Balanced Pair #227 Balloon Vacuum Tubes^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^***** Tested on our proprietary tester , the E3444.Its a Triplett 3444 that has been enhanced.This tester uses regulated power sources for the bias, plate, & screen voltages, as well as modified operating & testing procedures.Filament voltage is also controlled. Tubes are tested in accordance with the manufacturers specifications; measurements closely align with a laboratory tester built to rigorously measure vacuum tube characteristics. Tubes can be accurately matched for gm & plate current at the manufacturers specified test points or at other specified test points.***** This tester was prepared by Mr. Paul Hart of Roswell, GA ***** ********************************************************************* Industry Bogey transconductance =975µmhos Industry Bogey plate current =5.2mA Results = 840µmhos ~3.6mA =875 µmhos ~ 4.0mA ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ USA Shipping $6I have many other types of tubes ~ No Additional Shipping ChargesAll tubes GuaranteedThank you ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirls Guaranteed VintageTubes 801

- ------------- Description - ------------- US NATIONAL UNION 27 match pair TUBES IN ORIGINAL BOX 27 can replace 127 227 D Getter Engraved Base ST This test value is from the TV-7 tester (27 MINI-mum value is 25) Please check my picture for more details Z6032 Suitable for speaker, amplifier,CD player etc. - ------------- Payment - ------------- The terms of payment we accept: PAYPAL If you have any questions, please feel free to contact me - ------------- Shipping - ------------- When I receive your payment. I will send your items within 1-3 days We provide professional packaging services to ensure that you receive your items safely. - ------------- About postage - ------------- If you purchase multiple items from our store, we offer combined shipping to save you money. - ------------- About us - ------------- Quality merchandise and customer service is our primary concern. Many of our customers come back to us again and again because of our integrity, fair prices, and excellent customer service, regardless of where they live in the world - ------------- Contact us - ------------- Hello.If you have any questions about the goods, please let me know. I will contact you actively. Give you a reasonable solution. I hope we can have a good deal. thank you very much. :?