[sdiy] Inexpensive Rolandesque spline knobs from Thailand

[Stewart Pye]

Hi Robin,

Have you tried the 16mm BI Tech ones? I have some here but haven't used 
them yet. Hopefully they don't suffer from the slop that you mentioned.

http://au.mouser.com/Search/Refine.aspx?Keyword=P160KN-0QC

Regards,
Stewart.

On 8/7/2012 7:55 PM, Robin Whittle wrote:
> Hi Tom,
>
> I am interested in the black ones, but the grey ones would no doubt be
> of interest to other folks:
>
>> I think Robin is referring to these ones:
>> http://www.ebay.com/itm/10-x-Knob-Grey-Blue-Mark-Potentiometer-Pot-HJ106-THAISHOPETC-/140799464473
> or http://www.ebay.com/itm/140799464473
>
>> (several colours available)
>>
>> Personally, quite excited to see these -> compact spline shaft knobs
>> give me good ideas (drum voices etc - more compact than my regular
>> panels but without the hassle of set-screw knobs like the davies ones)
>>
>> So - thanks for the pointer Robin!
> There are some smallish Sifam spline knobs at:
>
>    http://www.rapidonline.com/Tools-Equipment/Fasteners-Fixings/Knob-Fixings
>
> such as the 11mm soft touch Sifam 3/03/TPN110 006 range:
>
>
> http://www.rapidonline.com/Tools-Equipment/Sifam-11mm-Soft-Touch-Mixer-Style-Control-Knobs-502503
>
> I have some here like this, without the nut cover.  I got them from RS
> Components:
>
>    http://australia.rs-online.com/web/p/potentiometer-knobs/2994884/
>
> These are the shape of the front four in the illustration.  They look
> and feel OK, but I found them very difficult to get onto the spline
> shaft of some Tiawan Alpha pots I got from Jaycar here in Australia,
> such as:
>
>    http://www.jaycar.com.au/productView.asp?ID=RP8504&form=CAT2&SUBCATID=968
>
> I found it even more difficult to get the knob off the shaft.  Some
> leverage was required, which distorted the knob and perhaps lead to
> damage of the splines.  There's no such trouble with the Thai/Chinese
> pots - they go on and off well.
>
> The Sifam knobs are still unreasonably tight on the BI Technology pots,
> despite them having a longer shaft with a much longer split.
>
> So I think the tightness is due to the knobs themselves, not any
> particular pots I am trying them on.
>
> BTW, I think these small Tiawan Alpha pots are not good for anything
> involving precision control, such as pitch.  They have some internal
> slop between the shaft and the rotor.  There are some similar pots from
> BI Technologies at Mouser, but not with the range of values which Jaycar
> carry:
>
>    http://au.mouser.com/Search/Refine.aspx?Keyword=P092N
>
> The BI pots have no such slop.
>
> The Thai/Chinese knobs are a rather loose fit on the BI Technology pots,
> but that should be easy to fix with some kind of glue-like material.
>
>
>    Cheers
>
>     - Robin
>
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