After a good tune, I would use the KAT500 utility to examine and record the
selected component values.
When the failure occurs, before retuning I would look at them again and see if
they are the same.
Also after a good tune, I would run up and down the band to cycle the relays and
see if things are the same when returning to a previously tuned band segment.
On 2/4/2016 2:17 PM, Bill wrote:
For the past month I have been experiencing tuning problems with the KAT500.
The antenna in question is a simple 75 meter dipole fed with coax. You tune
the antenna at 3922, 2955 and 3975 - just for example. When you return to
those frequencies, a few hours later, the tuning is all off and the KPA500
demos its displeasure by beeping and flashing lights. Retuning will again hold
for a few hours, then all goes haywire again.
I have given shake test to the antenna/halyards - with an analog SWR bridge
in line - and see nothing to indicate breaks or damage. I replaced the feed
line and it still does everything the same. All coax lines inside have also
been changed out - to no avail.
I should mention that this problem exists on an alternate antenna also. The
alternate is also a dipole type. No remote baluns, nothing other than simple
center insulators. Chances are they are built properly - been doing it for
over 55 years and have never experienced anything like this.
I have reset the KAT500 to default a couple of times - reinstalled the
software - all the things you do with black boxes - went through the training
thing. I spoken with Elecraft and followed their instructions to the letter
also (which were the same as what I had been doing). It all holds well for a
few hours, then goes wacko.
If I have to push the buttons every time I QSY, there is little reason to
continuing using the KAT500. Of course that makes using the KPA500 more
difficult or impossible.
Shipping is expensive and so are service charges - the tuner is way out of
warranty.
Anyone have experiences such as these or suggestions?
I am seriously considering regressing to a manual tuner.
Thanks,
Bill W2BLC K-Line
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to w...@triconet.org
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
