[R-390] Ramblings on Calibration

[Jerry K]

On the contrary, that's a very cool application, Gord. Nice to know guys
like you are working on stuff to replace this damned Coumadin (which is a
brand name of Warfarin, which is actually common old rat poison) that I have
to take every day. Thanks!
Jerry W5KP


-----Original Message-----
From: r-390-bounces at mailman.qth.net
[mailto:r-390-bounces at mailman.qth.net]On Behalf Of Gord Hayward
Sent: Friday, April 08, 2005 7:17 AM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] Ramblings on Calibration


High level calibration for the 390a is certainly worth while.  Last week
I was debugging a crystal
oscillator and used the 390a as the monitor.  It was as stable as my
crystal for several hours and
the frequency was dead on.  The problem with the crystal was mode
hopping as the water on the
gold electrode surface evaporated.  I know this sounds strange, but I
use the crystals as bio-
sensors.  This series of oscillators is to measure blood clot busting
drugs such as t-PA by growing
a clot on the crystal and watching the frequency shift and series
resistance change as the drug eats
the clot.

--

Gordon L. Hayward, Ph.D., P.Eng.,
Associate Professor, Biological Engineering,
School of Engineering, University of Guelph,
Guelph, Ontaro, N1G 2W1.


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