Ken-Rad etc. ONE (1) 5Y3G rectifier tNOS AT1000 TESTED Vacuum Tube hanging filament Coke Bottle 5Y3 1939-1950

This listing is for one (1) 5Y3G rectifier 5Y3 vacuum tube in the ST (Coke bottle) tube shape. It has a black bakelite octal base, black (some ribbed) plate, and bottom getter. Labels in stock include Ken-Rad, National Union, Sylvania. Some of our stock is re-labeled or marked with the OEM of Crosley, Wards Airline, Zenith. If you're looking for a particular brand, please message right as you order - we pack and ship quickly!

Your tube has been fully tested on a computer-regulated, USA-made 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 50 and 62 Volts for both sections, consistent with original 1939 RCA, Western Electric, 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 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
Comfortable with a tube that has tape at the base? Save $1 per tube
Comfortable using a replaced guide pin? Save $1 (and get the replacement guide pin included, installed!)