[Elecraft] KPA-1500 ATU not working well

[rlvz at aol.com]

I'm wondering if anyone else is having problems with their KPA-1500 ATU on 6-meters?  My antenna is cut for 50.100 and has a 2.2:1 SWR at the 50.313 FT-8 frequency.  The very best the ATU will do is to lower the SWR from 2.2:1 down to 2.0:1 which is almost no improvement.  The 2.0 to 1 is with exciter power, when I switch the KPA-1500 to operate and transmit at 1,200 watts the SWR increases to aprx. 2.2 to 1 and the KPA-1500 will fault and trip off occassionally.  Hoping there's a fix for this.
 
I'm using the latest KPA-1500 firmware.
 
Thanks, 
Dick- K9OM