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Hello,

I have a couple UTC transformers I am trying to find out info on but
cannot find any online.

Surely someone out there has precious info on these transformers.

UTC AR-919
UTC D1212A
UTC V-4664M-12

Thank you,

Bill

[Scott Dorsey]

In article om,
wrote:
Hello,

I have a couple UTC transformers I am trying to find out info on but
cannot find any online.

Surely someone out there has precious info on these transformers.

UTC AR-919
UTC D1212A
UTC V-4664M-12

None of these even match the prefixes in the 1955 UTC catalogue I have
here, or the 1970 Allied catalouge. That is, they don't look like UTC
numbers at all.

Those may be house numbers of some sort. If so, you are going to have to
characterize them yourself. Apply 60 Hz at 1V or so to any winding at
random, then measure the AC voltage across the other windings. Now you
know the voltage ratios. Apply 1 KC square wave on one winding, then
look at another winding with a scope and add a shunt resistance to the
secondary" to make the square wave square. Now you know the impedance
of one winding. With a desk calculator you can now figure the rest.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."