This is a long shot, but I'm trying to find out the make and model of a transformer I worked with briefly about 3 years ago, and can no longer find in my lab. I wrote down all the markings I could see on the package:

Part number? "MGO - W26350" or "MCO - W26350"

Only other markings were for the primary and secondary:

"1-2-3 3k CT PAT"
"4-5-6-7 3k SPLIT"

It was a small PCB-mount transformer used for isolation of 0 - 5V AC signals.

Like I said, it's a long shot for anyone to simply recognize that part number, but I'm hoping. Apparently Google hasn't heard of it either.

 

What frequency?

How about a mains transformer with a twin 0-6V primary?

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Can't really talk about the frequencies. I've found another transformer that works okay for the application but an older more "original" design used this unknown transformer that I can't find anymore. Was just hoping that someone recognized the part number, but it's a long shot at best.

 

Just out of curiosity what type of transformer did you use in the end?

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Tamura TTC-203SL:

http://www.tamuracorp.com/clientuplo.../TTC-203SL.pdf

The datasheet says it's freq. response is only up to 3.5kHz. I'm pretty sure the older unknown transformer had a wider range, so I'm looking into other replacements.

Actually, I have a question. If you can see the datasheet I linked, what exactly does the spec mean for frequency response? "0.15, -0.35dB 300Hz to 3.5kHz"? Does this mean response has only dropped by 0.35dB @ 3.5kHz?

 

if you cant't talk , at least you can say the sorroudigs where it it is used and for what purpose? whether the primary is connected or expected to be connected to public mains as input / or/

is it connected to telecom or modem -- /or/

is it an smps power supply transformer--

if you can't speak for your requirements -- how can these doctors treat your case dear

Sarma

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Sarma.

 

I was just hoping that someone recognized the part number in my first post. I have chosen a replacement part that seems to work well.

But here are some more details about the application:

This transformer is being used to isolate incoming -2.5V to +2.5V sinusoidal signals from another system. There is basically a pre-amplifier that must be isolated from a signal processing circuit. If the output of the pre-amp is not transformer isolated from the input of the processing circuit, it doesn't work (signal processor doesn't read correct frequencies/levels, etc.). It is a little like AC coupling an input to throw away DC levels.

No connection to public mains or anything... primary is just passing sine waves to the secondary for isolation purposes.