Bottlehead Forum

RE: Paramour 6.3v filament supply not center-tapped?

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In Reply to: RE: Paramour 6.3v filament supply not center-tapped? posted by Caucasian Blackplate on March 24, 2008 at 12:07:58

I tried that and it did drop the noise noticably. I still don't own a 'scope, so all comparisons are done by ear, unfortunately.

What I'm refering to is a tidbit that I originally gleaned from Morgan Jones in his book, "Building Valve Amplifiers." I refer to page 122: "AC heater wiring should be connected to the transformer in a balanced fashion. Unfortunately, heater wiring MUST have a DC path to 0V in order to define the heater to cathode voltage..." He then shows three ways to achieve this: using a center-tapped filament supply, a pot or a pair of matched resistors to chassis ground.

I was under the impression that this was standard practice and was wondering why it hadn't beed done in the Paramour? Am I missing something or has my conformist mind simply been blown by the evil geniuses at Bottlehead?

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RE: Paramour 6.3v filament supply not center-tapped? - Caucasian Blackplate 12:50:28 03/25/08 (0)

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