6AB4 / EC92 BLACK PLATE
Quality miniature glass amplifier tubes manufactured in the United States by RCA. These wonderful 7 pin triode tubes, designed as HF oscillators or RF amplifiers, come with black plates and top getters. They are glass etched 6AB4 U.S.A. and printed in white RCA ELECTRON TUBE with old style RCA logo, and various codes. Boxes are standard RCA red and black printed 6AB4. Photo is typical of available inventory.
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