5U4G NATIONAL UNION VT-244 JAN 5U4 PLAIN CHARCOAL ANODE
This beautiful Joint-Army-Navy ex military device is ex equipment but gives a full emission test on our AVO VCM163. It has the plain charcoal anode electrode cage with tape filaments ( "hanging filaments") and a pinch located D getter with a deflector foil. A very nice valve indeed - and considered along with the Ting-So, variant to be the finest of all US "big gun" octal rectifiers. Keenly sought, well, here's one on offer today!
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5U4G, PHILCO ,5 RIB ,CHARCOAL ANODE, 5P DATE CODE, M-R PRINT, 1955 PRODUCTION 5u4