Matched Pair Japanese 6267 / EF86 Mesh Plate Vacuum Tubes Philharmonic This lot of two National

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

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

They have 280 739

round mica spacer

Matched Pair Japanese 6267 / EF86 Mesh Plate Vacuum Tubes Philharmonic This lot of two NationalThis 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