Sylvania etc. Tight Matched Pair (2) 6V6GT/G Beam Power tNOS AT1000 TESTED Vacuum Tube greyglass WWII era 6V6 Audio 1938-1942

This listing is for a Tightly-Matched (3%) Pair (2) of 6V6GT/G Beam Power 6V6 vacuum tubes in the straight-walled glass tube shape. They have a black bakelite octal base, grey or black glass from a coating used as an RF shield in early tubes, black plate, and bottom getter.  Labels in stock include Sylvania, Ken-Rad.  If you're looking for a particular brand, please message right as you order - we pack and ship quickly!

Your tubes have been fully tested on a computer-regulated, USA-made Amplitrex AT1000 on Fixed Bias setting with like new, NOS results (tNOS). Here's what that means: to qualify for this listing, several stringent conditions must be met: The plate current must measure between 36 mA and 54 mA AND transconductance must measure between 3280 uMhos and 4920 uMhos, consistent with original 1938 RCA, Sylvania, GE, and/or Tung-Sol datasheet specifications for new tubes of this type. The tubes must also show no shorts, show a gas current less than 4.5 mA, and a heater-to-cathode leakage of less than 10 microamps (10 uA). The tubes might have mechanical wear or have the label rubbed off - these are very old! Used-testing tubes are available in a separate listing at a significant discount.   Every tube you receive from Sound By Doc is guaranteed against failure for 60 days after purchase, an industry extreme!

OPTIONS (use offer feature in Reverb):

Want a regular white box? $1 extra per tube

Want a tube that's packed in its original box? $3 extra per tube

Want the test results recorded on your box, too? $3 extra per tube