What is the difference in sound that you find with the different brand of tubes for an F-2B?  Also, anyone know what brand Alembic ships the F-2B's with?  Thanks.

Here is a link to the FAQ on tube types from Mica. If you search there have been a number of tube discussions. You also need to keep in mind that not all tube brands will fit inside the shield.  
 
Keith

I got tubes for an F-2B from Alembic yesterday.  They are Sovtek 12AX7s.
 
Bill, tgo