[time-nuts] Magnetic Resonance Spectrometer - redux

Bob Stewart bob at evoria.net
Sun Jul 6 23:51:18 EDT 2014

Thanks Brooke.  I'll look into it.  It would be interesting to try to develop a frequency standard from a test tube of water.  


 From: Brooke Clarke <brooke at pacific.net>
To: Bob Stewart <bob at evoria.net>; Discussion of precise time and frequency measurement <time-nuts at febo.com> 
Sent: Sunday, July 6, 2014 12:20 AM
Subject: Re: [time-nuts] Magnetic Resonance Spectrometer - redux

Hi Bob:

This is very similar to a "proton precession magnetometer" that measures the total magnetic field, not in vector components.
There's a lot of amateur designs for these that you could use as the bases for a MRS.

There is an article in the same publication for a tube type frequency standard that can be used to drive a line powered 
wall clock.
The Magnatron magnets were probably Alinco, so if you upgraded to modern magnets it might be much more stable.

Have Fun,

Brooke Clarke

Bob Stewart wrote:
> First, an apology.  When I changed the topic on my original post, I thought that would be OK.  Apparently that's still a thread-jacking.  Sorry.
> I'm still interested in this Magnetic Resonance Spectrometer thing, though.  On page 335 of the pdf linked below by Dave, there's an experiment with an MRS using water and the magnet from a magnetron available back then.  Apparently the resonant frequency of hydrogen nuclei in water is 6.131325 MHz in that magnetic field. Did anyone ever pursue this with the idea of creating a frequency standard, or was the technology just too primitive at the time?  Perhaps it's a repeatability problem from the magnetic flux standpoint?  I can guess that temperature changes would cause enough of a flux strength change to cause a problem, but that's just a guess.
> Bob - AE6RV
> ________________________________
> From: DaveH <info at blackmountainforge.com>
> To: 'Discussion of precise time and frequency measurement' <time-nuts at febo.com>
> Sent: Saturday, June 28, 2014 1:09 PM
> Subject: Re: [time-nuts] Loran, GPS, Lightning, Timing
> A PDF of the 1960 book can be found here:
> http://www.sciencemadness.org/library/books/projects_for_the_amateur_scientist.pdf
> Dave
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