Topband: BCB interference ?

[Ed Stallman]

  Has anyone used this High Pass Filter ? 
http://www.dunestar.com/store/160-Meter-Highpass-Filter-pid-8.html

  I found I have a 25KW AM 1520 Khz BC transmitter 12 miles from me , is 
that close enough to interfere with me receiving weak signal DX on the 
top Band ? I do hear some wide band hash 1837 to 1840 !

Though I would asking before placing an order, not sure how what to look 
for with BCB interference ?

Tnx Ed N5DG


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