Matched Pair Japanese 6267 / EF86 Mesh Plate Vacuum Tubes Philharmonic They tested as follows: 56

They tested as follows: 56 and 58 where minimum (65%) is 395 and 100% is 60

This RCA Victor 5W4 tested 41/42 on our Paul Hart-calibrated TV7/U where minimum (65%) is 40/40 and 100% is 62/62

This lot of two National Union number 78 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Tube one measured 30 in its triode section where minimum (65%) is 25 and 100% is 38

Matched Pair Japanese 6267 / EF86 Mesh Plate Vacuum Tubes Philharmonic They tested as follows: 56This matched pair of Japanese mesh plate EF86 6267 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 20 for Tube One and 24 for Tube Two where minimum (65%) is 18 18. They are exactly the same on the inside. I have played them in my Musical Paradise 301 MK 3 (with adapters, not included) and they sound great! WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF