[Elecraft] K2/100 CAL acting up?

[TI2/NA7U]

My KAT2/100 seems to be acting up. Started noticing high SWR problems with a
tuned antenna, so ran further tests with a dummy load.

First thing is when I set Menu->AtU-CAL, I get high SWR readings. I thought
this was supposed to zero out/bypass the tuner. Clicking of relays is heard
but with a dummy load the SWR reading is 4:1 on the LED scale. It's also
pulling down the voltage as I clearly hear my outboard fan reduce RPM.

If I set it back to Auto, the high SWR remains until I hit TUNE, which
quickly takes it down to 1:1 (or something reasonable when using an antenna)
Sometimes, if the rig is in high power range I see a momentary HiCur flash
at first key down. My current level is set to 3.5A.

I have ample output power according to my wattmeter and have been making
QSOs, as I can tune out the phantom SWR, but probably I am making the
situation worse. Sometimes when I switch bands, the high SWR returns even
though the ATU memory should remember the band.

Can someone outline a diagnostic path to figure out where the problem may
lie? Fortunately, the KAT2/100 is outboard, which makes it easier to access
(K-Twins configuration).

TIA es 73,

Casey, TI2/NA7U













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