Thanks Tom for your feedback. I did conduct the test and down to 2 watts the
KAT500 still searched for a tune.As I indicated when connected direct the K3
ATU finds a reasonable match at the any power level from 2 to 100
watts.Regardless, it still points to the antenna as the problem. Will check it
out further.Thanks,Bill - W0BBI
From: Bill Wiehe <[email protected]>
To: Elecraft Reflector <[email protected]>
Sent: Sunday, October 30, 2016 2:20 PM
Subject: KAT500 - Tuning Anomoly
Up until last week, my KAT500 has run lawlessly. However, it now has a problem
tuning my 160M dipole for no obvious reason. Symptoms are continuous searching
for a match. If it finds a match in tune mode, as soon as you hit the key, it
begins tuning again in "Auto" mode or faults in "MAN" mode, regardless of power
level. What is interesting is that the KAT500 will tune my OCF Windom on 160M
with no problem. Initially assuming it was the antenna at fault, I did the
follow checks.
- Checked the 160M dipole with an Antenna Analyzer and both it and the coax
check out fine. Even where the analyzer suggests a 1:1 match, the KAT500
tries to retune. - Switched input ports on the back of the KAT500. No change.
- Used the K3 ATU (with KAT500 in bypass mode and with the dipole directly
connected to the K3) and it matches the 160M dipole antenna with no trouble.
- Erased all the previous 160M tune memories, no change.- Reset factory
defaults, no change.- Reloaded the firmware from the website, no change.
I would appreciate insight one my have.Thanks & 73 Bill - W0BBI
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