Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes NOS NIB Matched Pair 1622 It measured 58/56 where minimum

It measured 58/56 where minimum (65%) is 40/40 and 100% is 62/62

Wish I knew who actually made them

These three GE GE 5-Star industrial 6265 tubes tested to spec on our Paul Hart-calibrated TV7/U

ETSY DOES NOT HAVE A SYSTEM IN PLACE FOR THAT YET

Transconductance readings are indicated on the tops of the tubes

Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes NOS NIB Matched Pair 1622 It measured 58/56 where minimumThis new old stock, new in box (For Tube One) matched pair of GE MANUFACTURED 6BL7GTA dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 49 50 for Tube One and 50 50 for Tube Two (RCA LABELED). where minimum (65%) is 25 25 and 100% is 38. 5 38. 5. They have O getters; copper support rods; great flashing; stout black plates; anode radiators for cooler