Tung-Sol 12AX7 ECC83 Russian Reissue Vacuum Tube - Closely Balanced B&K 747 Tested
$29.95
Genuine Tung-Sol 12AX7/ECC83 high-gain dual-triode vacuum tube manufactured in Russia. This is a modern-production Tung-Sol reissue and is not represented as an original vintage American-made Tung-Sol tube. The original tube markings show substantial handling and age-related wear but remain partially visible.
This individual tube was bench tested on a B&K Model 747 Dynamic Mutual Conductance Tube Tester. Both triode sections tested solidly within the GOOD range at approximately 75 on the tester scale. The two sections produced nearly identical readings and are closely balanced.
The 12AX7 is a nine-pin high-mu dual triode commonly used in guitar amplifiers, bass amplifiers, hi-fi equipment, stereo systems, microphone preamplifiers, voltage-amplifier stages, driver stages, and phase-inverter circuits. The tube shown in the photographs is the actual tube being sold.
Historical Note: Tung-Sol was originally an American vacuum-tube manufacturer whose tubes became widely used in radio, television, audio, and musical-instrument equipment. The Tung-Sol name was later revived for modern-production replacement tubes, including this Russian-made 12AX7 reissue.
Origin Tracker
Bench Stock
Pulled from RF Boneyard bench/service stock for practical repair and restoration use.
Pipeline quantities are informational and may change after arrival, inspection, sorting, testing, or donor teardown.
Compatible Radios / Boards
Compatible with equipment designed for 12AX7, 12AX7A, ECC83, 7025, and equivalent nine-pin high-gain dual-triode vacuum tubes where circuit requirements permit. Common applications include guitar amplifiers, bass amplifiers, hi-fi amplifiers, stereo equipment, tube preamplifiers, microphone preamps, voltage-amplifier stages, driver stages, and phase-inverter circuits. Buyer should verify the required tube type before installation.
RF Boneyard Bench Notes
Tested on a B&K Model 747 Dynamic Mutual Conductance Tube Tester. Triode Section 1 tested at approximately 75 within the GOOD range. Triode Section 2 tested at approximately 75 within the GOOD range. Both triode sections produced nearly identical readings and are closely balanced. Heater operation confirmed and no shorts indication was observed during testing. Noise and microphonics were not evaluated. Actual tube and test photographs are included.
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