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heptode 1H33 Tesla - (NOS)
1H33 Tesla is a miniature pentagrid converter (heptode) tube with a directly heated oxide cathode. It was primarily designed to act as a combined local oscillator and mixer in battery-operated superheterodyne radios. Direct replacement for the 1R5T tube. New old stock and tested. Year of production: 1954.
(we reserve the right to change the description and specifications without prior notice)