<div dir="ltr"><div>What cable are you using? (also, what OS and what CHIRP version?) The FT-4X and related radios use a half-duplex connection with TxD and RxD on the same wire. The Yaesu SCU-35 cable works, of course. but if you are using another cable you may need to modify it. I use a trivial connection via resistors to the serial port on a Raspberry Pi.</div><div><br></div><div>I need to get back into CHIRP programming, so I guess I'll fire up my FT-4X and play some more.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Aug 15, 2019 at 4:11 PM John Higby <<a href="mailto:KJ7HEL@hotmail.com">KJ7HEL@hotmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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New..Yaesu FT-4X...never been programmed, won't download & doesn't offer an Upload option. Chirp starts ...then error...failed to communicate with radio: Incorrect ACK on serial report. </div>
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ANY help appreciated.</div>
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73</div>
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John</div>
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kj7hel</div>
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