On 9/27/2019 5:21 PM, Fred Smith wrote:

On 2019-09-27, Bo-Lennart wrote:
Hi all out there.
I found a transformer in my basement. I don't know if its a audio-output transformer or just a power transformer.
On top it's stamped "GALVIN MANUFACTURING CORPORATION",
and a model #: "25B31296-E" and a serial# ( ???? ) "138226"
At bottom there is 8 solder lugs, stamped: "1 to 8".
And at one side is 8 screw connector, labeled as "3A 12 11 2B 2A 10 1A 9".

To me it looks more like a tube output transformator, more than a power transformer.
It seems to be from the 1940 or somewhere around there.

Anyone know what it is, and have some kind of "schematic" of the transformer.

Many thanks in advance

Bo-Lennart Karlsson
Falun, SWEDEN

Audio output transformers generally don't interleave the "E" and
"I" laminations, and may have an obvious bit of waxy paper between
the block of E and I laminations. Power transformers almost
invariably do interleave the laminations (I've never seen one that
didn't).


Well Fred, if you are correct in your assertions, you will be Fred, if
Phil gives us his wisdom and it doesn't agree, we will find your aliases.
Mikek