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.
Item Category: Vintage Electronics
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(2) Tung-Sol Motorola 6SN7GTB Tall Bottle Black Plates Horseshoe Getters Strong
(2) Tung-Sol Motorola 6SN7GTB Tall Bottle Vacuum Tubes | Black T Plates | Horseshoe Getters. Tested on an Amplitrex AT1000.
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4- Raytheon 6SN7GTB Vacuum Tubes 0-Getter Black Plate TV7 Tested NOS
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
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Sylvania 6SN7GTB Vacuum Tube Red Print USA 2500/2400 Estate Tested
● Sylvania 6SN7GTB vacuum tube. Prior-owner test readings written directly on the glass are 2500 / 2400. NOTE: Original handwritten identification and test notes shown on the tube, box, or storage bag are from the late William “Billy” Odell’s personal collection and records.
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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 x 6sn7gtb RCA Tubes*Black Plates-D*Clear Glass*Very Strong Matched Pair*#14
2 x 6sn7gtb RCA Tubes. Tested on Enhanced Triplet E3444 Laboratory Tester prepared by Paul Hart of Roswell Ga. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable.
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Raytheon 6SN7GTB vacuum tubes tested & guaranteed
Raytheon 6SN7GTB Vacuum Tubes. For sale I have a pair of identical US made Raytheon 6SN7GTB vacuum tubes. Tubes carefully tested for transconductance, shorts, gas, life and leakage. No tube is sold that has any gas, leakage or fails life and strength tests.
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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.