K3 erratic VFO

[Chris Meagher-4]

I'm getting erratic behaviour of the VFO. it will suddenly jump to
frequencies outside of ham bands
e.g. 200MHz, or will lurch back and forth in a band. It is triggered when
turning the main knob
or also RIT/XIT knob configured as fast tune. When powered off and back on,
seems to always return to 28.xxx MHz.

I have tried re-do firmware, re-init, recal VCO, and still it persists. CAL
VFO fixed it for a day or 2 but now its back.

Elecraft support suggested remove front panel and deoxit the pins.
Before I go to this far, I wonder if anyone has`a similar experience or
suggestions.
Radio is presently unusable, after many years of trouble free operation..
(Serial no 685)

Chris  VK2ACD
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[graham.wood1]

Hi Chris,

A few months ago I updated the K3 (sn5845) firmware from 5.29 to 5.38.

I started to have a similar experiences, VFO's jumping Freq etc. I was given similar advise, to try working backwards removing newly installed boards and reinstalling them.

Before trying this I decided to go back to firmware 5.29 and last known working config file. This completely cured the problem and K3 is still working fine, so far not plucked up courage to try updating to 5.38 again.

If your problem started after updating your firmware, try going back to previous version it might solve the problem.
best of luck Chris.

73's Gray G3VIP
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