Mystery ransformer ID

[Axtman]

Does anyone know anything about this transformer and possibly have a schematic for it?

For some reason the image will not upload so I will give you the numbers.

300217-1
1052 6630

[Axtman]

Here is the picture.

[glebert]

1052 is the EIA code for Transformer Manufacturer, Co., Norridge, IL. I think it is pretty common to have the date code follow that so I would assume this was made in 1966, week 30.

[nosaj]

once you can identify the primaries it'll be easy to figure out what the secondaries would be voltage wise.
nosaj

[g1]

once you can identify the primaries it'll be easy to figure out what the secondaries would be voltage wise.
nosaj

Not sure I would agree with the example numbers given in that link.

[J M Fahey]

300 to 700 ohm primary might apply to 20V pinky nail sized transformers.

In sizes as shown by OP which is a large one, IŽd expect , say 5 ohm class values; for Tube amps HV secondaries , say 50 to 100 ohm and filaments less than 1 ohm; for transistor amp supplies, secondaries: in the 2 ohm class or lower.

Old service schematics used to include transformer expected DCR, an excellent idea which was sadly dropped later

HereŽs a Silvertone.
http://www.prowessamplifiers.com/sch...ertone1472.pdf

Notice it states:

* PT - 117V Primary: 10 ohm
HV secondaries: 125 ohm each

* OT (6V6) primaries: 175 ohm each.

[Helmholtz]

We don't even know if it's a PT or an OT.
If it's a PT for a tube amp it might be for a small, maybe 20W amp.
If it's an OT it could be for a 40W to 50W amp.

As JMF said, the DCR of a HV secondary is always larger than the primary DCR.
I just measured a PT for a JTM45, primary DCR is 10R@230V taps (would be about 2.5R when wired for 120V), full HV secondary (2x325V) measures 134R. But that's a much larger transformer, so its DCRs will be lower.

How many windings does it have? Any CTs?

[The Dude]

^^^^ Yes, that. It might help to upload a picture that includes/shows the wires exiting the transformer.

[glebert]

This may be the same company that made it, you could contact them and ask. https://tmitransformers.com/