Check the listing for details. HALLICRAFTERS SR-400 6HF5 (2) Driver Primo Tube Set. Condition: Used. Listed at 79.97 USD. SR_400 final power amp tubes: 6HF5 (2). 6HF5 (2) - matched plate current pair. Complete Primo tube including all receiver and tansmitter tubes wth matched power amp tubes - rtube your radio and start hearing and working DX again!
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