you see, this is why I advised you to get a REAL tube tester, rather than
that little toy tester you are using.
if the tube is boxed, and the flashing is 100%, seller reputable, then it is
likely the tester that is your problem
about 99% likely
99% of NOS tubes I buy on ebay are truly NOS!
get a real tube tester, and get it calibrated
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cheers!
cowboy
"Ozzy 2005" wrote in message
...
Just got a 5814 / 12AU7 in and tested it on my tube tester according to
the setup instructions on the tube list that comes with the tester.
Sencore Mighty Mite II, TC 114. Of course the tube was sold as NOS,
however, an odd thing happened when I tested it. Both sides fail.
There are no shorts or leakage and my tester was calibrated, albeit a year
ago, and tests all my other tubes, 12AX7, 12AT7, EL34, EL84, 6L6GC fine
and has properly indicated new and used tubes as well as shorts.
So my questions is this, might the setup data be wrong. All that changes
from a 12AX7 is the plate load goes down one click and even testing it as
a 12AX7 it only passes minimally. Could there be some reason other than
DECEPTION on the part of the seller as to why this tube is failing. HYPE
(grandiose marketing) in my book is as good as deception. We're talking
this tube has seen at least 1,000 hours to not be in the green on my
tester. That far exceeds using a tube briefly not liking it and still
claiming it's NOS.
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Here is what I wrote the seller:
Got the tube today. It was boxed very nicely and shipped promptly. The
5814 doesn't pass as per the photos of it being tested. There is no
leakage and there are no shorts so somehow this tube is testing as well
used as opposed to New Old Stock.
Any enlightenment or commentary would be appreciated. I am not the end
all know all regarding tubes and any information you can provide regarding
how you acquired it, stored it etc. might lend an explanation to why the
tube fails.
------------------------------------------------------------
Do I return it or do testers sometimes not tell the whole story and this
tube may very well be NOS - the getter flashing is 110% intact and thick.
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