I had access to a Kenwood TS 830 for a few days; thinking of buying it. It was fine except for an intermittent drifting (upward) of received freq--the digital freq. would show about 300 hz shift up. Also, intermitt. the FIX lamp illuminated and the freq. on dispkay was locked--tuning dial had no effect. Recycling the FIX switch would restore the orig. frequency it was tuned to. Is this a common problem with this model? I am basically a Boat Anchor man from way back and this new fangled stuff intimidates me.
I have owned a 830 for well over 20 years now. Take top of rig and make sure all the screws securing circuit boards are tight as this can cause the 300 hz jump you are seeing at times.
As far as the Fix button, rig has not been made for over 20 years and some dirt or oxidation can form on push button contacts. Not a big deal. Also sometimes output power can flux when band switch gets dirty. Cleaning it or cycling it several times will fix this.
The 830 is still a class act even today and clean one is a good investment.