OT: Transformer from a microwave oven

Hi, vacuumlanders.
I posted this to the NG "sci.electronics.design" but I think this
group may well have some good ideas, so here it is....

This may seem an odd post but I'm an avid re-user and recycler of old
and/or scrapped electronic stuff (especially tube equipment), so I
hope all will be clear...

I have just picked over the carcass of a dead microwave oven (free
junk from a church sale) to get a thermal switch to repair our main
unit, but that's another story...

I pulled out all the usable bits (not many!) but also the power
transformer. It has a 1.75 x 1,25 inch core, weighs 9 1/4 lbs, and is
120 VAC to a scary 1,925 VAC (measured off load.) The core has two
magnetic shunts between the windings to give, I think, a degree of
voltage regulation (I may be able to press or knock them out, but I've
not tried yet.) The 120 volt primary resistance is about 0.3 ohm; the
2 KV secondary is 115 ohms.

Can anyone think of something useful to do with this this transformer.
All I can come up with is:

1. Use two of them back to back as a bench isolation transformer (but
watch the 2 KV floating around!)
2. Use as the OPT for a weird single-ended tube amplifier with 3.8
Kohm plate impedance (rather low) to a 15 ohm speaker (forget about 8
ohm speakers - too low; also need to isolate the secondary from the
frame (easy enough to do).)
3. Use it with a voltage doubler or tripler for an electrostatic
filter (would not fit inside most units so serious safety engineering
required.) Much too big, though.
4. Run it off a suitable battery and interrupter (NOT AC mains!) to
power an electric fence.
5. Use it as a choke in a tube power supply. I'm not sure of the
secondary winding inductance or current rating. Again, isolate the
secondary.
6. Use to replace another failed one <g> Do they ever fail?

That's it. Thanks for all ideas.
Cheers,
Roger


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Relevant Pages

  • Re: Transformer from a microwave oven
    ... The 120 volt primary resistance is about 0.3 ohm; ... Use as the OPT for a weird single-ended tube amplifier with 3.8 ... > ohm speakers - too low; also need to isolate the secondary from ... > power an electric fence. ...
    (rec.audio.tubes)
  • Transformer from a microwave oven
    ... I pulled out all the usable bits but also the power ... The 120 volt primary resistance is about 0.3 ohm; ... Use as the OPT for a weird single-ended tube amplifier with 3.8 ... also need to isolate the secondary from the ...
    (sci.electronics.design)
  • Re: OT: Transformer from a microwave oven
    ... Engineer wrote: ... The 120 volt primary resistance is about 0.3 ohm; ... Use as the OPT for a weird single-ended tube amplifier with 3.8 ... > ohm speakers - too low; also need to isolate the secondary from the ...
    (rec.audio.tubes)
  • Re: OT: Transformer from a microwave oven
    ... Engineer wrote: ... The 120 volt primary resistance is about 0.3 ohm; ... > ohm speakers - too low; also need to isolate the secondary from the ... > power an electric fence. ...
    (rec.audio.tubes)
  • Re: Transformer from a microwave oven
    ... Engineer wrote: ... This may seem an odd post but I'm an avid re-user and recycler of old and/or scrapped electronic stuff (especially tube equipment), so I hope all will be clear... ... 120 VAC to a scary 1,925 VAC The core has two magnetic shunts between the windings to give, I think, a degree of voltage regulation The 120 volt primary resistance is about 0.3 ohm; the 2 KV secondary is 115 ohms. ... Again, isolate the secondary. ...
    (sci.electronics.design)