1 Vintage
Sylvania
5692
Brown Base
Audio Tube
NOS NIB
USA

Buyer the exact tube in the photos.  This tube was tested in my Military Hickok Cardmatic to make sure these were perfect.   All the tests were excellent.  This tube was made in the USA, by Sylvania, in 1957.  This is the military Industrial grade version of the 6SN7GT tube. They will bring great clarity, a good mid-range and a deep bass to your audio amplifier.  
These are getting scarce and are a high end tube used by most of the professionals.   Great for any audio amplifier.  These tubes are what audiophile enthusiasts are looking for.  The tube will come in it's original Sylvania 5692 box.  This tube is NOS (New Old Stock), from US Military bulk stock.  

Sylvania code:  DK (1957)

Test results:  80/80 (2800/2800 GM), whereas minimum good is 50/50 (1750/1750 GM).   This tube tests as NOS.

SHIPPING & HANDLING -  USA:
I will use USPS Priority Mail.

Note: Item will be packed, in a professional manner
and ready to ship, within 1 days of payment.  I have great feedback on my packing.

No Returns!  This is an NOS (New Old Stock) tube!