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In Reply to: RE: Mc60s New Chassis and all film cap supply posted by sony6060 on December 17, 2014 at 12:23:12
Oh there is no comparison..The mc60s even running EL34s which runs them a bit cold unless you change a bias resistor has more character and more detail and more depth than the 8B does..I have a pair of nines that I left original and they were given to me by an old audio mentor that bought them new in 1963 but they never impressed me..I've owned them since 1992 and I just left them alone because there isn't much room but I will recap them..
This is the way you do vintage gear as I did the Mc60s because this way I can put it back to factory stock without damage.
"
Follow Ups:
Hi Mike,
Interesting! The circuitry is very complex. It also could be the unique bifilar output transformers. What is your opinion on why it sounds better than the Marantz?
Da
I remember Bruce Rozenblit writing in one of his tube audio design books that the MC-60 design "humbles the best of us." Cathode windings that apply degenerative feedback, plates coupled to the opposite tube's screen grid, bootstrapping in the driver circuit, and a bunch of things I'm probably not remembering. It was all seriously cool for 1955... and for today.
WW
"A man need merely light the filaments of his receiving set and the world's greatest artists will perform for him." Alfred N. Goldsmith, RCA, 1922
It seems that I would have to really know my engineering to see all that is going on with that amp. It's time to keep studying!
Dave
Favorite tubes in the MC60?
I like the 6550 TungSol black plates and the EI KT90s and the Genelex KT88s. All three of those tubes do very well in these amps.
"
Did you audition the new GL KT-88 in the amplifiers?
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