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the K is about +400v so if the heater drops to less than 175v he will have trouble. If
the bottom of the divider opens, the heater would go to +400v, 0 difference vs max of 225.
I guess it could go slightly positive (10-15v) with respect to the cathode ("not recommended to go positive" per data sheet) since the voltage divider begins right at the 405v supply (before the choke and vert out trans where the K voltage comes from, which puts it about 15v lower IIRC)
but anyway its something to check that has not been check yet, so fingers crossed!
Last edited by DaveWM; 01-18-2015 at 06:44 PM.
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