[Elecraft] [KAT500] Odd KAT500 Behavior

[Jack Brindle]

It seems that the KAT may not be getting fresh band info - if it did you would be hearing relays being set before the K3 transmitted. The KPA500 is listening to the same Band signals as the KAT (but not the Auxbus data), so I would turn on the KPA500, leave it in standby, and watch the display and listen to its relays to see if it changes bands when the K3 does.

I think the key here is to determine exactly what the WSPR code is sending the K3. Is it also sending data to the KAT500? If so that stream would also be telling. If the computer is commanding the K3 to go into transmit before all the commands have been received it could cause a situation just like you describe. It might be up to the software author to fix this situation.

73!
Jack, W6FB




> On Dec 13, 2018, at 6:19 AM, eric norris via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> I am using an early KAT500 with a K3S.  When using WSPR in band-hopping mode at 5w, WSJT-X 2.0 commands a band change and transmit, the K3S starts transmitting, then stops, changes bands, then changes back to the original band, say 40 meters.  I think this part is a WSJT problem, and has been reported.  Now the K3 is on 40m.  If I press the TUNE button in WSPR, the SWR meter shows a high SWR and relays click in the KAT500.  If I press TUNE again, the swr is good.
> The KAT500 is configured to follow the K3 vfo, so why is the KAT500 retuning?  If the K3 shows 40m, why wouldn't the KAT500 have the proper tuning solution?  It is properly cabled with auxbus cables between the K3, KAT500, and KPA500 in that order (the KPA500 is off).  The KAT3 is in bypass mode.  I don't think this is an rf problem because I regularly use the KPA500 with no signs of rf  getting into anything. This seems very odd.  All firmware is current.  Any ideas?
> 73 Eric WD6DBM
> 
> Sent from Yahoo Mail on Android
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to jackbrindle at me.com