Hi, Shawn,
Sorry, I don’t quite understand your last post:
- with a standard H-F{X}
OneNMR it is completely impossible to do any H/F experiments. You need either of these probes:
ASW, ATB, AutoX-HFX or Omni (HFX-OneNMR - only a very small handful of these were made before
Agilent kicked the bucket).
- in a single-highband console like 400MR you don’t need a splitter/combiner to run
H/F experiments - this is only required in true dual-highband VNMRS consoles (e.g. hi-lo-hi-lo).
Single-highband consoles never produce fully overlapping H/F pulses or decoupling - specifically
decoupling switches back and forth between e.g. 1H observe and 19F decoupling, so the receiver never
experiences any pulses, hencd no filtering required (but also less S/N and more artifacts from
chopped acquisition). True dual-highband consoles actually have decoupling on during the entire FID,
thus requiring full filtering of the receiver channel from decoupling.
Cheers
Bert
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Am 23.07.2025 um 23:06 schrieb Shawn Wagner via groups.io :
Thanks Bert, David and Baa for the suggestions. I have a 400MR, but it is currently
fit with a OneProbe that is not dual tuned for 1H-19F. I will likely tie the
Channel 1 and 2 (on the VNMRS) together with a combiner/splitter. This seems to be
the lowest energy solution since it requires just a small hardware change. It's
not a core magnet so I don't want to make too many changes. They will be happy
if it works since they do a lot of fluorine chemistry.