Quote:
Originally Posted by Paul Knaack
Acorrding to Sams it says current should be about 280 ma. not to exceed 300 ma with a .47 mfd cap across meter. I'm not sure if my meter has a cap across it or how that would effect the reading. So do you think its ok were its at?
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The .47MFD should be
added across the meter leads to prevent the meter from loading the tube and giving a false reading. Any DC current meter adds some AC load to circut, and the added capacitor helps smooth it out.
Until you do this, you don't have an accurate measure of cathode current.
Usually this added load lowers the cathode current, but there are a very few exceptions.
James