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Re: what's the application?

Hello Dave,

The driver stage is 12AT7 diff amp running at 9mA per tube / 250V plate. I am just juggling with the idea now, and although seductive in many respects i realize that at mu 65 and rp 13K it is a difficult tube to load properly.

Besides the price, what would be the disadvantages/trade-offs you see? IIRC, it is difficult to build high impedance trans with good freq response, but since there are practically no current flow maybe the use of permalloy would circonvent the problem... But at a hefty price tag for sure...

Thank you,
JD


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