Mosfets

[bulldogguitars]

I hadnt thought of unequal stages causing squealing. I definitely will keep that in consideration. Thanks for all your responses and your help. Im going to order some mosfets and get to work. I will keep you posted as to my findings. Thanks alot

[petemoore]

hadnt thought of unequal stages causing squealing.
  I think the squealing is in very high gain circuits where the input and output go through the switch, oscillating 'crosswire' feedback occurs, a fix Joe Davisson figured out is have those two signals [input and output] out of phase with one another by adding a reversing phase to the problem circuit.
 

[puretube]

i`m really glad, that the 12AX7s (tubes) have their (even numbered gainstages`) grids as far apart from each other (physically),
as possible...  

(hey: did they think about "hi-gain" [~5000] 50 years ago?   )

[caress]

With ZVEX' new Box of Rock and Seymour Duncan's new LAVA ?  Mosfets are on the rise.   

mosfets are so hot right now.

[bulldogguitars]

I agree their hot and fun