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*** I too have thought a while about exactly this... there is something that troubles me deeply though about this approach. I have a theory that too small a cap may not work out as well as one might hope. Now, shall I do a Romy and delay revealing my thoughts, lest I prejudice the outcome of this experiment?

Well, my enthusiasm on the subject is purely theoretical and is based on my wishful assumptions. I have a very firm and a very clear vision what the midrange driver should do in the end (frequency response-wise) and I am quite confident that I will be able to make my amp to have the same slope  using  an ultra small cap. The ML2 had a capacitor shunted input that I took out long time ago.  Also, at the 30pF level the positioning of the cables, layouts,  the Miller capacitances, the grid's capacitances, the many other things are mater. Therefore my estimate of 30pF is purely speculative and is based on just simple circulations. In the real would I am planning to run my 12db/octave RTA against the midrange driver and to dial-in the correct response with an air variable capacitor. After I will be done whatever will be left will be a Result. How it will sound I have no idea and it is what I’ll be very interested  to learn. Yes, Chris’, feel very free to share your thoughts and doubts on the subject and I really would like to learn what I do/think (might do) wrong.  However, be advised that it if it turn out to sound good then I will take legal actions against you. :-)

*** Actually, speaking of the ML2, am I right in thinking it uses a mosfet follower to drive the output tube?

Nope, ML2 is a 3-stages cap-coupled amp: a paralleled 12AX7 at input, a paralleled 6N6P in the middle (a Russian version of 5687) and a regulated 6C33C at the end.

The caT

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