[evlatests] ea28 L-band Polarizer

[Frank Schinzel]

I second this observation. I have been seeing this behavior of ea28 at 
L-band in 5 independent observations since February 26.

On 3/12/2022 12:19 PM, Rick Perley via evlatests wrote:
> Something is seriously amiss with the L-band polarizer in ea28.
>
> Normal cross-polarizations are typically 5%, and never more than 10%.  
> For ea28, these values are seen above 1300 MHz, but below this, the 
> cross-polarization rises quickly to more than 50% at 1050 MHz.
>
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