Message-ID: <3AD720CE.7B1CD122@mailsrv.dii.unisi.it>
Date: Fri, 13 Apr 2001 17:52:46 +0200
From: "valerio gabbani" <valerio@mailsrv.dii.unisi.it>
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To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: IK5ZPV received agn
References: <9755.200104111034@gemini>
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James Moritz wrote:

> Dear Valerio, LF Group,
>
> I made 3 recordings of IK5ZPV's "Wolf"  signals on 137.5kHz last
> night; one made between 2000 and 2025utc produced no decoded
> results, however the other 2, from between 2100 and 2200, both
> decoded without problems after the 2nd and 3rd data frames
> respectively. The message was "TST IK5ZPV 10W", and the
> indicated frequency offset was between +0.15 and +0.4Hz. We are
> now reaching what must be QRP by anyone's standards, and there
> still seems to be some margin on signal strength. Conditions
> seemed to be quite noisy last night, so lower powers should be
> possible.
>
> Valerio - I would be interested to know some details of TX
> equipment and antenna you are using for these tests - seems to be
> working well , whatever it is!
>
> Cheers, Jim Moritz
> 73 de M0BMU

Dear Jim and others,
the setup i'm using to test Wolf is almost the same i use since 1999.I
made only some improvements to ground adding some hundreds meter of wire
but with small change in inpedance.
The antenna is the same 100mtX15mt L, and the TX is G3YXM design.
The wolf stream is sinchronized with the RF carrier and BPSK modulation
is obtained with a couple of x-or gates.
I wish to continue with wolf transmissions in the next days. I will use
different power level, starting from 20:00 UTC.

Many thanks to all for the reports,

best wishes, '73
Valerio