RCA ONE (1) JAN-5879 military tNOS AT1000 TESTED Vacuum Tube Boxed pentode 1960-1976

This listing is for one (1) RCA-made JAN-5879 pentode military vacuum tube in the standard tube shape. It has a B9A 9AD noval 9-pin base, shiny plate, and top square or halo getter.

Some have triple mica, most are newer 2-mica design. All have military box included.

Your tube has 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 transconductance for each section must measure between 800 uMhos and 1200 uMhos, consistent with original 1960 RCA, Western Electric, Sylvania, GE, and/or Tung-Sol datasheet specifications for new tubes of this type. The tube must also show no shorts, show a gas current less than 0.18 mA, and a heater-to-cathode leakage of less than 10 microamps (10 uA). The tube 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 the test results recorded on your box, too? $3 extra per tube
Want two tubes that match one another within 10%? [Matching is based on plate current for power tubes and GM for all other tubes] $5 extra per tube.
Want two tubes that match one another within 4%? [Matching is based on plate current for power tubes and GM for all other tubes] $10 extra per tube