4 Sylvania 6SH7 Vacuum Tubes NOS NIB Lot Of Four XXFM Loktal new in box matched pair

new in box matched pair of GE 6BL7GTA dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box US-made 6W6GT tubes tested to spec on our Paul Hart-calibrated TV7/U

MOST OF THE TUBES WE SELL ARE OVER 50 YEARS OLD

This Sylvania number 76 tube tested to spec on our Paul Hart-calibrated TV7/U

58 and 67 where minimum (65%) is 48

4 Sylvania 6SH7 Vacuum Tubes NOS NIB Lot Of Four XXFM Loktal new in box matched pairThese four new old stock, new in box Sylvania 6SH7 tubes tested to spec on our Paul Hart calibrated TV7 U. This RCA 807 output tube was tested with adapters on our Maxi Matcher 2 for shorts, gas and transconductance with 400 volts on the plates and a bias of 48 volts. There were no shorts or gas. Plate current draw was 19. 8 milliamps while transconductance measured 2440 micromhos. (New 807s typically test from the mid teens to mid 30s with