Re: LF: WSPR, QRSS, CW...

[<jrusgrove@comcast.net>]

Brian

Long time...glad to see you're still here. What are you up to on LF / MF?

Good point. Even a dead carrier conveys information...just not from the 
transmitting end.

Jay

 
----- Original Message ----- 
From: "Brian" <brian.rogerson@sapo.pt>
To: <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, January 12, 2010 5:46 AM
Subject: Re: LF: WSPR, QRSS, CW...


> John, LF
>
>
> On Mon, 2010-01-11 at 14:16 +0000, John P-G wrote:
>
>
> > Only a continuous, unmodulated carrier conveys no information (beyond
> > its frequency), so all the methods currently being discussed (QRSS,
> > CW, DFCW, Hell, PSK - yes even WSPR) are forms of information
> > transmission i.e. "message passing" - and thus would fit your reading of
> > "self-training in radio communication". 
>
> A minor point but a 24 hours continuous transmission of unmodulated, gps
> disciplined carrier on 137 KHz over 1000Km path (approx) apparently
> reveals quite interesting data on propagation dependent phase change if
> received appropriately. 
>
> > Now, let's all just get on and play radio....
>
> Brian CT1DRP