Donnie

:Hi
:
: Regardless of what a tester shows don't throw away 01A's or other very old tubes. Some can have emission brought back and even duds have value.
:
: Norm
:
::Thomas,
::Thanks for your remarks. Not all engineers use the same tactics or approach to a repair, but if the outcome is the same, that's what matters. Six to one, half dozen to the other as they say. I choose to trust my tester, it has never failed me in 20 years of service. If you want to plug every tube of a certain type into the socket of a radio to find the one that works well enough, that is your choice. I trust that when I plug a tube into a socket, it will operate to anyones satisfaction. This approach has always worked well for me, and the way I prefer to do it.
::
::Donnie
::
::
:::And yes, I know that your tester is not an emission tester. Regardless of how infinite your bias selection is, your tester probably does not have the capability to run a tube under all current load conditions. Your tester is probably usually right, but I discourage using it as the last word.
:::
:::Thomas