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Old 6th May 2013, 09:33 PM   #21
4est is offline 4est  United States
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Join Date: Sep 2009
Location: Grand Rapids, Mi
Thank you Mars2! I am about to try my BII with UTC HA 100x @1:10. I am hoping that I have enough gain, but am thinking I may not with the 1ohm resistors I am going to try. Some sort of balanced (or SE I suppose) 12ax7 tube circuit is first choice.

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Originally Posted by mars2 View Post
@4est:
I mean in general using a low resistor (not low Z transformer) as I/V directly at the output of the chip, followed by a min. 10x step-up transformer (f.ex. a MC-transformer).
The following tube stage should then be a high-gm/transconductance one (5842, D3a, 6E5P etc.).
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