[Elecraft] KXPA100 160 ATU Issue

[Walter Underwood]

Might do a transmit power calibration on the KX3. Just make sure it is putting out the right power.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Dec 30, 2017, at 3:18 PM, Dick Dievendorff <dick at elecraft.com> wrote:
> 
> The ATU requires a certain amount of power so it can compare one SWR with another.  If there isn’t enough power, the ATU waits for it.
> 
> 73 de Dick, K6KR
> 
>> On Dec 30, 2017, at 14:47, Dave Sublette <k4to.dave at gmail.com> wrote:
>> 
>> I'm helping my son, K4TOO do some antenna work.  The antenna is up and
>> tunes on all bands with the KX3 on QRP.  When we put the amp in line, the
>> amp ATU tunes all bands, except 160.  When we hit the ATU tune button on
>> 160, there are no clicking sounds.  The SWR remains High and the power out
>> is low, I suppose because the SWR is high and the SWR protection is
>> shutting down the finals.
>> 
>> The Amp is a year old and has worked well until July.  It hasn't tuned 160
>> since then. What I am trying to say is I think it is a problem with the
>> amp, not the antenna.
>> 
>> I'm not sure how to proceed.  I'm away from all my tools, so I am somewhat
>> limited in troubleshooting options.
>> 
>> Anyone have any suggestions?  Thanks.
>> 
>> Dave, K4TO
>> ______________________________________________________________