WOLF Mode Records!

Andre' Kesteloot andre.kesteloot@ieee.org
Tue, 06 Mar 2001 15:40:35 -0500


Les Rayburn wrote:

> On this side of the Atlantic, US Lowfers are experimenting with a new weak
> signal mode
> called "WOLF" developed by Stewart Nelson, KK7KA. It has proven to be far
> superior
> to QRSS(S) mode in both off air and on-air tests to date.
>
> Lyle Koehler, K0LR conducted off air tests where he mixed a random sample
> of LF noise
> with the desired signals from a variety of modes. The results were:
>
> CW (by ear) -18db below the noise
> QRSS (3 sec dots) -27db below the noise
> QRSS(S) (60 sec dots) -31db below the noise
> WOLF -40db below the noise
>
> These tests have been further confirmed by on-air tests as well. Despite
> the Springtime
> QRN, record breaking receptions in WOLF mode have been made in the past few
> days including Stewart's reception of the XM(GR) beacon at a distance of
> 1,874 miles
> with a 1 watt input (2 milliwatt ERP) beacon.
>
> I urge LF'ers on both sides of the pond to investigate this exciting new
> mode. It offers
> the promise of Trans-Atlantic QSO's even with current US power limits...and
> certainly
> with the type of ERP common in Europe and Canada.
>
> Please note that not only is the weak signal performance of this mode
> superior to QRSS
> but also that more information can be passed in a given time frame.
> Currently, WOLF uses
> a 15 byte message format that can be totally unknown to the receiving
> station (AS WAS
> THE CASE IN ALL TEST TRANSMISSIONS SO FAR) resulting in little doubt that
> an actual reception or QSO has occurred.
>
> More info can be found on the Noise Floor Web site:
>
> http://www.highnoonfilm.com/xmgr/updates/wolf.htm
>
> 73,
>
> Les Rayburn, N1LF
> 4919 Cox Cove
> Helena, AL 35080
> XMGR 184.900khz
> 1LF 187.300khz