[evlatests] ea12 Q-band polarizer

[Rick Perley]

A recent (last week) observation at Q-band has revealed a clearly broken polarizer on ea12.
The cross-polarization reaches 80% at the high end of the band.
Below ~ 45.5 GHz, all is normal (about 5 to 10%), but above this there is a very sharp rise, maximizing at 60 to 80 % at just above 48 GHz.  Both polarizations are similarly affected.

Rick
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