[sdiy] Source for dual Concentric shaft pots?

[GRAHAM ATKINS]

Louis,

You will probably find the manufacturer will sell you a specific  
assembley
tool for the knob, I don't know of a "generic" tool.

Graham
On Oct 15, 2007, at 7:30, Louis van Dompselaar wrote:

> These work on the same principle:
> http://www.dompselaar.org/concentric.jpg (from a mixer I'm  
> currently scavenging for parts)
>
> As far as I can tell, they're also just two regular knobs with the  
> cap missing from
> the bottom one.
>
> As an aside, does anyone know what kind of tool to use on the  
> screws that are
> inside these knobs?
>
>> Rean collet knobs (like the ones I've used for my JH-720) are made  
>> to work with concentric pots: the collets of the bigger knobs have  
>> a hole for a smaller shaft to go thru. Then you don't need a cap  
>> for the knob: A smaller knob, which is mounted on the thinner  
>> shaft, sits where the cap of the bigger knob would have been. (I  
>> never built something with concentric pots, but I held two  
>> different sized of these knobs together, and it's amazing how it  
>> fits.)
>>
>> Here you see some larger Rean knobs without cap - easy to imagine  
>> how the samller ones would fit on top of them:
>> http://jhaible.heim.at/tonline_stuff/jh_720_in_progress_1.jpg
>>
>> I guess th esame thing works for "classic" collet knobs like Elma.
>>
>> JH.
>
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