Grey plates with “D” getters. These are also known as a 12AX7/CV4004/ECC83 tube type. The printing on both tubes is in superb condition as seen in the photos. Quite rare and highly sought after. Test results are as follows with 32 being the minimum value (65%), low NOS is 42 (85%) and NOS is 49 (100%).
(2) Groove Tubes GT-12AX7-R New Production Tubes Tests Strong Amplitrex
Tested on an Amplitrex AT1000. (2) Groove Tubes GT-12AX7-R New Production Tubes.
Raytheon 12AX7A Japan Audio Tube NOS – Tested New Strong 1974 Date Code
Just got these from estate, great NOS. See Photos.
Realistic Lifetime 12AX7A Japan Pair Gold Pin Preamp Tubes
We cannot be responsible for what tubes test in another tester.
Amperex 12AX7A/ECC83 Heerlen Red Tip MaxiPreamp2/TV-7 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.
Amperex 12AX7A/ECC83 Heerlen Red Tip MaxiPreamp2/TV-7 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.
RCA 12AX7A 1960’s 14mm Gray Plate Tubes PLATINUM MATCHED on AT1000 ECC83 7025
These RCA 12AX7A are one and only tube to have in the V1 slot on any guitar amp. It has that 1960s sound, excellent breakup, and a smoothness that must be heard to be believed! These are the original 1960’s RCA made 12AX7A tubes from the Harrison, NJ.
RCA 12AX7A 1960’s 14mm Gray Plate Tubes PLATINUM MATCHED on AT1000 ECC83 7025
These RCA 12AX7A are one and only tube to have in the V1 slot on any guitar amp. It has that 1960s sound, excellent breakup, and a smoothness that must be heard to be believed! These are the original 1960’s RCA made 12AX7A tubes from the Harrison, NJ.
NOS Matched Pair RCA 12AX7A ECC83 12AX7 7025 USA TUBES TV7 Tested +100%
This pair is well matched and tests very strong. Fully tested on a TV7BU. Minimum good is 32.
RCA 12AX7A 1960’s 14mm Gray Plate Tubes PLATINUM MATCHED on AT1000 ECC83 7025
These RCA 12AX7A are one and only tube to have in the V1 slot on any guitar amp. It has that 1960s sound, excellent breakup, and a smoothness that must be heard to be believed! These are the original 1960’s RCA made 12AX7A tubes from the Harrison, NJ.