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1. 9 Vintage 12AT7 / 12AU7 Vacuum Tubes - Amp Tested - GE Philips RCA Mullard WU

   2 - General Electric 12AT7. 1 - RCA 12AT7. 2 - Unknown 12AU7.

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2. (4) GE 12AT7 ECC81 Audio Radio Valve Preamp Tube NOS W / Sleeve

   (4) GE 12AT7 ECC81 Tube. NEW IN Original BOX With Sleeve.

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3. Gm Tested NOS NIB QUAD GE 12AT7 Audio Amplifier Tubes

   Here's a NOS quad of GE 12AT7 tubes On my B&K 747 gm tester where the reading is shown in percent of NEW tube value, these test as follows:118-125, 125-115, 110-125, and 106-120. It may or may not work at all when you get it!

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4. MATCHED 1950s Vintage Boxed Pair 2 GE 12AT7 ECC81 SQUARE "D" Getter TEST STRONG

   These have the earlier SQUARE "D" getters with short, grey plates. CLEAN tubes with nice straight pins. Test STRONG! Results (mhos) I have two of the best tube testers ever made that I use to fully test tubes.

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5. One GE 12AT7 ECC81 Tube NOS NIB Grey Plates GM[%]: 96/96 AMPLITREX

   One Excellent GE 12AT7 ECC81 Tube. Discriminating Results from the AMPLITREX Tube Tester. AMPLITREX AT-1000. Grey Plates. Strong & Balanced GM. GM Takes Precedence Over EM. GM [%] : 96/96. Strong EM > New Tube, Long Life.

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6. NOS GE 12AT7WC 1975 HEAVY CONSTRUCTION GRAY PLATES TUBE, TV-7DU TESTED #A-24

   ONE NOS GE 12AT7WCTUBE. GE DATE CODE, 75-18 (1975 WEEK 18). THIS TUBE TESTED 80/86 @ 4000/4300 micromhos.

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7. GE 12AT7 Tube TESTED 98/98 Square Tilt Getter Gray Plate ECC81 6201 Fender Amp

   Tube Type: 12AT7 / ECC81. This is a high-quality 1950s-era GE 12AT7 featuring the distinctivesquare tilt getter that slants toward the top mica—a classic hallmark of GE's premium early production. It tests at a very strong and balanced98/98 on my Sencore TC-109.

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8. NOS MATCHED PAIRS GE JAN 6AB4/(1/2 12AT7)HICKOCK TESTED/(2 available)

   NOS MATCHED PAIRS GE JAN 6AB4/(1/2 12AT7)HICKOCK TESTED/(2 available)

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