lot of 1 pcs.TESLA ECC88 TESTED! / 6DJ8 / 6922 / ECC88
Tubes made by TESLA military plant .
tubes tested , parameters Ua = 90V G= -1.3V
tube test: Ia1=16.25 mA S- 13.2 Ia2=15.87mA S-13.0
yellow paint marking has partially peeled off over time, but the lamp is new with excellent parameters. Steepness more than 13!