the line 
through two back-to-back radio shack transformers (25.2 VAC I think) since 
I like to scope a lot of line connected devices and direct wave forms.
--dale nassar

At 09:38 AM 5/25/02 -0600, you wrote:
>Original poster: "Matthew Smith by way of Terry Fritz 
><twftesla-at-qwest-dot-net>" <matt-at-kbc-dot-net.au>
>Hi All
>The joys of living in a small country town!  Only two shops sell
>microwave ovens and only one does their own repairs.  The result is a
>stream of similar ovens (Panasonic) with *identical* transformers, caps,
>diodes, etc.  (Collect enough and you can make a working one.)
>Not the real reason for my post though...
>If I have two identical transformers, what is the feasability of
>removing the secondary from one and replacing with the primary from the
>other?  Would this give me a decent 1kVA isolation transformer?
>I rather like the idea of running my bench supply through one with a
>heck of a lot of filtering - stop SSTC signals showing up where they're
>not wanted.
>Matthew Smith           |   _     ASCII Ribbon Campaign
>IT Consultant           |  ( )  - No HTML/RTF in e-mail
>Kadina, South Australia |   X   - No Microsoft docs in e-mail
>http://www.kbc-dot-net.au   |  / \  - No vCards
>Geek Group G-2 #1220