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In Reply to: RE: Listening Impressions: PP Series- vs. Parallel-Feed posted by nullspace on October 24, 2009 at 12:36:57
Today I had some time, so I hooked up one channel in parafeed, no parafeed DC-blocking caps, and lifted the center-tap of the output transformer. I understand that's not ideal and that there would be some unbalanced DC on the transformer, but it shouldn't be much. The EH 2A3s I bought are new and ostensibly 'matched', so I think it shouldn't be more than a couple of mA.In a word, wow. Really, really nice. Top to bottom, an improvement over the channel with DC-blocking caps and the center-tap grounded. Definitely this is an improvement worthy of making the investment for the plate chokes.
I'm going to hook both channels up in 'normal' parafeed for now, just for caution's sake I suppose, but over the next couple of weeks I'll be heading down one of the differential paths outlined below in the previous thread. I'll post updates.
Regards,
John
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