EXCELLENT NEVER INSTALLED CONDITION.
Item Tag: 6SN7GTB
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Matched Pair 1956 GE Side Getter 6SN7GTB Tubes STRONG! 6SN7
Matched Pair 1956 GE Side Getter 6SN7GTB Tubes. These tubes test 84/84 and 85/85 where a new tube tests 85/85.
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RCA 6SN7GTB Black Plate Side Getter Vacuum Tube Strong 3600/3500 Test
Tube features the desirable black-plate construction and side getter noted on the original storage bag. ● Section 1: 3600. ● Section 2: 3500. Tube is sold as pictured.
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RCA 6SN7GTB Vacuum Tube Vintage Tested Good in GE Box
Model 257 tester on 6/25/26. Old masking tape on tube and box is marked “6SN7GBT”.
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Set of 3 CBS 6SN7GTB & CBS Hytron 6SN7GT Vacuum Tube
The gentleman was a repairman. We do not know anything about these tubes. We will picture them to the best of our ability and note #’s when found. In addition to the tubes there are 5 cases. One original box, one loose.
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4 x 6SN7gtb Sylvania/Philco Tubes*Chrome Dome*Very Strong Quad*1950s*#17
4 x 6SN7gtb Sylvania Tubes. Made in USA for Philco. Tested on Enhanced Triplet E3444 Laboratory Tester. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable.
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Pair of Westinghouse 6SN7GTB NOS NIB 1964 Tall Glass Tubes #2 – 7% matched
Outstanding pair of Westinghouse 6SN7GTB tall glass tubes, with original boxes. Gm matched to about 7% difference, and tested quiet & non-microphonic on the Amplitrex AT1000. Identical 1964 date codes.
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6-SYLVANIA 6SN7GTB Twin Triode Chrome Top! Black Plate! HICKOK TEST GREAT!
These tubes have black plates and top halo getters with excellent silver getter flashing on each tube. The tubes have production codes as follows:6-13, 413, 322308, 626 and 552. Mutual Conductance test readings are as follows: 2300/2000, 1650/2150, 2150/1800, 2450/2600, 2350/2250 and 2350/2350.
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(2) Sylvania Philco 6SN7GTB Tubes Chrome Dome 3 Hole Black Plate Test Strong
Tube 1 Emissions 103% & 92% | GM 88% & 88%.