"Sam Goldwasser" wrote in message
...
| 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?

Mouser.com amongst many others.

N