Message-ID: <000b01c3d915$ecdaaac0$6507a8c0@Main>
From: "Alan Melia" <Alan.Melia@btinternet.com>
To: rsgb_lf_group@blacksheep.org
References: <007a01c3d870$20dd0bc0$0500a8c0@charter.net> <304614133.20040112111754@dx.ru>
Date: Mon, 12 Jan 2004 14:10:56 -0000
MIME-Version: 1.0
Subject: LF: Re: Re: First WOLF QSO!
Content-Type: text/plain; charset=iso-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
Sender: <owner-rsgb_lf_group@blacksheep.org>
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

Hi Ed, as John says, I do not recall any two-way WOLF qsos. I think only Jim
M0BMU, Andy G4JNT have transmit it, that I can remember. It is basically an
"off-line" decoding system, where with weak signals one may have to process
the recorded file several times. I think a lot of us were waiting and maybe
hoping for a "instant", real-time version. Then Alberto came along with
Jason as a keyboard decoded mode, and WOLF did not seem to progress.
(Stewart provided  some adaptive code to improve the decoder in Alberto's
system)  I also believe that WOLF is transmit as BPSK which generally
requires a linear PA. (Jason is an FSK mode so can use non-linear PAs)
Generally for high power station one requires a DDS exciter with a non
linear PA, to prouce "soft" phase transitions. It is possible with some
hardware that Jim developed to produce soft phase changes which would be
required on a high power station to control bandwidth. I dont think the
bandwidth is such an issue with FCC Part 15, 1 watt output, stations.
Details from memory (liable to suffer dropped bits these days ...:-)) Look
at
http://www.scgroup.com/ham/wolf.html
for the full story.

Well done on repairing the aerial at Machta and we look forward to hearing
your signals again.

Cheers de Alan G3NYK
alan.melia@btinternet.com


----- Original Message -----
From: "Ed Lesnichy" <ed@dx.ru>
To: <rsgb_lf_group@blacksheep.org>
Sent: 12 January 2004 11:17
Subject: LF: Re: First WOLF QSO!


> John, Dex and LF-enthusiasts!
>
> My congratulations to John W1TAG and Dex W4DEX!
> It is remarkable result at such very small ERP!
> I believe what to RX a very weak signal at 1w DC input max (not 1w
> ERP!!), and antenna less than 15m on distance abt 1080km it is very
> difficult in any modes...probably in WOLF is especial...and at the
daytime...
>
> On what greatest distance it was possible to RX in long QRSS such small
> ERP at night?
>
> US's Lowfers have saved wide experience in reception of very weak
> signals on LF - when already they will appear on 136 or 160-190kHz for
> longway 2-way QSO with high-grade ERP?
>
> The first(?) reception of Europe signal in North America on WOLF:
> John W1TAG RX Jim M0BMU at March 9, 2001 at QRB abt 5307km
>
> Whether who has made 2-way QSO on WOLF in Europe?
>
> When (date) Stewart KK7KA has made WOLF mode?
>
> 73! Ed RU6LA  ed@dx.ru  http://136.73.ru
>
>