[evlatests] Rising Tsys on ea18 at Ku-band
Jim Ogle
jogle at nrao.edu
Tue Dec 6 16:28:57 EST 2011
Ea18 was one of the antennas written up last night as having cryo compressor
problems.
Jim
> On Tue, 6 Dec 2011, Rick Perley wrote:
>
> > Ken ran some 3-bit tests at Ku band this morning. Results will be
> > distributed shortly.
> >
> > However, I notice that ea18 had a high and rapidly rising system
> > temperature during the test -- starting at 80K at 9AM, and rising to
> > 120K by the time the test ended at 11AM.
> >
> > Anybody know what's going on here?
>
> The cold last night triggered many cryo compressor problems.
> this was probably one example. During the last of our 3-bit
> observations, antennas 10, 14 and 23 were stowed to remedy this
> problem.
>
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