Power section is 2 el34's, OR 2 KT66's.  and the preamp uses 3 12ax7/ecc83's.  Solid state rectification keeps this amp tight, even when wound up.  I am constantly testing preamp tubes for the best possible combination.  I have also been testing the use of KT66's in this amp, and its amazing.  All amps are now set up with the ability to adjust for KT66's, to give you that early Page,Clapton, etc type tone.
Built with the same attention to detail, and high quality as all our amps. Custom wound Heyboer transformers recreated from a teardown of the Drake 784-139 OT, hand assembled and hand wired, with no compromises.  Chassis are welded for extra support and durability, and switches are all heavy duty units for long trouble free service.
The V50 comes standard with:
Winged C EL34 power tubes and a mix of Mullard, JJ, EI, or Tungsol preamp tubes.
Custom wound Heyboer output tranformer, power transformer, and choke.
ARS and Sprague high quality filter caps.  Handwired with silver core teflon jacketed wire.
External bias jacks, with top mounted 10 turn bias pot for easy, precise biasing.