Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes NOS NIB Matched Pair 1622 Transconductance readings are indicated on

Transconductance readings are indicated on the tops of the tubes

Detector and First Audio 12AV6

This milspec CBS-Hytron USN-CHY-5Y3WGTA / 5Y3 black plate rectifier tube was tested on our Paul Hart-calibrated TV7/U for shorts

The spine is in fine shape with no loose pages and APPEARS to be leather-bound

Matched Pair General Electric GE 6BL7 6BL7GTA Vacuum Tubes NOS NIB Matched Pair 1622 Transconductance readings are indicated onThis 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