408A / 6028
Top of the line miniature glass pentode tubes manufactured in the United States by Western Electric. These fine 7 pin tubes are designed for amplifier service at high and ultra high frequencies. They come with black plates and top getters. They are printed in yellow WESTERN ELECTRIC 408A MADE IN U.S.A. 7626, indicating 1976 production. They are boxed in standard WE blue and white boxes printed 100793090 408A 9-76. New Bulk tubes have variable 1960's and 1970's production codes.