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RADIOHF - Heathkit DX-40 Transmitter Heathkit DX-40 Transmitter First serviced (RTO Electronics, Benton Harbor, MI) and put back on the air in 2007. In 2020 the following work was completed: · Power Transformer replaced · Replaced RF Chokes, Rectifier,final, audio amplifier tubes & Filter Capacitors · Added Dual Fuse plug on AC Power cord and two-pin mic connector · The 2007 & 2020 restoration details will be provided · Includes original DX-40 Assembly Manual Considering it’s 65-year history, this is an extremely “clean” transmitter inside and out-See Images Variac tested last week over a 4 day period $145.00 + $40.00 shipped only within the continental U.S. Additional info & images available upon request Listing #1749762 by W1PD Last Edited on 11/17/25 Submitted on 11/17/25 Submitted from syn-071-073-038-186.res.spectrum.com Click to Contact Back to Previous Page

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