The original output tubes used were the Yugoslav Ei 6BQ5. Those have been out of production and unavailable since, when? The 1990's? The Russian NOS 6Pi14Pi EL84Ms are fantastic output tubes. They are rugged and last forever. Of course to some folks, unobtainable tubes always sound better...
B+ was lowered slightly and DC heaters were added to original Stingrays a very long time ago to be kinder to all EL84's and to allow for non-spiral-wound input tube heaters for quieter operation.
An important addition to the Stingray II and iTube models is the increased B+ capacity over the old models. You can really hear the deeper and tighter LF slam with those 8 x 1200uF caps in the HV rails.
The newest Stingray II and Stingray iTube models include all switching and I/O options everyone always wanted and more. Tetrode/Triode switching as standard, and of course RF remote control. There is even a sleep timer. I am totally guilty of feature creep, and I put all those features on there because I could. That's why.
B+ was lowered slightly and DC heaters were added to original Stingrays a very long time ago to be kinder to all EL84's and to allow for non-spiral-wound input tube heaters for quieter operation.
An important addition to the Stingray II and iTube models is the increased B+ capacity over the old models. You can really hear the deeper and tighter LF slam with those 8 x 1200uF caps in the HV rails.
The newest Stingray II and Stingray iTube models include all switching and I/O options everyone always wanted and more. Tetrode/Triode switching as standard, and of course RF remote control. There is even a sleep timer. I am totally guilty of feature creep, and I put all those features on there because I could. That's why.