Hi Ken,
If the problem is coming from the x-band amplifier, should it affect the C-13 as well?
Just my 2 cents. Good luck.
Simon
> From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> On Behalf Of Kenneth Sharp-Knott via groups.io
> Sent: Thursday, September 14, 2023 8:56 AM
> To: ammrl_at_groups.io
> Subject: [AMMRL] P31 issues on Varian ,MR400
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 - 07:04:02 MST