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IF for some reason the jumper was removed and left off, then you will have NO hv regulation, and you may have too high HV since the idea is the shunt tube should conduct at all times (bright and dark screen). How much current it shunts depends on the HV pot setting AND the overall load on the HV system.
Last edited by DaveWM; 10-26-2012 at 08:01 AM.
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