RCA etc. Pair (2) 3Q5 tNOS AT1000 TESTED Vacuum Tubes Beam Power VT221 JAN-CRC-3Q5 3Q5GT/G 1940-1959

This listing is for a Pair (2) of 3Q5 Beam Power VT221 JAN-CRC-3Q5 3Q5GT/G vacuum tubes in the straight-walled glass tube shape. They have a black bakelite octal base, nickel plate, and bottom foil or square getter. Labels in stock include RCA, GE, Sylvania, Tung-Sol. Some of our stock is re-labeled or marked with the OEM of Philco, Wizard, Radiocoin, Zenith. If you're looking for a particular brand, please message right as you order - we pack and ship quickly!

Some are military.

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 by the power tubes: The plate current must measure between 7.6 mA and 11.4 mA AND transconductance must measure between 1760 uMhos and 2640 uMhos, consistent with original 1940 RCA, Western Electric, 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 0.95 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 tNOS or Used Good 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