[R-390] Isolation Transformer

Mon, 4 Aug 2003 11:47:38 -0400

Dave -

	You can grab most any 2 large filament transformer with the appropriate
wattage ratings and put them back-to-back.  I used a pair of 56v/3A
transformers for many years set up as 115:56<--->56:115 with good success
while repairing AC/DC tube radios.  There was about a 5% voltage drop over
line voltage.

	Admittedly this may be tough if you really need a 750-1000 watt unit.

	Also check with local hospitals - most any medical device in patient
contact requires isolation.  I've pulled some very nice isolation
transformers out of discarded equipment.  The medical engineering folks are
often very helpful and might be willing to donate some discarded equipment
that you can pull them from.

	- Gary

-----Original Message-----
From: David Medley [mailto:[email protected]]
Sent: Sunday, August 03, 2003 10:17 PM
To: [email protected]
Subject: [R-390] Isolation Transformer

I am being driven crazy by the earth leakage cutout thingies or whatever
you call them. The leakage due to the line filters especially in older
radios trips them all the time.
Can anyone advise me where I can get an isolation transformer about
750-1000 watts.
Thanks
Dave

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