5 MATCHING NOS NIB SYLVANIA USN (US NAVY) CHS5963 VACUUM TUBES (12AU7)5 MATCHING NOS NIB SYLVANIA USN (US NAVY) CHS 5963 VACUUM TUBES (12AU7) FULL SLEEVE TV-7 TESTED NOSI HAVE A FULL SLEEVE (5) NOS SYLVANIA USN CHS 5963 (12AU7) VACUUM TUBES WITH MATCHING PRODUCTION / DATE CODES OF "AFR 6345" OCTOBER, 1963. THESE HAVE GRAY PLATES, GREEN PRINT AND THE TOP HALO GETTE...75.00

5 MATCHING NOS NIB SYLVANIA USN (US NAVY) CHS 5963 VACUUM TUBES (12AU7) FULL SLEEVE TV-7 TESTED NOS [Expired]


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I HAVE A FULL SLEEVE (5) NOS SYLVANIA USN CHS 5963 (12AU7) VACUUM TUBES WITH MATCHING PRODUCTION / DATE CODES OF "AFR 6345" OCTOBER, 1963. THESE HAVE GRAY PLATES, GREEN PRINT AND THE TOP HALO GETTER. THESE TUBES WERE MANUFACTURED FOR THE UNITED STATES NAVY ("USN"). THE CHS STANDS FOR "CONTRACTOR HIGHGRADE SYLVANIA". AS THESE ARE A LONG LIFE MILITARY GRADE TUBE WITH AN EXCELLENT REPUTATION. RARELY SEEN WITH A FULL SLEEVE WITH MATCHING DATE / PRODUCTION CODES!

THESE HAVE ALL BEEN TESTED ON MY CALIBRATED TV-7 D/U TESTER WITH THE FOLLOWING RESULTS: 105 / 105 106 / 110 104 / 98 102 / 103 102 / 108 THIS IS WHERE 56 IS MINIMUM GOOD AND 86 IS MINIMUM NOS. SHIPPING IN THE CONTINENTAL USA WITH INSURANCE IS A FLAT $7.
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bhauge423 

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