invitro-FETs

[The Dark force of dance]

Y-ellow Y'all.
        I'm wondering if anyone could give me a clue as to how to work out
the bias arrangements for some Glow-FETs. In particular 12AX7s and 12AU7s. I
want to bias them up to about 200 volts to overcome the clouding problem but
I'm not sure how to calculate the bias resistors. Actually, I have no clue
at all to be exact. Whilst I like John Simonton's idea of using a starved
tube scheme, I want a crystal clear sound rather than a distorted one. I
just want those little non-linearities that valves bring to the table.

I would assume that the bias for a 12AX7 would be identical to that for a
12AU7. Whilst I'm not really up on invitro technology, I'm led to believe
that the AU7 is just a lower noise, lower gain version of the AX7. So it
will be those little suckers of which I'll more than likely be using.

Out of interest, I'll be attempting to bias them up with a U-Beaute DC-DC
converter. Low current but a hell of a lot of voltage. And in a real small
space.

Any help would be greatly appreciated.

Thanks In advance.

be absolutely ICebox.
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