Knob Frozen on Capacitor Shaft

Brian Carling bcarling at CFL.RR.COM
Mon Mar 26 18:08:44 EST 2001

First make sure there are not TWO set screws(!)

I'm sure you already did that, didn't you? I have been folled before!

I don't know what that other product is that you used. I would start off with some
"penetrating oil."

If you still can't get it loose, I would then see if you can get some vice grips on the
SHAFT that will hold it firmly so it can't slip and THEN try turning the knob.

If you still can't move it, you could TRY this
(Your on your own though, and I accept no blame if you bugger up the knob!)

Take a SECOND set of vice grips and a rubber sheet like y use to turn difficult jars in a
kitchen. Put the rubber on the inside of the jaws so you don't scratch up the knob is it
slips. Turn the vice grips onto the knob but only moderately tightly, using the rubber on
the inside of the jaws. Rock the rotation left and right very very gentl;y and you may
see it get freed up.

You don't think the last owner WELDED it on there do you?


On 26 Mar 2001, at 17:00, Ron Evans wrote:

> Well, you must know I'm desperate or I wouldn't expose my abundant
> ignorance so blatantly for all of hamdom to see!
> I'm removing the front panel of my Johnson Adventurer and was making
> great headway until the last knob (AMPLIFIER TUNING).  It's held to the
> shaft exactly as all the other knobs are, as far as I can tell.  Each
> knob has a small slot setscrew which threads into a brass insert in the
> knob and then presses against the control shaft.
> I removed the setscrew completely with very little trouble.  (Didn't
> mean to; just kept on unscrewing too long!)  So then I assumed the knob
> would come off as easily as the others.
> I've used WD-40 and Hoppe's Lubricating Oil in the setscrew hole, let it
> set for 30 minutes at a time, have tapped on the knob with a rubber
> handled screwdriver until I'm exhausted, but the knob remains frozen to
> the shaft.
> Is this just one of those "you gotta wait 24 hours" situations, or is
> there some way I can get this knob off...short of a hacksaw, that is!
> The knob is just like all the others, but it's just not going anywhere.
> I've applied quite a bit of force to it but it doesn't budge.
> Any ideas?  I'm just going to set it aside until you, my saviors (!),
> rescue me once more!  I guess this is all part of my learning curve, but
> it's darn frustrating.  Grrrrrr. *grin*
> 73,
> Ron - K5MVR

More information about the Boatanchors mailing list