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- -3.00 USD
Top quality miniature glass heptode tubes manufactured in the United States by Sylvania. These 7-pin tubes are designed as pentagrid converters; combined oscillators and mixers in superheterodyne radio receivers where power is drawn from 12 volt automobile batteries. They are constructed with ribbed silver metal plates, top halo getters, and printed in yellow or green 12AD6 SYLVANIA MADE IN U.S.A.
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