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 Post subject: Re: Cheap Audio Transformers
PostPosted: Apr Wed 07, 2021 4:40 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 4957
Location: Texas
For my 6BM8 single ended amp, I tested 70 volt transformers using Bob Weaver's suggestion of a constant current supply. I tested the Radio Shack 32-1031, the Bogen T-725, the Hammond 125E and the Altec Lansing 15716, which I employed in the amp. Here are the saturation measurements along with frequency response. The frequency responses differ by the feedback resistor used.


Attachments:
saturation.jpg
saturation.jpg [ 104.99 KiB | Viewed 497 times ]
Altec6BM8 CKT216 ohm FB.jpg
Altec6BM8 CKT216 ohm FB.jpg [ 123.97 KiB | Viewed 497 times ]
Altec6BM8 CKT216 ohm FB-LOW END.jpg
Altec6BM8 CKT216 ohm FB-LOW END.jpg [ 105.43 KiB | Viewed 497 times ]
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