Chris- You may have missed my response to one of your comments on
RAT. Anyway, here it is again-

-----------------------------------------------------------------------------------

And would allow a higher plate voltage for any particular screen
voltage, and an opportunity to regulate the screen voltage.

And, a better amp; yeah, you betcha.

I did exactly that in an amp published in AudioXpress magazine
August 2004.
Using a PP pair of 6LU8's with 400v plate & 320v screen it manages
37 watts
at clipping. The total cost is about 200.00 USD.

More recently an experimental amp of this kind managed a DF of 5
with no
loop NFB at all. The circuit is a winner for a number of reasons.

John Stewart

------------------------------------------------

Interested?

On Mon, 18 Apr 2005 23:13:03 -0400, John Stewart
wrote:

Chris- You may have missed my response to one of your comments on
RAT. Anyway, here it is again-

More recently an experimental amp of this kind managed a DF of 5
with no
loop NFB at all. The circuit is a winner for a number of reasons.

I'm ashamed to say that I'm several years behind on the New
Hampshire magazine family. Various friends and acquaintances
publish articles, so I have no excuse.

Yours, without loop feedback, sounds especially worth researching,
Thanks,

Chris Hornbeck
6x9=42 April 29

in article , John Stewart at
wrote on 4/18/05 11:13 PM:

Chris- You may have missed my response to one of your comments on
RAT. Anyway, here it is again-

------------------------------------------------------------------------------
-----

And would allow a higher plate voltage for any particular screen
voltage, and an opportunity to regulate the screen voltage.

And, a better amp; yeah, you betcha.

I did exactly that in an amp published in AudioXpress magazine
August 2004.
Using a PP pair of 6LU8's with 400v plate & 320v screen it manages
37 watts
at clipping. The total cost is about 200.00 USD.

More recently an experimental amp of this kind managed a DF of 5
with no
loop NFB at all. The circuit is a winner for a number of reasons.

John Stewart

------------------------------------------------

Interested?



Dag! I went through my stack of AudioXpress and wouldn't you know, I can't
put my hands on that issue.

I would be interested in more info. A while back I looked at the 6LU8 as an
overlooked output tube (with driver, no less!)

TIA,
Jon