[Johnson] Johnson KW Matchbox

[Jim]

File a small flat area on one side of the shaft.....

Jim

> Get some Lock-Tite and put a drop on the set screw.  Just don't get the 
> kind that is intended for screws that are not to be removed.
> 
> David
> KC2JD/4
> 
> Steve wrote:
>> I have two of the Johnson KW Matchboxes.
>> 
>> The TUNING knob on one and the MATCHING knob on the other were loose on 
>> their shafts recently and I tightened the knobs' set screws.
>> 
>> I haven't kept any notes, but the knobs seems to loosen on the shafts 
>> often enough that it's an annoyance. I don't recall if it is the same 
>> knobs that keep loosening on their shafts.
>> 
>> I guess that with use and over time, the set screw backs out a little, 
>> thus allowing the knob to freely turn on the shaft.
>> 
>> Is there a method to tighten the set screw and expect it to stay tight?
>> 
>> Thanks.
>> 
>> Steve K8JQ
>> 
> 
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