This auction is for (2) 6CA4 / EZ81 RAYTHEON Tubes. NOS tubes. Hickok RD-1575 Tested, Minimum Rectifier test 54/54, Test #1- 153/153, #2- 153/148, Date codes match Q10.The tube boxes are in good condition. I
used my Hickok RD-1575 laboratory tube tester for testing these
tubes. This tube tester has been calibrated by ( Roger Kennedy 2017 ). SEE PHOTO.... If you have any questions or issues after receiving your item, please contact me prior to leaving feedback so that I may address them. Free Shipping in the U.S.