[sdiy] Inexpensive Rolandesque spline knobs from Thailand
stewpye at optusnet.com.au
Wed Aug 8 22:36:32 CEST 2012
I just realised you were talking about slop in the 9mm Alpha's, so maybe
the 16mm Alphas are OK...
On 8/8/2012 7:03 AM, Stewart Pye wrote:
> 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
> 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:
>> 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:
>> such as the 11mm soft touch Sifam 3/03/TPN110 006 range:
>> I have some here like this, without the nut cover. I got them from RS
>> 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:
>> 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
>> 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.
>> - Robin
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