Hello Spinlandians,
I have a weird issue that I've been observing for years.
On my Varian MR400 of several P31 experiments are run in close sequence,
the tuning of all X band nuclei begins to fail. In fact it also begins to
affect the tuning of the proton channel to a lesser degree. It also
obviously impacts the sensitivity of those experiments drastically .My
suspicion is that the low band amplifier begins to overheat.
Our solution has been to not allow P31 on this instrument as C13 doesn't
cause this problem. For various reasons, I would like to figure this out so
that P31 is again available.
I'm doing some troubleshooting, but I think it begins to recover after
being off for a while. It might also be the synthesizer.
What is weird is that this consistently happens after running a series of
P31 experiments.
Any thoughts on this?
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Received on Thu Sep 14 2023 - 06:56:51 MST