mordy
Headphoneus Supremus
- Joined
- Aug 8, 2010
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Said and done. Put in a pair of Bendix graphite plate 6080 for an hour and measured the hotspot in the tube; then the same with a pair of Sylvania 6080. Driver tubes are a pair of Japanese NEC 6SN7GTB relabled Channel Master.Let’s do a scientific test, but I need your help to set up the parameters. Burned in tubes, leave them on for one hour, playing music, no fans on, temperature measured at hottest spot in tube. OK? I can use one pair of Bendix graphite plate and a pair of Sylvania regular plates.
Played piano music; room temperature 25C.
I do want to point out that rarely do two tubes measure identical temperatures; in addition the temperature within the tube varies in different spots. The infrared thermometer has a little red dot where it hits the object and I wave it slowly back and forth for the highest reading which the thermometer locks on to.
Sylvania 6080 - the tubes are a little different but sound the same:
Bendix: 118/120C
Sylvania: 98/99C
Why they measure different when they both draw 2.5A I leave for others to figure out.