All tested on a professionally calibrated TV7BU tube tester with the following results (50 is minimum): Tube 1- 90/96 Tube 2- 96/90 Tube 3- 102/102 Tube 4- 108/106
Item Tag: TV7
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Matched Quad Sylvania JAN 5814A Mil Spec Grey Plate Vacuum Tubes TV7 Tested NOS
All tested NOS and matched on a professionally calibrated TV7U tube tester with the following results (56 is minimum): Tube 1- 98/98 Tube 2-98/98 Tube 3- 98/96 Tube 4- 97/97
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12AX7 ECC83 Tung Sol Tubes Ribbed Short Plate NOS Matched Pair. TV7 Test. E-1&2.
12AX7 / ECC83 Tung-Sol Tubes. Made In Russia. 12AX7 Minimum Range: 32. 12AX7 Nos Range 45 +. No universal test result defines NOS. Ribbed Short Plate. NOS tubes fall within the GM range published in the RCA Receiving Tube Manual; variation above/below average is normal.