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In Reply to: RE: Sonically, its called the " choir effect ". posted by kyle on December 09, 2016 at 08:28:08
as it is clearly a listenable affect. ( turn yer sarcasm meters off before reading this ). Perhaps *SOMETHING* is going on that is attributed to putting the two sections in ||...IDK, have seen no measurements ever.
What we have are 'opinions' based on no measureable proof. Then added on to this are aspersions cast on 'Engineers'...and often in the same post an EE PhD is then quoted...or at least his POV highly spoken of.
*LOVE* the Irony indeed.
On the 6SU7, this one is effectively a matched section-section 6SL7, IOW a very fine candidate for paralleling the two.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
Follow Ups:
They did not find the effect. I think that they were using output tubes. Lynn Olson was an author if I remember correctly.
I don't think it is a listenable effect. The paralleled sections act in unison in practice. The electrons don't know anything and the physical separation between the two devices is negligible as far as they're concerned.
I guess who would even bother to attempt to measure a potential effect? The time based delay wouldn't even be measurable on their equipment. If there is some kind of femtosecond delay or interaction is that even something to be concerned with for audio signals?
I'd love to see some measurements on a paralleled 6SU7 vs a mismatched paralleled 6SL7 and see if there is anything that shows an unexpected result. I'd imagine the linearity would be affected by one section running at a significantly lower current than the other, but any temporal effects should be insignificant.
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