"Phil Allison" wrote in message
...
Arfa Daily wrote:


** Out of curiosity, I stripped down the tranny from that XLS602.
Internal
shorts in large toroidals are very rare, especially with no other
fault.

The whole thing was rough as guts, with a wound core made from dozens
of
off- cuts of steel strip tacked welded together and bits of cloth tape
covering the edges. Normal toroidal cores are precison made and have
moulded plastic covers covering all sharp edges, where the primary is
wound.

That's interesting. If this turns out to be the tranny, and the owner
goes
ahead - assuming we can get one, of course - I will try to find the time
to
have a look. Over the last couple of years, I've had probably three or
four
large toroidals with shorted primaries, so maybe there's some Chinese
factory churning out cheapies like the one you saw, virtually made from
scrap ...


** The transformer maker used in the XLS series is:

" NRE Electrical Manufacturing Co Ltd ".

www.fsnre.com


( I posted the same details here on December 10,2014 )

BTW:

Is it possible the company is being run by a Mr Dai Lee ??




... Phil


Today, having pulled all of the cabling out of the way, It was possible to
see where the secondary wires spaded onto the lower PCB, and there was just
enough room between the board stack and the cabinet side to mark them, and
pull them with a pair of long-nose pliers. I then shorted the blown-out
thermistor, and hooked up the variac again. Same as before. 20 volts of
input, and the variac is grunting fit to bust, so it does look like the
transformer primary is shorted turns, as that's now the only thing
connected. So now a case of seeing if we can get the tranny and inrush
thermistor, and more to the point, at what price ...

Arfa