Re: [AMMRL] No Na23 Tune dip on 500 MHz BBFO probe (Neo500)

From: PLscientific <pavel_at_plscientific.se>
Date: Tue, 15 Jul 2025 14:58:56 -0700

Hi Ken,

Just a small note – once I saw that  ATMM has saved the modified
parameters without being asked, thus, to be safe and keep 13C settings untouched,
I would recommend

1.        Go to the 13C dataset. Run ATMM, ensure you see
a dip, and write down the numbers for rough tuning and matching switches at
the ATMM panel (like “695” and “97”)  as
well as the slider positions for T/M
2.        Create 23Na dataset. Run ATMM, put the same rough
values (695, 97) and sliders, expand the Wobb range to see the dip at 125 MHz,
and move sliders to get 132 MHz and (or) rough values to the higher numbers if
132 MHz is unreachable.

Keep in mind that the atma system for those probe types may start to misbehave
upon aging (I have more than 20 probes in my portfolio), which could be another
explanation for the no dip issue.

Regards,

Dr  Pavel Iouchmanov

P&L Scientific AB

Repair/customization of NMR probes and spectrometers

Electrophoretic NMR and custom NMR solution for electrochemistry

+46 736 220 672
Applied Physical Chemistry,KTH
Teknikringen 36,
100 44 Stockholm
Sweden
pavel_at_plscientific.se ( pavel_at_plscientific.se )
http://www.plscientific.se


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Received on Tue Jul 15 2025 - 17:56:18 MST

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