Matched octet of E34L = 8 tubes selected with very close measured parameters, 1% tolerance selection, all 8 tubes 116-117% plate current as seen in pics.
New tubes, never inserted in a socket except tests we made on Roetest.
Made by JJ Electronic, Slovakia, Tesla factory successor, E34L is a factory selection of powerful EL34, over 100% plate current is named E34L, under 100% named EL34.
Tested using Roetest V10, the best existing professional tube tester
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