Power transformer identification needed
- Thread starter MickeySmile
- Start date
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I think what you're seeing is what there is. It's a Navy transformer, but it could be anything--a power tranny, a line-matching tranny, a filament tranny--anything. My guess is power tranny with filament supplies. You could measure the taps for continuity. 1 & 2 might be the primaries, then three high-resistance taps for the HV supply, a center-tapped 6.3 volt supply and a 5 volts supply for the rectifier. But that's a mere guess. I'd hesitate to even apply any voltage to it to test it. If it's a low-current, very high-voltage output it could be very dangerous to test. That's unlikely given the lack of ceramic insulator posts, but I'd still be wary.
Its a physically odd configuration. I'm betting it mounted in the corner of the chassis underneath just based on the bottom flange and the side bracket up by the terminals.
Beyond the odd mounting though its probably fairly standard stuff. Agree about ohm checking things to figure out what goes where, make an educated guess bout what the primary is, and feed it 12 volts to see what it does. If you get the primary right, everything should come out about 10% of what it would do on mains input
of course thats just taking a guess that its meant for 120v power feeds. being military it may be designed for something else entirely.
Beyond the odd mounting though its probably fairly standard stuff. Agree about ohm checking things to figure out what goes where, make an educated guess bout what the primary is, and feed it 12 volts to see what it does. If you get the primary right, everything should come out about 10% of what it would do on mains input
of course thats just taking a guess that its meant for 120v power feeds. being military it may be designed for something else entirely.
JohnT123
Super Member
I'm thinking multiple input and output taps. What would they use on a ship? I suspect line voltages could be very different in the way industrial electricity sometimes uses multi phase AC like 208 volts. As the others have said, connect the probe to one lug and then ring it out to see what is interconnected.
MickeySmile
Well-Known Member
Thank you all for suggestion as discussion so far!
Winding ratio determines voltage, winding resistance and core size determine the current rating. Measure resistance between all combinations of terminals; post it if you're not sure (numbering typically starts with the primary). But in the end, you'll need to apply some voltage and measure the other windings.
Scuzzer
Fixed Bias
https://www.angelfire.com/electronic/funwithtubes/Transformer_Lead_Colors.HTML
Transformer identification. Don’t know if that guy is still alive but someone needs to mirror his site because it’s an engineers viewpoint on tube amps.
Transformer identification. Don’t know if that guy is still alive but someone needs to mirror his site because it’s an engineers viewpoint on tube amps.
MickeySmile
Well-Known Member
Thank you! I will read and test those transformers this week end.
