Hi Kenneth,
If you are talking about the pulse amplifiers located in the power
supply module of the MR400s, yes, they are unreliable. We have had to
change the low band amps in both our MR400s. But the rate that they
failed on you is rather high. Maybe they are overheating due to a bad fan?
Greetings
Eugenio
Eugenio Alvarado, Ph.D.
Co-Director, NMR Lab. Room 3500
Chemistry Department, University of Michigan
930 N. University Ave., Ann Arbor, MI 48109-1055.
Voice: (734)-764-9924
On 08/07/2015 03:13 PM, Kenneth Knott wrote:
> Turns out the 1H frequency died on the synthesizer board. Very
> Frustrating as this is the 3rd time in 4 years we'll be replacing this
> board. Always one channel or the other - never both.
>
> I'd be curious to hear others experiences with these boards on the MR4
> and MR4DD2 systems from Agient/Varian. They seem VERY unreliable.
>
> Thanks
>
> --
> Ken Knott
> Department of Chemistry
> Analytical Services
> Virginia Tech
>
> (540)267-6502 (Cell)
> (540)231-0885 (Office)
Received on Mon Aug 10 2015 - 08:51:32 MST