Discriminating Test Results from AMPLITREX Tube Tester. AMPLITREX AT-1000. One Excellent EI 12AX7 ECC83 Tube. Strong EM > Long Life. GM Takes Precedence Over EM. EM[%]: 150/133. Strong GM for the Twin Triodes.
12AX7A ECC83 RCA radio audio amplifier vacuum tubes 3 valves 12AX7 EH May 68 NOS
2 – RCA 12AX7A ECC83 RCA vintage vacuum tubes, made in USA grey ribbed plates date codes EH (May 1968) tubes have not been tested
12AX7A ECC83 RCA radio audio amplifier vacuum tubes 3 valves 12AX7 EH May 68 NOS
2 – RCA 12AX7A ECC83 RCA vintage vacuum tubes, made in USA grey ribbed plates date codes EH (May 1968) tubes have not been tested
12AX7A ECC83 radio audio amplifier electron vacuum tube valve Germany 12AX7
Tube has grey smooth plates, top O getter, tube tests: 94, 88 %.
Raytheon 12AX7A Japan Audio Tube NOS – Tested New Strong 1974 Date Code
Just got these from estate, great NOS. See Photos.
12AX7A/ECC83 Mullard Red Tip 163 B9B4 etched code NOS/NIB MaxiPreamp2/TV7 tested
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
12AX7A/ECC83 Mullard Red Tip 163 B9B4 etched code NOS/NIB MaxiPreamp2/TV7 tested
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
Amperex 12AX7A / ECC83 Disc Getter Preamp Tube B & K 606 Tested Excellent Logos
Excellent looking tube tests good for emissions @ 89/87 on B & K Dyna Jet 606 tube tester. Tests 25/28 GM on B&K 700 mutual conductance tube tester. See photos for test results. Tube has a date code of 71-15.
Gold Pin 12AX7A WTC made in Taiwan NOS/NIB MaxiPreamp2/TV7 Tested ( 1 )Tube Lot
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
1 RCA 12AX7A Vacuum Tube – 1970’s Vintage ECC83 Audio Twin Triode
1 RCA 12AX7A ECC83 Vacuum Tube.