[Elecraft] K1 KAT1 ATU is ending w/P L O

[ok1rp]

Hi all,

I am sorry to bother you over here...

My daddy Jul, OK1SP is using intensively K1 these days (until his K2 light
repairing will be finished by myself) and he reported to me last week that
his K1 is showing P L O after KAT1 tunning sequence on some bands.

I found this info in manual "If you see P L O on the display during any mode
that should display SWR, you probably have power set too low to obtain a
stable SWR reading. Power is automatically reduced to 1.5 watts in all
SWR-reading modes, so there’s usually no need to set power below this level
manually, unless you’re operating “QRPp” (very low power). In this case, set
the power to about 1 to 2 watts for tune-up purposes, then decrease it for
operation."

The problem is that power is set to 5-7W all the time. It appears just time
to time even although there is no change in antennas setup, feed line etc.
The antenna is 18m random wire at 15m height, as good as possible grounding
using copper strip house/earth ground, 9:1 balun is used. The feed line is
around 1m of good soldered coaxial cable w/BNCs. It is appeared after much
longer tunning sequence than normal...

I will be happy for ideas.

73 - Petr, OK1RP
K3 #778
K2 #4800




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