Hi
We have a 400MHz Bruker room-temp BBFO probe which has stopped tuning on the
1H channel. ATMA can’t find a dip, and I don’t see a change in
the profile upon adjusting the tune manually using atmm (let alone a dip). The
probe tunes and matches fine on the X-channel, and adjusting the match on the
1H channel changes the profile I’m detecting (although still, no dip).
This is true for several samples of different solvents (CDCl3, DMSO, D2O).
X-channel is tuned to 13C, so it’s not a problem of 19F detuning the
1H channel.
A backup probe tunes and matches just fine, so the problem is clearly the
1H tuning.
I have two questions:
1. Is there anything we can do that might *easily* fix this in-house? It
seems like either the tune rod is jammed somehow and won’t twist
(which we might be able to easily fix) or that the screws have been stripped
(more difficult repair and probably not worth attempting).
2. Does anyone have third party vendors they would recommend for probe
repairs? We are in the Philadelphia area, if that matters.
Thank you guys for any advice!
Beth Moscato
Temple University
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Received on Fri Sep 27 2024 - 14:42:11 MST