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I say"doob", as in short for dubious. In this video about rebuilding a Fisher 500b
I was checking out this video since i am working on one of these and was interested to see what kind of mods he was proposing. And then this came up as a "mod" at around the 13 minute mark, the poster talks about adding resistors to the cathodes in part to help avoid tube flashover. The 500b is fixed bias and the cathode is grounded. He installs 10ohm 5 watt wire wound resistors to in part help prevent power tube flashovers. At this point in the video i go WTH, a 5 watt resistor in the cathode will pose no obstacle to a tube flashover at all, besides the fact that you really would not place a 'safety' on the cathode. It seems he is confusing a cathode biased sized resistor with a voltage sensing resistor that the fixed biased tube uses.
No point in trusting anything further after that. It just shows that there are a lot of misconceptions on boobtube and you really need to do some hard research more than just checking out videos.
No point in trusting anything further after that. It just shows that there are a lot of misconceptions on boobtube and you really need to do some hard research more than just checking out videos.