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Originally Posted by Penthode
Excessive horizontal output tube current can be due to a number of things. Is the horizontal drive correct? Excessive drive will cause excessive current.
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Drive is excessive, but I can't figure out why. I can't even get the drive lines to go away with the control and the oscillator tube has incorrect grid voltage as well, not sure where to go with this.
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What are the voltages around the tube? What does the horontal linearity look like? Depending how the linearity looks, that will provide a clue(s). How about a picture of a crosshatch pattern on the screen?
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Lin is fine, nothing amiss there.
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Have you checked and substituted the H O Tube?
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2 different ones, it's not the tube.
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I am curious you say the EHT (+25,000v) is okay. How much curent is the 6BK4 shunt regulator drawing?
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Don't know, when Wayne was here we checked the HV and it was fine. If the shunt were set incorrectly, I would expect it to be much higher, or if it were redplating much lower.