I received the attached message, which looks very interesting,
especially to those performing tests on VLF, around 9kHz.
But reading the referenced page, 136kHz are not ruled out...
73 Alberto I2PHD
-------- Original Message --------
Subject: VLF/LF Software Radio Transmitter
Date: Thu, 12 Jul 2001 14:27:27 -0400
From: Maitland Bottoms <[email protected]>
To: The Tacos Mailing List <[email protected]>
OK,
Since there have been discussions on both LF and Software Defined
Radios in the group, I pass along the following news...
Read up on it here:
http://www.linuxdevices.com/articles/AT3239582376.html
The gist is that you can download a floppy disk image and within a few
minutes generate VLF/LF signals.
1. Read web page
2. Click on link to download floppy image data
3. Copy floppy image to a real physical floppy
4. Boot computer with said floppy
5. Attach parallel port antenna
6. Tune receiver to listen to transmissions
Your mission, should you choose to accept it, would be to change the
code a little to allow the operator to input a callsign and then pick
OOK or FSK modulation options, and speed of morse code output.
Extra credit, emergency power bonus points:
Run this transmitter from a hand-cranked power source, using a manual
powered computer described here:
http://www.linuxdevices.com/articles/AT5746261759.html
-Maitland
_______________________________________________
Tacos mailing list
[email protected]
http://www.amrad.org/mailman/listinfo/tacos
|
