Re: LF: LF tonite

[John Andrews <w1tag@charter.net>]

Markus,

> Wonder what the little dash below Stefan's "F" was... possibly local QRM
> from some MFSK PLC system? We sometimes seem to find a number of
> unexplained scattered dashes on North American QRSS spectrograms.
Yes, I live in the land of unexplained dashes, at least here in 
Massachusetts. Mixed in with the normal RF pollution are signal patterns 
that seem to suggest some form of control or communication. I was 
watching some signals near WD2XKO's frequency a week or so ago. Other 
than a roughly 10 minute spacing between start times, I couldn't find 
any real pattern. I don't recall such things from years ago, so it's 
possible that this is something new. Inquiries on the Lowfer reflector 
showed that the near-XKO signals were very local to me. Perhaps they are 
artifacts of something larger which I would see by looking at wider 
bandwidths, and I'll start looking.
The truly paranoid among U.S. Amateurs might think that these are PLC 
related signals moved into this range to provide yet more arguments 
against a 2200M ham band here. Hmmmm....
John, W1TAG