[jerryhawthorne]

Philament, don't throw out the old tubes. I can't tell you how many I have replaced that measured real low on the tube tester and the new ones didn't make any difference in performance. Dead, yes replace. I have a pair of 45s on my latest project that are in the 8 to 10 percent range on conductance and yet seem to be working well. All the other tubes are in the "replace" mode but still seem fine. We will see how things go and I get into the radio (a 111 philco).

Good luck
Jerry