Sylvania 5933 807W FU7 Vacuum Tube Sylvania 5347 Transconductance measured a perfectly-balanced 2700/2700

Transconductance measured a perfectly-balanced 2700/2700 micromhos

new in box RCA 6CB6A / 6CF6 tubes tested to spec on our Paul Hart-calibrated TV7/U

This is an early-60s

pre-oil-embargo pressing and it sounds very good

a sutured top

Sylvania 5933 807W FU7 Vacuum Tube Sylvania 5347 Transconductance measured a perfectly-balanced 2700/2700This 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