We have beta firmware for the KXPA100, now revision 1.28, that causes the 
KXPA100 to be much more tolerant of SWR and reflected power encountered while 
tuning an external tuner.  As others have suggested, set TUN PWR to a low value 
between 5 and 20 watts depending on the needs of your tuner, but normal Tx 
power can be  left at 100 watts.  The KXPA100 won't tolerate without faulting 
really high reflected power (above 50 watts) or long duration reflected power 
above 20 watts or so.

See the KXPA100 firmware page on our website.

73 de Dick, K6KR

> On Apr 9, 2014, at 1:50, Luc Favre <[email protected]> wrote:
> 
> Hello,
> 
> My configuration : KX3, KXPA100 (with KXAT100, not used in normal operation), 
> coax line, SG230 (Smartuner), doublet.
> 
> My question :
> In way to tune the Smarttuner, I must send some RF into the Smartuner via the 
> coax line. Before the tuning process begins, the SWR in the coax line to the 
> Smartuner may be very high. In this case, the KXPA100 goes into Fault 
> Condition ("Err Ant") ; no RF more, the tuning process stops.
> 
> Roundabouts :
> 1. PA off (via menu), tuning with KX3 barefoot.
> 2. KXAT100 on, KXAT100 tuning, Smartuner tuning, KXAT100 off.
> 
> Doing so (1. or 2 above), I can get the Smartuner tuned, but it's a bit 
> cumbersome.
> 
> Any idea ?
> 
> 73
> Luc/F6HJO/HB9ABB
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