Standard Tested: Tested for all faults and crackles etc but balanced triodes are not guranteed
Premium Tested: As above but specially selected for V1 or Phase Splitter positions. These have balanced Triodes and low in noise.
Factory Tested: Sold as received direct from Sovtek factory - No testing at Hot Rox
Size is an issue Review by ivan
The valve works great, with the only problem being the glass envelope - it's too wide. It doesn't fit any of the sockets with metal cans, so it is only useful if the gap where the valve will sit is wide enough. (Posted on 29/05/2012)