F.S. Power transformer

There are no markings on the case, so I picked a side and gave it numbers

and letters, to I.d. things.

6 and A are the a. c. in. I had 117 volts in. Measuring 6 to B , I see 110 volts.
It looks like a tap.

C to D is 5 volts, and E to F is 818 volts, center tapped connection is on the
inside of the card board.

1 and 3 have 2.8 volts, and 2 is a center tap for that. 4 and 5 are 2.8 volts.

The case is grounded, keep that in mind for your install. I did not find any
shorts .

The bolt centers are 2 ¼ by 4 ¼ inches, the case is 3 ¾ by 4 ¼ by 5 inches,

and she weighs in at 7 ¾ pounds.

If you have a question I will try to get you an answer quick.

Asking 35.00 plus shipping,

Undoubtedly from a late 1920s or early 1930s radio, with 2.5 volt tubes. The center tapped filament winding would be for the output tube(s), with the tap used for a bias resistor.

Thanks Tim, I knew that someone would have a better idea of the what and why.