Quote:
Originally Posted by antipop
Matt has told me by PM that Manley says to use 12AX7 with the 6CA7. I don't know if it can damage anything if I use the 12AT7 that are currently installed.
I'm just a beginner with tubes so I'm learning along.
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That's odd. I've used those 6CA7's in the said Consonance amp as well as a Cary SLi-80 and never swapped out the 12AX7's when going back to EL34's. In fact, both amps used 12AX7's with KT88's as well. All that was needed was a re-bias obviously.
Both EL34 and 6CA7 are virutally identical power pentodes whereas the KT88 is a beam tetrode.
The 12AX7 is a hi Mu tube (high gain) and the 12AT7 is a lo Mu (low gain). Then of course there's the 12AU7 which is a medium Mu, or as you guessed it, (medium gain).