[Boatanchors] Removing knob with steel set screw

[Carl]

And pour a bit of Kroil, PB Blaster or 3in1 oil into the set screw hole

Carl
KM1H


----- Original Message ----- 
From: "Al Parker" <anchor at ec.rr.com>
To: "Ian Wilson" <ianmwilson73 at gmail.com>; "Boatanchors" 
<boatanchors at mailman.qth.net>
Sent: Saturday, August 15, 2009 7:33 PM
Subject: Re: [Boatanchors] Removing knob with steel set screw


> Hi Ian,
>    Another possibility -- since the setscrew has scored the shaft, take a
> longer setscrew and grind the end to a flat, removing the cupped portion.
> You'll have to do this with a cup of water and quench the screw regularly
> during the grinding to keep it's temper.  Then insert the new flattened
> screw in the knob fairly tightly and try to burnish the scored edges down,
> by turning the knob and holding the shaft, or against a stop if that's
> possible.  Work the knob, with flattened screw, along the length of the
> shaft in the proper area as you turn it.
>    Good luck, it does work.
> 73,
> Al, W8UT
> New Bern, NC
> www.boatanchors.org
> www.hammarlund.info
>
> "there is nothing -absolutely nothing- half as much worth doing as simply
> messing about in boats."
>   Ratty, to Mole
>
>
>
> ----- Original Message ----- 
> From: "Ian Wilson" <ianmwilson73 at gmail.com>
> To: "Boatanchors" <boatanchors at mailman.qth.net>
> Sent: Saturday, August 15, 2009 5:05 PM
> Subject: [Boatanchors] Removing knob with steel set screw
>
>
>>I have a Johnson Viking 122 VFO. The band change knob will turn freely on
>>the
>> shaft if I loosen the set screw, but it won't pull off the shaft.
>>
>> The VFO is mounted in an ugly chassis/PSU that I would like to free it
>> from.
>>
>> I can't see enough of the shaft to grab hold of it, so any pulling force
>> will be
>> applied to the switch, probably with disastrous effects.
>>
>> Is there anything I can do other than cut the knob off the shaft?
>>
>> 73, ian K3IMW
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