Hi John,
I have seen B7971s bearing signs of heavy use and other looking 'like
new'. They all have the gray fading and its extent seems not correlated
with the state of the tube. Personally I don't believe that the gray is
a sign of use.
Marcin
On 08/03/2016 21:00, Quixotic Nixotic wrote:
Dear Nixiephiles,
I came across a french B7971 ad a while back on Ebay that claimed the
tubes were all new and they were packed in an original styrene tray.
So this makes me ponder the following points:
1] They probably did not come from the usmintquarters source, as they
were neatly packed in an original tray, not newspaper.
2] I have heard it said that the grey/gray around the cathodes shows
that a tube is used and not in fact new. The reason for them being in an
original styrene tray is presumably because the old tubes were put in
the new tray after the tubes were swapped out, which brings me to point 3.
3] Has anyone ever seen a B7971 that does NOT have the grey around the
cathodes, thus indicating that it is new? I have never seen a single
example myself.
John S
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