I tried the EH tubes, they where to bright for my taste. Right now I have Mullards Ecc83's in V1 and V2, Philips Mini Watts Ecc83's in V3 and V4 and a Mullard Ecc83 in the phase inverter. Jan Philips 7581A power tubes. This is in a Mark IIB and it really has a great clean tone, and vintage...