Hi Stefan
It will be very interesting to see the result of your test .
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,
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: [email protected]
[mailto:[email protected]] On Behalf Of Stefan Schäfer
Sent: 30. januar 2012 19:25
To: [email protected]
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
(=1000/8970Hz) 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
>> WOLF10 program configured to generate a 8970 Hz audio output?
>
> I don't know about the WOLF10 program, but Stewart's original
> command-line WOLF program can generate a .wav file at 8000 s/s with a
> carrier frequency of 2990 Hz (I just tried it and it worked). If you
> triple that frequency (should be easy) you'd have 8970 Hz and the
> third harmonic phase changes should still be OK for decoding. Odd
> BPSK harmonics decode successfully, even ones don't.
>
> 73,
> Bill VE2IQ
>
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