[Elecraft] KX3 not switching ant when changing bands

[richard gilley]

Hi,
	Following F. Cady advice on grounding the station equipment to a common bus, I did so.  My set up includes a KXPA100 with the ATU, the KX3 and PX3. Now I noticed that the KX3 does not always indicate the same antenna as the KXPA100 when I switch bands.  Sometime it does and then does not, or will change after 5 to 10 seconds.   I have a Vertical for 30 meters, and a Dipole for 40 and 20 meters, the KXPA100 switches immediately.

I have powered down all the equipment, restarted and sometime this does the trick and all is well.  But sometime it does not.  If I remove the ground from the KX3 and the PX3 the issue goes away. 
The equipment ground is #18 stranded, < 10” to the bus, the bus has a copper braid to the KXPA100, the antenna grounds and on to the station ground rod 8’ feet outside the shack.

At the moment all is OK.  I just do not know the root cause.  Any ideas or thoughts.

R Gilley
AD1G