[Johnson] Johnson KW Matchbox

[Charles Ring]

My KW Matchbox, which was new in 1969 (HS graduation present from my 
parents) has never had that problem as far as I can remember. I have 
removed and reattached the knobs several times to remove the cover.

73 de W3NU



Jim wrote:
> 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
>>>
>>>       
>> _