Main VFO knob wobble

[ab2tc]

Hello,

My main VFO knob is starting to develop a slight wobble. There is no radial play, but a slight axial play and I can rock the knob on the shaft. I am hoping that it is just the screws coming lose and not the encoder bearing going bad. Am I justified in this optimism? It isn't noticeable yet when I use my forefinger on the outside of the knob, which is my usual way on the K3.

Knut - AB2TC

[ab2tc]

My radio is a K3.

ab2tc wrote

Hello,

My main VFO knob is starting to develop a slight wobble. There is no radial play, but a slight axial play and I can rock the knob on the shaft. I am hoping that it is just the screws coming lose and not the encoder bearing going bad. Am I justified in this optimism? It isn't noticeable yet when I use my forefinger on the outside of the knob, which is my usual way on the K3.

Knut - AB2TC

[AC7AC]

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[ab2tc]

Ron D'Eau Claire wrote

It's easy to see if it's the set screws. That rubber "tire" around the knob
just slips off. You may have to work your fingernails under the edge closest
to the front panel while pressing on the knob with your thumb(s) but it just
slides off of the knob.

Then you'll see the holes for the hex wrench to tighten the set screws.

Ron AC7AC

<snip>

That boot doesn't come off very easily which is the reason for my inquiry. I don't want to possibly aggravate a bearing problem unless I know that the likely reason for the wobble is lose set screws.

[AC7AC]

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[Mark M W2OR]

There was a similar post here about four weeks ago, and the issue then was the rubber grip sleeve, over the knob, that had some rubber burr protrusions on the inside of it that caused a slight bump on the outside, and when turned, made it seem as if it was the whole knob wobbling. Simple to fix, and hope that's the cause, in your case.  //Mark w2or.

ab2tc wrote

Hello,

My main VFO knob is starting to develop a slight wobble. There is no radial play, but a slight axial play and I can rock the knob on the shaft. I am hoping that it is just the screws coming lose and not the encoder bearing going bad. Am I justified in this optimism? It isn't noticeable yet when I use my forefinger on the outside of the knob, which is my usual way on the K3.

Knut - AB2TC