[hpsdr] multiple Alex sets

[Joe Martin K5SO]

In case anyone was wondering if there would be any problem using  
multiple Alex filter sets with multiple Mercury receivers, there  
isn't.  I received my Alex Tx/Rx filter sets recently and have  
connected one to each of the three Mercury receivers on the Atlas  
bus.  All switch fine and exactly as expected.

The Alex board sets are a great addition to the HPSDR radio and they  
work flawlessly here as far as I can tell so far!  Thanks for doing a  
wonderful job on it guys!

73,  Joe K5SO