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RE: 12AX7 tubes in Eico ST40 amplifier

Posted by akolegov (A) on July 7, 2014 at 03:46:07

In Reply to: RE: 12AX7 tubes in Eico ST40 amplifier posted by Eli Duttman on July 6, 2014 at 20:30:49:

Thank you.

Indeed, the seller completely reworked the phono stage (I quote him below):

"Installed a new additional filament transformer and associated circuit to allow the upgraded phono section tubes to be heated with filtered DC rather then AC which doomed the original phono section to hum."

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