In message
<[email protected]>,
dated Thu, 2 Feb 2012, Bob Richards <[email protected]> writes:
That is a sweet setup. I can only dream of having a probe positioner.
I've tried selling the idea that we can get one and share it among the
labs in our company, but getting them to spend that kind of money is
like pulling teeth.
I made one for measuring loudspeakers at audio frequency out of an
antenna rotator. Mostly, I could just have one mic on the boom and
measure at points on a circle. But for measuring points on a square grid
you need two mics, one at the end and one at 70.71% distance.
Of course, I only had to worry about diffraction by the boom and
rotator; for EMC you need to minimise the metal content. Not easy to
make a non-metallic motor, but maybe a very small one with high-ratio
gears would be OK. Or an air or hydraulic motor could be all-plastic.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
Some people who are peeling the finch of the financial crisis are thinking of
biting a rook.
-
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