Quote:
Originally Posted by peverett
Another tube to replace(if the set has one-not a solid state rectifier) is the high voltage rectifier tube. These cannot be tested well on a tube tester, checking by substitution is much more accurate.
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This is very true!

And also applies to output tubes--sweep or audio, and also many other applications. I use a rather elaborate tube checker here if the mood strikes me. This condition has happened very seldom to me over the past 30 years or so... I have a beauty of a transcon tester, and use it in special circumstances, but not to qualify a tube in typical receiver applications, no.