Mordy, what about using two 1/2 6SN7's so many variants out there.
Or even two 6SJ7's strapped in triode mode?
I have used both the 6CG7 and 6FQ7 in the same circuit and never had any problems.
I never tried them in my LD.
Edited by rosgr63 - 2/9/14 at 2:15am