2 RCA 7058 (12AX7 12AX7A ECC83) Vacuum Tubes NOS NIB NEW factory matching codes
2 RCA 7058 (12AX7 12AX7A ECC83) Vacuum Tubes NOS NIB NEW USA factory matching codes on each tubepro Sencore tested You get both tubes for your purchase. NOS NIB NEW USA. Motorola boxed.NOS NIB NEW USAfactory matching code “71-52, 274” on each tubeRCA “274” manufacture codeorange labeltype 7058 is a high-mu twin triode that is a mobile designed 12AX7 ECC83 variant. It is used in audio preamp equipment well as commercial, mobile, and military communications equipment.Photos show all 4 triode sections testing strong emission on our pro calibrated Sencore TC28 Mighty Mite tube tester. No shorts or leakage. Perfect Life Test. [INV2]
2 RCA 7058 (12AX7 12AX7A ECC83) audio Tubes NOS NIB NEW factory match code 72-43
2 RCA 7058 (rare variant of 12AX7 12AX7A ECC83) Vacuum Tubes NOS NIB NEW USAfactory uniform constructionfactory matching codes on each tubeall pro Sencore tested You get both tubes for your purchase. Motorola boxed, made by RCA.NOS NIB NEW USAfactory matching codes “72-43, 274” on each tubeuniform constructiontype 7058 is a high-mu twin triode that is a mobile designed 12AX7 ECC83 variant. It is used in audio preamp equipment well as commercial, mobile, and military communications equipment.Photos show all 4 triode sections testing strong emission on our pro calibrated Sencore TC28 Mighty Mite tube tester. No shorts or leakage. Perfect Life Test. [INV2]
2 RCA 7058 (12AX7 12AX7A ECC83) audio Tubes NOS NIB NEW factory match code 76-17
2 RCA 7058 (rare variant of 12AX7 12AX7A ECC83) Vacuum Tubes. No shorts or leakage. NOS NIB NEW USA. Motorola boxed, made by RCA. factory uniform construction.
7058 RCA GENERAL ELECTRIC VINTAGE AUDIO TUBE 12AX7 NOS NIB (1970) #12A22
These are very rare tubes, and coveted by audio enthusiasts globally as an alternative to 12AX7 tubes. Otherwise the data sheet specs are similar. Triode #1 – Plate Current = 1.49mA Rp = 50310 Gm = 1867 Mu = 93.9 Corners = PASS.
Three Vacuum Tubes – Two 12AT7 And One 7058 (12AX7 ECC83) Tested Good
These tubes have been tested functional on an emission tester. Thank you for looking.
NOS NIB RCA 7058 Sub for 12AX7 ECC83 O Getter Amplifier VACUUM TUBE 4.9218
Model 7058. Tube Type Dual Triode. Variant Sub for 12AX7. Getter O Getter. Common Use Preamp, Amplifier, Audio. Condition NOS. ALL TUBE AUDIO. Tube Specifications.
