i've been thinking about getting a 6F8G to 6sn7 adapter and buying some 6F8G tubes. there should be no problems since they're the same from what i've read, right? this is the adapter i plan to buy
thanks spacequeen7. i sent them an e-mail asking for a 5998 replacement with higher test ratings and used this thread (and your post) as a reference in my e-mail. now i wait to see how they will reply tomorrow. i mean their site says they store NOS and factory-new tubes. i knew the test results looked concerning and your post only confirmed my suspicion.
both of those links don't mention a TS black glass 6sn7gt square plate. the second one doesn't even review a black glass at all. the reference thread only mentions a round and oval plate. more specifically on how the round plate sounds. i've looked through it before.
the tung sol 6sn7gt black glass SQUARE PLATE is NOT the same as the mouse ears physically. they're different. i searched the 6sn7 thread before and only saw mentions of TS producing a BG square plate but nothing on how it sounded like compared to the round and oval. unless you were quoting neogeo333 for the TS mouse ears. you stacked our quotes on top of each other making it seem like you were replying to both of us with those answers.
5998 came in from vacuumtubes yesterday. the test result sticker on the box show as
gm - 13.25 / 13.55 85%
plate current - 71.1 / 66.4 70%
brand - Tung Sol
construction - Black Plate
i'm guessing those are indeed NOS levels like their site says? i don't know much about testing tubes or reading tube test results. i'm a happy guy with the 5998 aside from being a little bit concerned about the test sticker result