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Old 11th January 2015, 07:11 AM   #1
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Default Transformer rewinding or repair needed.

Does anyone rewind power transformers or know someone who does? Any recommendation would be appreciated. I used to know someone in the 1980s but that was sooooooooooo long ago.

I have a vintage Futterman H3 in need of new iron and copper.

These transformers were too small for the job although this is the first one I've seen have problems.
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Old 11th January 2015, 04:30 PM   #2
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Try Heyboer.
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Old 11th January 2015, 05:08 PM   #3
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Thanks for the lead. Will take any others in case this doesn't work out. Have you had them build anything? This is about a 500 watt boat anchor.
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Old 11th January 2015, 08:08 PM   #4
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Any transformer builder worth his solder can rewind a laminated trafo.
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Old 12th January 2015, 03:09 AM   #5
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It's hard to find one online that doesn't specialize in anything smaller than 100 KVA units. That's why I'm asking for recos.
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Old 12th January 2015, 03:14 AM   #6
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Is tranny an accepted slang here for a xfmer or is that for another forum?
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Old 12th January 2015, 03:16 AM   #7
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Google TRS in Maine,excellent work.
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Old 12th January 2015, 06:29 AM   #8
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Most grateful for the referral. Sent an email at 1 AM.

Re: tranny - car forums.
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Old 12th January 2015, 11:04 AM   #9
rkoonce is offline rkoonce  United States
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Mercury Magnetics just rewound a Marantz 8B OPT for me. Not cheap, but a good job. Long lead time.
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Old 12th January 2015, 03:05 PM   #10
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Nothing magical about Mr. Futterman's transformers.
Suggest it would be cheaper to replace them entirely.

Exact values for the B+ are not required.
The fils of course ought to be correct.

Also, back in his day the typical house voltage was ~10vac lower than it is now,
so this means that if you run an old school transformer, the voltages - especially the filaments - are higher than spec.

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