12AU7A / ECC82 NOS Baldwin by SYLVANIA Long Gray Plates Halo Getter Tested Tube Made in USA '60s

12AU7A / ECC82 NOS Baldwin by SYLVANIA Long Gray Plates Halo Getter Tested Tube Made in USA '60s AMPLITREX Tested – Low Noise & Microphonics – Vintage American SYLVANIA Production Description This 12AU7 / ECC82 NOS Baldwin by Sylvania, Made in USA 1960 production, represents an American selection of great interest to enthusiasts of quality vintage tubes. Tubes branded Baldwin were intended for high-level musical and professional applications, particularly premium electronic organs, where reliability, low noise, and operational longevity were fundamental requirements. Behind the Baldwin brand, in this case, we find the renowned production of Sylvania Electric Products Inc., easily recognizable by the characteristic construction with Long Gray Plates and Halo Getter. This tube is particularly appreciated by audiophiles for its tonal balance, the naturalness of the midrange, and its ability to offer an engaging musical presentation without artificiality. The tube is in NOS – New Old Stock condition, tested and selected using the AMPLITREX AT-1000 Tube Tester, with an overall result of VERY STRONG, low noise, low microphonics, and 48h Burning Test passed. From an aesthetic point of view, it is in excellent condition, with a well-preserved internal structure and normal signs of aging compatible with an authentically vintage tube. Timbral Characteristics and Sound Description The early 1960s Sylvania Long Gray Plates are appreciated for their balanced, open, and natural sound reproduction, with a very recognizable American musicality. In this matched pair selection, the consistency between the two tubes contributes to a stable, orderly, and very pleasant presentation, ideal for quality stereo systems. Bass The bass range is controlled, articulate, and well-supported. It offers a solid foundation without being intrusive, maintaining rhythm and clarity even in the most complex passages. Mids The mids are natural, clear, and musical. Vocals and acoustic instruments are well-focused, with a balanced and pleasant harmonic texture. Highs The high range is open and clean, with good extension and a smooth, never aggressive presentation. Detail remains well-integrated into the musical message. Dynamics The dynamics are prompt and consistent, with a stable and well-controlled response. The matching of the pair helps maintain tonal uniformity and continuity between the two channels. Soundstage The soundstage appears wide, stable, and well-organized. The consistency of the pair promotes correct instrument separation and a balanced presentation of the stereo image. 🎧 Use in Hi-Fi Stereo Amplifiers This tube is particularly suitable for: tube preamplifiers line stages driver stages integrated amplifiers DACs and tube buffers restorations of vintage hi-fi electronics The Low Noise & Microphonics selection also makes it suitable for the most sensitive positions in the circuit. 🎸 Use in Musical Amplifiers In amplifiers for musical instruments and compatible professional equipment, this 12AU7 / ECC82 Baldwin by Sylvania can offer: excellent operational stability natural harmonic response contained noise low microphonics excellent signal intelligibility These characteristics make it interesting for both studio and live applications. 🎯 Note for Audiophiles and Technicians This tube combines several elements particularly appreciated by enthusiasts: production Sylvania Made in USA brand Baldwin production 1960 Long Gray Plates Halo Getter NOS – New Old Stock Low Noise & Microphonics Burning Test 48h – OK VERY STRONG performance A quality selection that offers the charm of the best vintage American production, with solid performance, high silence, and great versatility of use. Test Results Tubes tested onAMPLITREX AT-1000 Tube Tester Test Conditions: Va = 250V, Vg = -8.5V Average 100%: Gm = 2200 ; Ia = 10.5 mA Test Result: VERY STRONG Tube #19 Section 1: Gm = 2160 ; Ia = 9.2 mA Section 2: Gm = 2100 ; Ia = 8.2 mA Additional Tests Performed Burning Test: 48h – OK Microphonics: Low. Tested and compliant for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1. Balance: The sections are consistent and well-aligned, making the tubes suitable for use as phase inverters in hi-fi and instrumental applications. Emission Quality: Excellent – very strong and stable emission, without fluctuations. Shorts and GAS: Absent. Condition Condition: NOS – New Old Stock – tested and working. Supplied in our custom box for optimal protection. Functionality: Perfectly operational. Cosmetic Condition: Excellent – perfectly preserved lettering, minimal signs of aging. See photos for details. Manufacturing Code: 312 052 → 312 indicates the manufacturer, namely Sylvania Electric Products Inc., Emporium, Pennsylvania. 052 → 0 indicates 1960, 52 indicates the 52nd week of the year. Discover why our tubes are different →