EF Johnson Branded Pair of RCA 810 Vacuum Tubes, High Power Transmitting Triodes Used, Tested, in Excellent Condition   **All the tubes I sell are tested and come with a money back, satisfaction...

RCA 810 Vintage Vacuum Tube, High Power Transmitting Triodes NOS in the Original Box #2    This one has a 1958  date code K6 and the older RCA Logo.   **All the tubes I sell are tested and come with a money back, satisfaction...

RCA 810 Vacuum Tube, High Power Transmitting Triodes NOS in the Original Box #1  This one has a 1981  date code 81-30   **All the tubes I sell are tested and come with a money back, satisfaction guarantee**   Each one of the stock I...

RCA matched pair of genuine NOS (New Old Stock) 810 high-power transmitting triode vacuum tubes in Original Boxes Tested   **All the tubes I sell are tested and come with a money back, satisfaction...

Cetron / United / National matched pair of genuine NOS (New Old Stock) 810 high-power transmitting triode vacuum tubes in Original Boxes Tested   **All the tubes I sell are tested and come with a money back, satisfaction...

Cetron matched pair of genuine NOS JAN 810 high-power transmitting triode vacuum tubes Tested   **All the tubes I sell are tested and come with a money back, satisfaction...

Cetron matched pair of genuine NOS (New Old Stock) 810 high-power transmitting triode vacuum tubes in Original Boxes Tested   **All the tubes I sell are tested and come with a money back, satisfaction...

Sylvania Pair of 810 Vacuum Tubes, High Power Transmitting Triodes Used, Tested, in Excellent Condition   **All the tubes I sell are tested and come with a money back, satisfaction guarantee**   Each one of the stock I have, has been tested in...

Ken-Rad JAN 810 Vacuum Tube, High Power Transmitting Triodes Used, Tested, in Excellent Condition   **All the tubes I sell are tested and come with a money back, satisfaction guarantee**   Each one of the stock I have, has been tested in a...

General Electric 810 Vacuum Tube, (GL-810) High Power Transmitting Triodes Used, Tested, in Excellent Condition   **All the tubes I sell are tested and come with a money back, satisfaction guarantee**   Each one of the stock I have, has been...

RCA 810 Vacuum Tube, High Power Transmitting Triodes Used, Tested, in Excellent Condition   **All the tubes I sell are tested and come with a money back, satisfaction guarantee**   Each one of the stock I have, has been tested in a Collins...

This Electron Tube Co Pair (2) 810 Vacuum Tubes, High Power Transmitting Triodes, are NOS with 2005 Date Codes  They were likely made by Shu Guang in China, under the Electron Tube Co. brand.   **All the tubes I sell are tested and come with a...