razor QRN ; comes from the Dreambox satelitte reciver , specially from its hard disk!!!stringer on the 17-11 mHz bands
ADSL QRN just supposing cominmg from the ADSL lines
unknown QRN: sudden appearance from unknown kind of QRN on all HF bands . It was nice that most of it can be reduced by switcing on the noise blanker
If you know any ideas what can be this unkkown please let me know