Markus this isnt widest Ive seen - and there is a little FSK in there too - (this signals came up from New Mexico I think) - but when they come in over the Pole having crossed the Auroral oval twice the doppler is probably over 50Hz sometimes but the dispersion is so great there is no way I can read the signal beit DFCW/FSK etc - WSPR dont work etc :-) Luckily for us its not that bad at lowfer MF but I do see it at 160 quite a bit
From:
[email protected]To:
[email protected]Date: Wed, 19 Feb 2014 20:21:53 +0100
Subject: Re: LF: DCF39
Joe, Laurence,
30 Hz Doppler on 10 MHz sounds quite dramatic.
I'd be interested to look at a spectrum.
Best
73,
Markus (DF6NM)
Sent: Wednesday, February 19, 2014 7:58 PM
Subject: Re: LF: DCF39
Hi Laurence,
The 30 Hz shift of WWV on 10 MHz was
interesting too. Here it's generally
less than 2. The ionosphere
must be dancing about madly!
73
Joe VO1NA
On Wed, 19 Feb 2014,
Laurence KL7 L wrote:
> Just to prove how really odd propagation is
DCF39 138.830+ is some 20dB above "noise: at 1826Z in full daylight here over
the NPole - a lot of "shot" iono noise on the HF bands at the moment - MUF
18MHz
> Laurence KL7L
>
