[Elecraft] Help with noise on 40m

[Zac Brown]

I made a few recordings of some noise that I hear on 40m tonight. The 
.wav files can be downloaded at the address below. I have no idea what's 
causing this noise, or how to filter it out. Is this the type of noise 
that the KDSP2 or KNB2 could remove?

Thanks,

Zac
KD5IEF

http://homepage.mac.com/zac_brown/FileSharing44.html