12AX7
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CLEAR TOP LONG BLACK PLATE
Heres a rare clear top black plate labeled Baldwin.The blackplates and most tubes made for organs are very quiet.Made in Canada.I have not seen many of these tubes out there.I very sweet tube indeed.
30$
MADE IN USA SYLVANIA 12AX7
Heres a nice long gray plate Sylvania.Still looks new.Still strong.Tested 83 on both sides.Recommended for guitar  or vocal pre amps.
30$
SYLVANIA
Again the black plate version of these tubes are being aggressively hunted down to extinction. Sylvania greyplate and military versions are also very nice,clean smooth and bright.A good choice for hi fi ,guitar or vocal pre amps.USA made tubes are a nice surprise with their low prices as compared to the European types.
GE
MULLARD
AMPEREX
TUNG-SOL
RCA
TELEFUNKEN
BRIMAR
WESTINGHOUSE
12AU7
None available
12AT7
6SN7
SYLVANIA 6SN7
Two Sylvania 6SN7s
Vintage stock.Fifties or possibly late forties.
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SYLVANIA 12AU7
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SYLVANIA 12AX7
Heres a nice long gray plate Sylvania.
25$