71A Radio Tube UX-171A or UX-271A. Used as a final output tube in many early radios. Prices are:
71A ST shaped tube by Various Brands 30.00; RCA/Deforest/Tungsol 35.00
71A GLobe shaped 40.00; RCA/Deforest/Tungsol 45.00
Price: $ 35.00 Shipping: $ 8.00 (U.S.Only, Please email for international rates)