Re: string vibrators needed

["Paul Camp" <pjcamp@coastal.edu>]

I have been using the Pasco wigglers for 3 years now. They are 
essentially a long throw speaker with a piston attached. You drive 
them using a function generator and amplifier (I use a cheap amp from 
Radio Shack and some handmade cables). It works wonderfully well and 
since you can vary the frequency, you have the possibility of a large 
number of additional experments that you couldn't do with the old 
tuning fork jobs. The only caveat I would mention is that the string 
that comes with the device stretches like crazy -- most of the time 
you would want to substitute something like braided nylon.


> Hello friends,
> I have a few old but wonderful Sargent Welch string vibratirs for a wave
> lab. They vibrated at only one frequency (120) but we could change the
> tension in the string and produce different standing waves.
>  I need more of them but SW no longer carries them as the manufacturer has
> quit business.  Does anyone have a good model they could recommend?
> Thank you for your help.

 
Paul J. Camp                   "The Beauty of the Universe
Assistant Professor of Physics  consists not only of unity
Coastal Carolina University     in variety but also of 
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