"Measures" pontificates ...
>
> I disagree. Replacing tubes with no demonstrable problem is money
> in the crapper.
>
I would consider failure to hold off high voltage (regular, repeatable
"big bangs" in SSB) a demonstrable problem. Quite simply, a tube
problem is the most likely explanation in this case ... operating at
lower anode voltage reduces the problem (but does not eliminate it).
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