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| To: | "[email protected]" <[email protected]> |
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| Subject: | Re: LF: WSPR 15 tonite |
| From: | John Lutz <[email protected]> |
| Date: | Mon, 21 Oct 2013 06:12:12 -0700 (PDT) |
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Edgar, I looked at the grabber you linked to... amazing! I can't imagine how a low power ~135 KHz signal could span a distance of 16K+ kilometers. Very impressive. I assume the propagation mode for this doesn't involve signal refraction off the F2 layer of the ionosphere. Is that your understanding too? You mentioned: "... Also you need to pass the signal from the IDC-136II through software like HDSDR before the WSPR software." I would like to know more about this. My intention was to take the ~6 KHz audio from the IDC-136II and
route it directly into the sound card of my PC. Sounds like that wouldn't necessarily be a good idea. Am I correct in thinking that HDSDR or 'Spectrum Lab' is used to create some kind of audio bandpass filter (centered at ~6 KHz)? If so, which program would you recommend? Thanks for the guidance. John / N9JL On Monday, October 21, 2013 2:08 AM, edgar <[email protected]> wrote: Hi John, The reception is not WSPR but you may wish to look at this grabber, which is using an IDC-136II receiver to monitor DCF39 and HGA22 and DK7FC. https://dl.dropboxusercontent.com/u/101251787/testIDC.html Also you need to pass the signal from the IDC-136II through software like HDSDR before the WSPR software. The normal WSPR 2200m dial frequency is 136 kHz, signal frequency is 137.4 to 137.6 kHz. The the IDC-136II's oscillator is 130 kHz. Regards, Edgar Moonah, Tasmania. |
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