Sylvania 5933 807W FU7 Vacuum Tube 13GB5 Plate Cap gray plates and bottom

gray plates and bottom

On the Maxi-Matcher

new in box RCA Black Plate 6BK7B tube tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 33GY7A tubes tested to spec on our Paul Hart-calibrated TV7/U

53/52 and 54/54 where minimum (65%) is 40/40

Sylvania 5933 807W FU7 Vacuum Tube 13GB5 Plate Cap gray plates and bottomThis Sylvania 5933 807W FU7 output tube was tested 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 17. 2 milliamps while transconductance measured 2050 micromhos. (New 5933s typically test from the mid teens to mid 30s with transconductance from 2200 micromhos). I am playing it now in my Musical Paradise 301 MK 3 (with an adapter, not