📦 Overview: GE 12AT7 (Communications Grade). Type: Dual triode. Transconductance (Gm): ~5500–6000 µmhos per triode. These are very special COMMUNICATIONS GRADE 12AT7 twin triodes. THESE TUBES ARE COMMUNICATION GRADE.
eBay
HERE WE HAVEAN 12AT7 VACUUM TUBE TESTED ON A 539C TESTER A GREAT SOUNDING TUBE FOR A GREAT PRICE. IF YOU ARE LOOKING FOR THE BEST SOUND FOR YOUR AMP LOOK FOR THE OLDER TUBES. IF YOU ARE LOOKING FOR THE BEST TESTING ON THESE TUBES LOOK FOR THEM THAT HAS BEEN TESTED ON A QUALITY TUBE TESTER.
eBay
Tested on a Hi End Maxi-Preamp II tester for Gain (Mu), Transconductance (Gm), and Noise (dB). It most likely is because it has a lower gain compared to the 12AT7. Gain (Expected Value=40 mu). This is very important!
eBay
NOS GE 5965 E180CC 6829 7062 12AT7 MIRROR-MATCHED PAIR NEW TUBES 120%/120% NEW! (# 295135310495 ). 5965 = E180CC = 6829. 5965 IS A SENSIBLE EQUIVALENT TO E180CC - 6829 - 7062 - 12AT7. Premium quality dual triode, similar to the E180CC.
eBay
Qty 10) tubes total. 5- GE 6201 2- GE JRLV 12AT7WB, 2- Sylvania 12AT7WA, 1- Raytheon 12AT7WA. These tubes have all been tested on Hickok testers in very good condition, some near or like new . Complete satisfaction with these tubes or return for full refund.
eBay
5 Vintage 12AX7 Tubes, All test between 56 and 86 where 50 is good on my tv-7 Boxed RCA TESTS 72/80 Raytheon tests 80/86 Remaining three test 56/80
eBay
One tested 5751, still able to make out some of the date codes ect. Test results pictured. I will package properly and ship promptly.
eBay
12AT7/ECC81 GE GENERAL ELECTRIC VINTAGE TUBE NOS NIB Matched(1972)).
eBay