david knepper wrote:
If you have one tube like aan 833A running slightly cherry and the other is not showing any color, then, the latter is a weak tube. The former has low emission, in other words.


Not all 833's are created equal.
Your statement is not necessarily true.

Depends on the plate current. It should be close to the same for each tube, with identical grid bias and/or grid drive conditions. If the tubes are way off balance, chances are the low-reading tube is weak, or the high-reading tube is gassy.

It's best to have a separate plate meter for each tube, so you can always be aware of tube balance.

Don k4kyv
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