Matched Pair Raytheon 6SD7 6SD7GT JANCRP6SD7GT Vacuum Tubes Milspec NOS NIB Korean War-Vintage M Garfield Cook 60 and 60 where minimum

60 and 60 where minimum (65%) is 40

new in box milspec RCA 12SG7 JAN-CRC-12SG7 tube tested to spec on our Paul Hart-calibrated TV7/U

Bottles: tall

please select “2” from the quantity box

Matched Pair Raytheon 6SD7 6SD7GT JANCRP6SD7GT Vacuum Tubes Milspec NOS NIB Korean War-Vintage M Garfield Cook 60 and 60 where minimumThis new old stock, new in box matched pair of Raytheon 6SD7GT JAN CRP 6SD7GT pentodes was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 22 where minimum (65%) is 15. This Korean War vintage tube has US Army Signal Corps SC 402 contract codes and 1 44 date codes. I am playing them in my Musical Paradise MC 3 single ended integrated amplifier as I write with Aimee