Description

For sale matched pair 6J9P-E, 2 tubes with identical measured parameters and superimposed curves. Tubes are NOS/NIB, with OTK (quality control for military use), in original factory box 50 items. All tests made for tubes, quality tests (state of vacuum, filament consumption, shorts, leakage etc.) and quantity tests - values for Ip, Ig2, gm, gain (important mainly for triodes),plate resistance, in photos examples of test protocol. For each pair were compared transfer curves, see photo. Diamond matched = 2 tubes with identical curves, 0% tolerance matching. 6J9P tube is identical with E180F, 6J9P-E is a little bigger and more powerful, with rigidized structure to resist at vibration and long life. 10 perfect pairs could be selected from this batch, see full batch measured data at the end of the listing, matched pairs 33-44, 37-13, 26-2, 27-20, 9-6, 22-42, 12-19, 39-45, 1-36, 14-32, the buyer may choose pair he likes. Tested using exact datasheet setting for E180F, with German professional testing system Roetest V10, the best existing tube tester. We ship in 1-3 days, usually next day after payment, priority airmail with tracking number. Please take a look at our other listings, we are happy to combine shipping. #ID tube Ip: % Ik IP Ig2 S Ig[µA] 27 E180F 198 29.412 25.695 3.717 19.89 0.0126 5 E180F 193 28.861 25.072 3.789 21.32 0.0261 29 E180F 193 28.749 25.08 3.669 18.89 0.0129 43 E180F 190 28.196 24.652 3.544 19.91 0.0128 33 E180F 185 27.583 24.022 3.561 20.36 0.0144 44 E180F 185 27.419 24.097 3.322 20.5 0.0155 23 E180F 184 27.317 23.962 3.355 19.45 0.0171 37 E180F 184 27.433 23.962 3.471 20.9 0.0239 13 E180F 183 27.161 23.797 3.364 20.86 0.00839 26 E180F 181 27.043 23.572 3.471 21.28 0.0153 2 E180F 180 26.75 23.422 3.328 20.83 0.0216 24 E180F 176 26.17 22.875 3.295 21.56 0.0102 7 E180F 168 24.904 21.84 3.064 19.21 0.0114 20 E180F 167 24.77 21.712 3.058 18.94 0.00924 16 E180F 166 24.586 21.54 3.046 20.89 0.00957 9 E180F 165 24.508 21.442 3.066 19.33 0.0602 6 E180F 164 24.448 21.352 3.096 19.61 0.0102 25 E180F 161 23.9 20.962 2.938 19 0.00987 22 E180F 156 23.213 20.332 2.881 20.6 0.00971 42 E180F 156 23.076 20.235 2.841 19.78 0.00851 21 E180F 152 22.649 19.777 2.872 18.78 0.00866 12 E180F 151 22.463 19.642 2.821 20.88 0.00747 19 E180F 150 22.369 19.522 2.847 19.64 0.013 31 E180F 147 21.836 19.132 2.704 18.99 0.00856 15 E180F 145 21.625 18.795 2.83 17.99 0.0135 30 E180F 144 21.513 18.75 2.763 19.1 0.0062 41 E180F 142 21.152 18.487 2.665 18.74 0.0104 39 E180F 138 20.497 17.962 2.535 18.69 0.00566 45 E180F 138 20.53 17.97 2.56 18.26 0.00789 8 E180F 135 20.143 17.55 2.593 18.88 0.00795 35 E180F 131 19.676 17.092 2.584 18.49 0.00811 10 E180F 124 18.451 16.11 2.341 17.06 0.00513 11 E180F 122 18.25 15.84 2.41 16.51 0.00833 4 E180F 118 17.642 15.382 2.26 18.36 0.00576 1 E180F 117 17.509 15.27 2.239 16.75 0.00522 36 E180F 117 17.222 15.187 2.035 17.71 0.00598 40 E180F 115 17.119 14.917 2.202 17.7 0.00598 46 E180F 115 17.071 14.992 2.079 15.95 0.00355 28 E180F 114 16.984 14.88 2.104 16.61 0.00527 14 E180F 105 15.497 13.612 1.885 16.46 0.00572 32 E180F 105 15.682 13.635 2.047 17.1 0.00512 3 E180F 96 14.299 12.487 1.812 15.41 0.00406 18 E180F 93 13.869 12.12 1.749 16.51 0.00454 38 E180F 79 11.614 10.215 1.399 14.95 0.00334 17 E180F 72 10.64 9.307 1.333 14.3 0.00303