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Sansui 500a output transformers

T

tomkzl

New Member
Hello,
i have recently bought Sansui 500A tube amplifier in non-operating condition. In process of restoration it turned out that one of output transformers (410-5247A) is burned. Was trying to find one on the net but seems like at least at the moment there are no options available.
Maybe anyone here could advice where i could find Sansui 410-5247A (or a pair of 410-5247A and 410-5247B) transformers or maybe they could be replaced by some other model transformers?
 
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What is the impedance of your transformers?

I read that the impedance of the 500A transformers is 7k.

I have a pair of 500s. They have taps for 8, 16 and 32 ohms. The winding ratios are 12, 16 and 22. You can get 4k with 4 and 8 ohm speakers.

I have plans for them in a scratch build but, might part with them if someone was trying to do a restoration on a Sansui 500.

Steve
 
Its worth looking closely at the OT to see if it repairable. It the burn mark “open” on the winding is accessible, you or someone familiar with frog’s hair wire could give it a shot.
 
Some of the auction sites in Japan have items which do not appear anywhere else, and there is an impressive amount of tube gear and parts.
 
RWood said:
Its worth looking closely at the OT to see if it repairable. It the burn mark “open” on the winding is accessible, you or someone familiar with frog’s hair wire could give it a shot.
Click to expand...
Repair guy told me that winding is burnt too much to unroll it, so he could see what is the length of wire.
 
steve... said:
What is the impedance of your transformers?

I read that the impedance of the 500A transformers is 7k.

I have a pair of 500s. They have taps for 8, 16 and 32 ohms. The winding ratios are 12, 16 and 22. You can get 4k with 4 and 8 ohm speakers.

I have plans for them in a scratch build but, might part with them if someone was trying to do a restoration on a Sansui 500.

Steve
Click to expand...
Steve, i'm not a specialist on technical issues, so the numbers dont tell me much. My main concern is not to loose a sound quality in case of using replacement transformers. I suppose you are talking about Sansui 5171 transformers?

Tomas
 
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