[R-390] R-390A KC knob bind

[Stan Gammons]

What paint are you using to paint the knobs?


73

Stan
KM4HQE


On 8/7/2019 8:00 PM, Larry H wrote:
> I mentioned in my last post that the KC knob in the 390A I'm working on had
> a bind in it.  I thought I checked the VFO when I first got it, but I guess
> not close enough - that's where the bind was at.  And it was not on the
> inside, it was the Oldham coupler clamp (which was not tight).  Somehow the
> coupling had gotten pushed onto the shaft too far and it was rubbing on the
> mounting frame every rotation.  While I had it out, I checked the tube,
> components and lubed the inside points.  It works like new, now.  The nut
> on the end of the core is just right tight on the shaft, so there is no end
> play there or on the shaft bearing.  I have not done measurements on it,
> but should be a very good unit.  Now the KC knob turns smoothly and is even
> a little easier to turn after the maintenance.
>
> Back to the knobs.  Got to get some more paint - Lowe's was out today.
>
> Regards, Larry
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