Thread: gassy 21fbp22 ?
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Old 05-19-2014, 05:40 PM
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Username1 Username1 is offline
Not sure how I got here.
 
Join Date: Dec 2009
Location: Orange County NY
Posts: 3,649
Unless you can get others to agree, I think it's unlikely any arcing made the glass blue.
Unless it's some contamination. Does it scrape off....? If it's "in" the glass, then it was
there from day 1, I can't see arcing doing anything to glass....

You should be able to measure cathode current on the tube, it's the low voltage end of
the tube, and you should be able to measure each gun, I think current is listed on
the schematics.....? If there is HV issues, just turn the brightness up and down, and
check the HV, does it fluctuate more than 3-5KV ?? Is it near where it should be 20KV ?
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Last edited by Username1; 05-19-2014 at 05:45 PM.
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