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From: Steinar Aanesland <saanes@broadpark.no>
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Date: Mon, 30 Jan 2012 20:12:19 +0100
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Subject: RE: VLF: WOLF, next step..
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Hi Stefan

It will be very interesting to see the result of your test . =20
I was using wolf on one of my first tests on 8970 Hz.  It was easy to =
pick up the signal a few km from my earth pole TX antenna,=20
but I was  driver around with my laptop and a small multi turn loop =
antenna,  and did not tested a long time transmission.


la5vna Steinar





-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org =
[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Stefan =
Sch=E4fer
Sent: 30. januar 2012 19:25
To: rsgb_lf_group@blacksheep.org
Cc: Paul; Mike Smith
Subject: Re: VLF: WOLF, next step..

Bill,

Just downloaded WOLF at http://www.qsl.net/dl4yhf/wolf/index.html

Looks very easy from the first view. No installation required, the =
program is < 1 MB, works at once! CPU usage  below 1...2 %

I set the samplerate to 24 kS/s and the center frequency to 8970 Hz. =
Works!

Changed the phase reversal time from 0.1 s to 0.111482720178372 s
(=3D1000/8970Hz) Seems to work.

Will do a test on my >10 years old HP notebook that generated a many =
hours 8970.00000 Hz signal without a single phase glitch. First
i'll determine the actual samplerate using SpecLab.

First a PC-to-PC test, then from the fixed antenna. BTW i want to try a =
ferrite HV transformer from an old TV (called LOPT?) and see
if i can make it to my home QTH in 1 km distance ;-) Let's see if it =
works.

Have i misunderstood or forgotten something so far?

73, Stefan/DK7FC





Am 30.01.2012 03:06, schrieb Bill de Carle:
> At 08:35 PM 1/29/2012, Stefan DK7FC wrote:
>> Thanks Bill,
>>
>> Many mails. I'm just answering your first one, pse QRX ;-) Can the=20
>> WOLF10 program configured to generate a 8970 Hz audio output?
>
> I don't know about the WOLF10 program, but Stewart's original=20
> command-line WOLF program can generate a .wav file at 8000 s/s with a=20
> carrier frequency of 2990 Hz (I just tried it and it worked).  If you=20
> triple that frequency (should be easy) you'd have 8970 Hz and the=20
> third harmonic phase changes should still be OK for decoding.  Odd=20
> BPSK harmonics decode successfully, even ones don't.
>
> 73,
> Bill VE2IQ
>