Andy,
There have been improvements in the firmware to address exactly that
re-tuning problem. It has to do with the measurement of SWR - during
SSB, if the reflected power is sampled at a voice peak and the forward
power is sampled during a period of low RF, the resulting calculation
will think the SWR is high and re-tune. There have been changes made to
the firmware to attempt to smooth that measurement over a longer period
of time.
If you are not using the latest firmware, give it a try.
After 'training' the tuner, you may want to run it in Manual mode rather
than letting it auto-tune 'on the fly'.
73,
Don W3FPR
On 5/20/2014 8:44 AM, ANDY NEHAN wrote:
I am having some problems with my understanding of the KAT500.
I have a K3 and an ACOM1000 linear. On 40m when I operate data modes or AM
(purely for testing purposes) all is well the units work well together. I can
happily run up to 400 watts and as is well. My 40m OCFD has an SWR of about
1.2:1.
But when I operate SSB things go "odd". For no apparent reason the KAT500
starts to retune part way through and over and enters a fault condition (on the same
frequency as I was using for data - so there is no frequency change involved) and the
Auto button flashes. Now I have looked in the manual and cant find the meaning of the
flashing Auto LED.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
