[flipper]

On Fri, 31 Aug 2012 08:23:50 -0700 (PDT), JimK
wrote:

I want to sell these to help finance buying a new amp. Looking on Ebay I see they are not the holy grail RCA which are the black plates. Mine have gray plates, the flashing on top not on the side, RCA is on the glass, not the base, and 6L6GC is on the glass but not in the stop sign like the black plates. They are really new, given to me by an engineer in the research lab I worked in in 1990. The boxes (red and white, not red/white/black like black plates) are new, and the pins are obviously new.

So I'm disappointed these are not the holy grail tube and wonder what they are worth? Are they close to as good as the black plates? If they won't bring much maybe I should keep them for my McIntosh and Fenders if they are better than new tubes?

Thanks for your advice.

Generic NOS (RCA, GE, etc) 6L6GCs go 'retail' for, say, $70 each
(tubedepot) but can be readily had from online 'warehouse' tube
sellers for $38 each (ABCvacuumtubes). I'm not sure what 'matching'
would be worth.

The problem with an individual selling is just 'looking' new doesn't
prove they work and experienced buyers would generally look for test
results, as well as a 'money back' guarantee. The same goes for
'matching': a test sheet showing the match.