"Patrick Turner" wrote in message
...
[...]
The answer to such uneven
matching amoung a given batch of supposedly NOS Red Lion KT88 is to
have some additional bias balancing adjust method as seen in another
pair of Quad-II I rewired where I used EHKT90 instead of KT66, see
http://www.turneraudio.com.au/quad2powerampmods.htm and proceed to
about 1/2 way down the page to the 2005 schematic.
What's the reason you chose 560K for R11 while R10= 470K?
Rgds,
Gio
Patrick Turner.