Thank you for your response. Looks like I can down load 1.21.10.9, after download and Extraction I have the message Extraction completed successfully but the header still has 1.19..9.6.
I do have access to the KAT, so will leave it at that for now, too much time waisted. Thank you again and to all those that responded > On Dec 20, 2021, at 8:16 PM, Bob McGraw <[email protected]> wrote: > > Richard et al: > > Just checked my KAT500 and it had V1.75 installed. Then with the KAT500 > Utility, version 1.21.9.15, I did download the firmware from the Elecraft > site and install V2.05 into my KAT500. I saw no issues. Running a Windows > 10 Pro 64 bit computer. > > 73 > > Bob, K4TAX > > > On 12/20/2021 6:18 PM, [email protected] wrote: >> Message: 23 >> Date: Mon, 20 Dec 2021 19:18:48 -0500 >> From: Richard Gilley<[email protected]> >> To:[email protected] >> Subject: [Elecraft] Kat500 Firmware >> Message-ID:<[email protected]> >> Content-Type: text/plain; charset=utf-8 >> >> Hi, >> Having difficulty loading latest version of the Kat500 utility. The >> version I have is 01.75, the utility indicates that 2.05 is available. >> However the new version does not load but the message ? Input hex file is >> corrupt, check sum is not zero? >> >> I have the same issue attempting to load a Mac and Linux. >> >> Perhaps 2.05 is not available? Or is there a fix I am not aware of, or >> perhaps it is not necessary to upgrade? >> >> Thank you for your interest. Help would be appreciated. >> >> Best >> AD1G > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]

