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Thanks for the info - So does that mean you have actually heard the other
two mentioned?
"arizona cowboy" cacheoverflowATyahoo.com wrote in message
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I prefer the 6CG7/12AT7 mod by Kara Chaffee featured in one of the early
issues of Audio Xpress magazine (formerly Glass Audio)

and no new PC board required = cheap!

It sounds nicer than either of the two you mention, I feel

cowboy



wrote in message
...
Got a pair of Dyna MK III's in for repair. Customer is interested in
upgrading. I have done a little research and found an Alan Kimmel driver
board at Welborne Labs and a cascode 12AU7 & 12BH7 driver board at

Triode
Electronics. Both also have PS board upgrades. Kimmels being a mosfet

pass
regulated design, Triodes's being a simpler a cap upgrade scheme.

Any experience/opinions on sound & performance on these
or other recommendations?

Thanks & happy new Year to everyone.

TS