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In Reply to: RE: Most likely, it is perfectly OK. posted by Mendel on July 14, 2014 at 13:32:44
Mv 50 allows to bias individually ,so i know i can't harm anything.
It was orignally voiced with Sylvania /Philips Ecg 6ca7 ,a beatiful
and rugged american tube .
I' m curios about every 6ca7 ,being beam terode ,vs pure el34
,penthode.
The treasure 6ca7-z go for 596 eu for a matched quad (a lot of
money9.
My point was :is it possible for you to reach the top of satisfaction
with cheap russian tubes like eh and tung-sol for examples ,mixed
together .
My Mullard xf2 quartet,for example, doesn't sound so lively as the
mixed el 34 eh-tung-sol quad ,wel matched and individually biased.
If anyone has an el 34 based amp and two spare quartet of eh and t-s,
have ever tried this mix?
I think could surprise ....
That's what i found coming from a perfectly matched Winged c el34 and
rft quartet ,in my amp in my rig ( but i know the amp like my wife ...
no i know my amp better ...especially in August :-)
Follow Ups:
I have been very impressed with the Electro Harmonix Big Bottle 6CA7. The seem to do magic with my amps (Consonance Cyber 800 Monoblocks). I don't usually care for the Russian output tubes. These just rock the house in my amps full and big sounding to match their girth. I don't think they come close to the cost that the other OP tubes mentioned do.
Steve
You might also try some of the re-issue KT77 tubes, which are not too expensive.
Thank you guys
Eh 6ca7 fat bottle has been my reference tube in mv 50 for years :
it was the safe path!
I have the original genelex kt 77 .a perfect matched quartet:i've
never tried them ;there will be the right time .
Listening from baroque to techno ,i wait a long time before
judging a tube ,or a certain mix of tubes;i try to be the more
scientific that i can ;i measure tubes of the same batch
and then listen tryin to exrapolate a paradigm.
My experiments may last months on the very same tube.
I found that often ther's no reason to prefer nos on new tubes or
vic eversa :a good tube is a good tube ,first because it's in his
specs,second (but very first)because do the trick ...the magic.
I often can't tell if two tubes having same specs ,sound the same :
maybe one is magic ,the other only good .
For sure G.e,telefunken ,tungsram,old tesla etcetera produced great
tubes ;but the magic tube hide itself sometimes beyond a dark getter
or a common 6h23ev.
Turning back on thread :now i'm focused on common russian el34 :
i've always thouht that eh el 34 was only an honest tubes ,but i
found that it was magic mixin it with Tung-sol el34 -b.
So assuming that a push -pull can work correctly only with
a balanced series of electrical parameters (transconductance,
gain,etc.),that it's what i wanted to point it out .
I wanted to share this experience with this particular amp ,and curious
to know if anybody had similar experience ;just to learn more ,
and not for saying the tube A is better than tube B.
Thank you for your kind attention.
Marko
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