[AMPS]

[Hank Phillips]

In the absence of obvious failures like tubes don't glow, tubes glow too 
brightly and make loud noises, foul odors or trips breakers, what 
indications would lead you to retube a 3-500Z amplifier?

In my case, it is an 18-year old Henry 3K-A with the original finals.

tnx es 73,

Hank
AA4HP


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