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RE: Out of curiosity

Posted by Mendel on January 28, 2011 at 12:23:51:
Hi Stu:
They are the ones with the D shaped getter with a double getter holder The Labels are pretty much gone, but one says MADE IN GREAT BRITAIN on it and the other has the faint remains of a Mullard logo with ECC83 marked below it and BVA in a circle below that.
The codes I see on the bottom of the tubes are B8J(or possibly BBJ)and B8L (or BBL).
They are obviously not NOS, but they test about 80%-85% on my Stark 12-22 tester (Canadian Hickock), and the 4 sections on the two tubes match very well.They test well, I'll give them that.
A very famous,much sought after tube. Wonder what they are worth? To bad they sound like shht in my application. In a pre-amp, they could be awesome. But I kinda doubt it.