RCA ONE (1) 5DJ4 rectifier tNOS AT1000 TESTED Vacuum Tubes hi-Voltage 5U4 Audio 1956-1962

This listing is for One (1) 5DJ4 rectifier hi-Voltage 5U4 vacuum tube in the Straight-walled Glass tube shape. It has a black bakelite octal base, black plate, and side halo getter.

Your tube has been fully tested on a computer-regulated Amplitrex AT1000 with balanced elements and like new, NOS results (tNOS). Here's what that means: to qualify for this listing, several stringent conditions must be met: The forward voltage drop (associated with sag) in the two sections must be balanced within 10% of each other, and that voltage must be between 21 and 28 Volts for both sections, consistent with original 1956 RCA, Sylvania, GE, and/or Tung-Sol datasheet specifications for new tubes of this type. The tube must also show no shorts. The tube might have mechanical wear or have the label rubbed off - these are very old! Unbalanced and 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