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I think these came out of Polk PSW-200 subwoofer plate amps that used a pair of the TDA7294's. They are 28-0-28 AC volts unloaded, so they are probably rated at 25-0-25, probably 120VA. Not huge, but good enough for making an honest 100W amp. The voltage is a bit too high for LM3886 amps, but they are fine for the TDA7294/TDA7293.
I had 8 of them but tried unwinding one to see if it was fairly easy to repurpose the copper wire, which is about 18Ga. Because of the way it is wound, it's not easy to remove the wire--it took way too much time, and I don't see an easy way to do it. I assumed there would be a ferrite core that would break with a few hammer blows, but it's not ferrite--the core is a continuous loop of flat steel ribbon, wound into a donut shape. So I'm giving up on them. If no one wants them, they are going to the scrap yard to get money for the copper.
You can have them for the cost of shipping plus a small amount for handling (like $5 ea, or $20 for the lot).
I had 8 of them but tried unwinding one to see if it was fairly easy to repurpose the copper wire, which is about 18Ga. Because of the way it is wound, it's not easy to remove the wire--it took way too much time, and I don't see an easy way to do it. I assumed there would be a ferrite core that would break with a few hammer blows, but it's not ferrite--the core is a continuous loop of flat steel ribbon, wound into a donut shape. So I'm giving up on them. If no one wants them, they are going to the scrap yard to get money for the copper.
You can have them for the cost of shipping plus a small amount for handling (like $5 ea, or $20 for the lot).
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