[Elecraft] Split knob question

[WILLIS COOKE]

I have the tools and I have checked.  The threads are not the problem.  I have epoxied knobs back together and they work fine, but glueing them together for the check will tell you nothing because they always break at the tapped hole.  I am hopeful that the new knobs have cured the problem, but it will take a year or more to tell.  The way to check a new knob is to run the screw in and out in the hole.  Run it in until it is visible in the hole, but not so far as to hit the opposite side.  If you run into significant resistance without the screw protruding into the hole you may have a problem.  I did not when I made the test, but I have lost three sets of knobs due to breakage.
 Willis 'Cookie' Cooke 
K5EWJ 




________________________________
From: Mike <nf4l at nf4l.com>
To: john at ae5x.com
Cc: elecraft at mailman.qth.net
Sent: Sun, May 9, 2010 3:47:02 PM
Subject: Re: [Elecraft] Split knob question

I like the taper tapped threads theory. It would be a nice experiment 
for someone with a set of taps to check a knob. I wonder if one of the 
split ones could be super-glued together to check.
Who's got the tools?

73, Mike NF4L

John Harper wrote:
> No, it isn't.
>
> My recent K3 (#4xxx) had two knobs (AF/RF gain) split as described - after
> normal use some time after installation. This was in April. An email to
> Elecraft produced two new knobs, one of which has since cracked despite my
> extremely careful and gentle installation of them.
>
> John Harper AE5X
>
>
>
>  
>> Hi Cookie, others
>>
>> Time will
>> tell if the "new" version of the knobs prove satisfactory.
>>
>> 73! Ken Kopp - K0PP
>>    
>
>
>
>
>
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