KEN-RAD JAN- CKR- 6SL7GT VT-229 Black Plate Valve Tube NOS (M59). Tested BK 600 = 85/85 Hickok quality test 1950/2100 mhos Mutual conductance 1050/1450 Book mutual conductance 900/1400 No gas shorts grid emissions
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SYLVANIA JAN CHS 6SL7GT VT-229 Valve Tube Used Tested Strong (J9). BK600 test = 85/89 Hickok test = 1600/1650 mhos gm
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RCA 6SL7GT VT-229 Black Plate wire oblong getter Tested 2050/2000 mhos gm No gas shorts grid emissions
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2 X 6SL7GT ULTRON TUBE. GREY PLATES, HALO GETTER, MATCHED PAIR. TESTED IN AMPLITREX AT1000 TUBE TESTER.
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6SL7GT VT-229 Valve Tube. SYLVANIA, Made in USA. Black Plates, Dimpled Foil Getter.
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6SL7GT Grey Plate "D" Getter Brown Base NOS Brimar UK Valve Tubes.
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Reference tube is tested first then the tube listed for sale. Test procedure.
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Lot Of 8 New Old Stock Sovtek tubes (2)6505we (4)El34wxt (2) 6sl7gt. These are new old stock. Never used in the original boxes. Will ship USPS ground advantage
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