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6400M into a KAT500 tuner
Have the 6400M hooked to KAT500. Everything used to work very well. Whenever I changed bands, or even changed freq within a band the KAT500 loaded a saved memory and swr was low. Now it will not auto tune even on a band change. Soon as I change bands and xmit the tuner goes into fault mode until I hit the tune button on the Flex and the tune button on the tuner then it tunes. And yes the 6400M internal tuner is bypassed.
Using 25 watts tune power per Elecraft instructions and the amp wattmeter shows 25 watts output, so I know the tuner works. It just will not do it automagically any more.
Have the usb cables from Elecraft and the usb cables are enabled and configured properly in the 6400M. It just seems as tho no band/freq data is getting to the tuner. When I change bands and then hit the key the tuner tunes correctly. But if I do not use the key or the tune buttons then no tuning.
Checked all the config settings in the tuner and they seem to be correct based on a saved prior config that was working properly.
Is there something else I need to turn on within the radio other than enabling the usb cables?
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