Re: Knob for multiturn control

From: Bill Janssen (billj9_at_ieee.org)
Date: 01/09/05 

Date: Sun, 09 Jan 2005 16:42:09 GMT

Sam Goldwasser wrote:

>Ross Herbert <rherber1@bigpond.net.au> writes:
>
>
>
>>On 07 Jan 2005 09:31:00 -0500, Sam Goldwasser <sam@saul.cis.upenn.edu>
>>wrote:
>>
>>
>>
>>>"NSM" <nowrite@to.me> writes:
>>>
>>>
>>>
>>>>"Sam Goldwasser" <sam@saul.cis.upenn.edu> wrote in message
>>>>news:6wk6qqcd6d.fsf@saul.cis.upenn.edu...
>>>>| I have a spectrophotometer with a wavelength adjustment like this:
>>>>|
>>>>| http://repairfaq.cis.upenn.edu/Misc/multitrn.jpg
>>>>|
>>>>| but I'm missing the black (in this photo) knob. It must have been
>>>>accidently
>>>>| lost before I acquired the device - the knob is easily removed so the
>>>>| calibration can be adjusted.
>>>>|
>>>>| Does anyone have an extra knob kicking around or know where to obtain just
>>>>the
>>>>| knob?
>>>>
>>>>

I have one or two of those counter dials in my parts box. If you still
need it send Email

Bill K7NOM billj@ieee.org

>>>>Mouser.com amongst many others.
>>>>
>>>>
>>>Sorry if I missed where in their catalog it might be. They have the
>>>Vishey multiturn assemblies but I don't see knobs sold separately. This is not
>>>just some common knob for a 1/4" shaft. It snaps onto a large outer shaft
>>>that has set screws to permit the relationship of the dial and pot or
>>>whatever is being turned, to be calibrated.
>>>
>>>
>>>
>>Precisely what are the details of the shaft on which this knob must
>>fit? One would imagine that if this is not your standard
>>run-of-the-mill 1/4 inch shaft then this info is vital before anyone
>>can suggest a source. Unless everyone is familiar with the particular
>>potentiometer they don't know what the shaft looks like.
>>
>>
>
>It's probably unique to that multiturn dial, has nothing to do with the
>potentiomenter or whatever it drives. Likely only available from Vishay
>or whowever makes it for them.
>
>Thanks.
>
>--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
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