Unknown Transformer

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infomet
Member
1151
Mar Sat 08, 2008 2:21 am
Hillsborough, NC 27278

Unknown Transformer

Post by infomet »

HEAVY, drop through mounting.
The only marking is

B-1650-13
773392

It's a ten pounder and I'll be making measurements.
Big one, like a big TV set or giant Philco.
Hoping someone will recognize the numbers/layout.

Wilson
JGTubeamps
Member
530
Mar Thu 21, 2019 2:53 pm
Nicosia / Cyprus

Re: Unknown Transformer

Post by JGTubeamps »

Hi Wilson,
Today I found in my schematics the test results of 5 unknown transformers with a number similar to your 773392. The numbers printed on my transformers are: 770865, 771422, 770890, 771887, 771265. All the aforementioned transformers have 240V primary windings with multiple taps for other voltages operation and low voltage secondary windings such as 6.3 , 8 and 8.5V.
infomet
Member
1151
Mar Sat 08, 2008 2:21 am
Hillsborough, NC 27278

Re: Unknown Transformer

Post by infomet »

Thanks!
WL
dougmc
Member
760
May Wed 11, 2016 1:18 am
springvalley ohio

Re: Unknown Transformer

Post by dougmc »

my under standing the 773392 is the eia code and date code.
https://www.ecianow.org/assets/docs/EIA ... 0Codes.pdf" -="window.open(this.href);return false;
if so 773 is
American Precision Industries Inc.
270 Quaker Rd
East Aurora, NY 14052
which is now
https://www.buzzfile.com/business/API-D ... 6-652-3600" -="window.open(this.href);return false;
https://www.delevan.com/en/products" -="window.open(this.href);return false;
slight chance the may have data on that old transformer but try.
Doug
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