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Re: Is replacing the 6SN7 worth it?

IMHO, in top to bottom order of sonic improvement V1, V2, V4, V3. I have M-60MkII.2 so I think the 5th tube is a refinement of the CCS? V4 is the driver in mine, V3 the CCS, V1 input, V2 cascode. I changed all of mine until I was I happy. Came with two RCA RB 5692 in V1 and V2 and sovtek all else. Ended up with KenRad black glass VT-231 as V1, 50's Raytheon brown base WGT as V2, anything will work fine as CCS as long as plates match well(EH) and TungSol tall GTB as driver.


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