Re: [AMMRL] tuning range shifts on BBFO probe

From: PLscientific <pavel_at_plscientific.se>
Date: Wed, 02 Aug 2023 09:01:08 -0700

I agree that looking at the probe insert is always a good idea. However, since
this is BBO type of probe, the proton is in the outer coil so it is much less
sensitive to anything (even for the SmartProbe generation that has a superior
sensitivity). Indeed, if one of the Faraday rings is misplaced for whichever
reason the tuning will be destroyed. Also, as  David said, all this can
be indirectly tested by the shimming test - insert the BRUKER standard lineshape
sample and see if the probe is close to specification after Topshim
(<0.5 Hz at 50% with < 6/12 Hz hump at 0.55 % and 0.11 % respectively)-
humpcal script. Indeed, the Topshim may not work well for other reasons, but
this is the simplest way to test.

For the illustration,  you may look on my website which has a collection
of photos of the various probe repairs.

Dr. Pavel Yushmanov,

+46736220672
P&L Scientific Instrument Services
Applied Physical Chemistry, KTH
Teknikringen 36,
100 44 Stockholm
Sweden
pavel_at_plscientific.se
http://www.plscientific.se


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Received on Wed Aug 02 2023 - 09:01:12 MST

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