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Re: VLF: WOLF, next step..

To: [email protected]
Subject: Re: VLF: WOLF, next step..
From: Stefan Schäfer <[email protected]>
Date: Mon, 30 Jan 2012 19:24:45 +0100
Cc: Paul <[email protected]>, Mike Smith <[email protected]>
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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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