4 RCA 6BG6 6BG6G Vacuum Tubes Shoulder ST-Shape Triple 3 Mica Lot Of Four 6EH5 Septal T13 I just cleaned this two

I just cleaned this two (of three) record LP set on my VPI 16

dimple sheet getter

Tube One measured 64 while Tube Two measured 68 where minimum (65%) is 46

Two have MISSING CENTERING PINS

4 RCA 6BG6 6BG6G Vacuum Tubes Shoulder ST-Shape Triple 3 Mica Lot Of Four 6EH5 Septal T13 I just cleaned this twoThis lot of four RCA triple mica 6BG6G output tubes was tested on our Maxi Matcher with 400 volts on the plates and a bias of 48 volts for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 2020 micromhos for Tube One and 1630 for Tube Two. Tubes Three and Four measured 2260 and 2380, respectively. Plate current draw was 15. 6, 17. 3, 19. 4 and 27. 7 milliamps, respectively. (New 6BG6s typically test with plate