So i'm about to retube my uberschall and i've come across a Ruby Winged C and a Svetlana el34. Didn't svetlana make the original Winged C's that were branded as SED? I see SED Winged =C='s on thetubestore, but aren't those now actually Sensor Winged =C='s?
oh and why are these damn tube manufacturers so confusing
oh and why are these damn tube manufacturers so confusing