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 transformer rewinders 
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Joined: Wed Sep 05, 2012 10:54 am
Posts: 27
Post transformer rewinders
Hi all,
Does anyone know of a reputable transformer rewinding service?
I have a highly customized one from an amp that's needing repair.

Thanks for your help


Fri May 08, 2020 5:41 pm
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Joined: Thu Sep 24, 2009 2:14 pm
Posts: 97
Post Re: transformer rewinders
buck1107 wrote:
Hi all,
Does anyone know of a reputable transformer rewinding service?
I have a highly customized one from an amp that's needing repair.

Thanks for your help


Hey buck,
got ur mask on??
rewinding a transformer would seem to be the last resort.
Professional transformer rebuilders/rewinders are not cheap!! :shock:
Maybe u could elucidate on what the transformer is used in, maybe even link to the schematic for ur project(?) My guess is that U could probably substitue something else. Pics of the transformer would be helpfull also.
Have u done ohms tests? Voltage tests? Is xfmr shorted??? Good luck!


Sun May 10, 2020 10:59 am
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Joined: Wed Sep 05, 2012 10:54 am
Posts: 27
Post Re: transformer rewinders
Thanks for your input. Mask on (maybe to also hide my mouth when I see the price of a rewinding job?)! ;-)

This is a power transformer in an Acoustic brand guitar amp (AG-60). I was told that it had experienced a power surge and then just began humming.

It has 3 secondaries rated at:
1. 9vac,
2. 32vac (with center tap at 0vac),
3. 11vac

My ohm test showed a short between:
2 and 3

My voltage tests showed:
1. 9vac,
2. 30vac,
3. 30vac

Here is the information on the transformer itself:
HKSP-100092
070-010AG-60
HON-KWANG


I was wondering about an option in using 3 separate transformers.
Other than taking up more space within the chassis, what are other concerns for going that route?

Thanks!


Mon May 11, 2020 1:22 pm
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Joined: Wed Sep 05, 2012 10:54 am
Posts: 27
Post Re: transformer rewinders
Here's the schematic for the power board.

http://www.mediafire.com/file/iglad66sj ... d.pdf/file


Tue May 12, 2020 6:41 pm
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Joined: Thu Sep 24, 2009 2:14 pm
Posts: 97
Post Re: transformer rewinders
Don't think I can help with ur amp p/s. sure, about the multiple transformers, anything is possible given time and expense. Practical? not so much. My thought? Transformer voltages sound stable. Check all capacitors for leakage. Then replace any that are.

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Tue May 12, 2020 10:20 pm
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Joined: Wed Sep 05, 2012 10:54 am
Posts: 27
Post Re: transformer rewinders
Thanks for your input!
I just realized that I didn't include this symptom in my post:
In the rectifier circuit for the secondary that had the higher reading, there was smoke coming from one of the caps. As to what could cause that.. just a bad cap or too much voltage from the transformer?
I'm sure that if I just replace the cap and it smokes again, then I can narrow it down to the transformer, perhaps?


Fri May 15, 2020 4:09 pm
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