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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+strange\s+\"duplication\"\s+of\s+DK7FC\s+WSPR\s+spots\s*$/: 4 ]

Total 4 documents matching your query.

1. LF: strange "duplication" of DK7FC WSPR spots (score: 1)
Author: IK1WVQ Mauro <[email protected]>
Date: Tue, 20 Nov 2012 22:58:18 +0100
Hi to all, I see this strange behaviour of the DK7FC WSPR spots: 2136 -24 6.5 0.475614 0 DK7FC JN49 30 2136 1 6.5 0.475641 0 DK7FC JN49 30 2142 -27 6.5 0.475614 0 DK7FC JN49 30 2142 0 6.5 0.475641 0
/rsgb_lf_group-archives/html/rsgb_lf_group/2012-11/msg00143.html (8,692 bytes)

2. RE: LF: strange "duplication" of DK7FC WSPR spots (score: 1)
Author: Rik Strobbe <[email protected]>
Date: Wed, 21 Nov 2012 07:20:28 +0000
Dear Mauro, Stefan, this duplicate signal has been noticed in the past at +/- 50Hz, due to mains frequency humm (or ripple) at either TX or RX side. But 27Hz is a bit odd. As Stefans suggested moving
/rsgb_lf_group-archives/html/rsgb_lf_group/2012-11/msg00148.html (11,301 bytes)

3. Re: LF: strange "duplication" of DK7FC WSPR spots (score: 1)
Author: "Graham" <[email protected]>
Date: Wed, 21 Nov 2012 00:37:55 +0100
These are sideband(s) wspr is (supposed) to be a qrppp system, but with large signals then imd / synth noise / spurs will also decode if there above the decoder threshold ..one of the problems associ
/rsgb_lf_group-archives/html/rsgb_lf_group/2012-11/msg00414.html (10,762 bytes)

4. Re: LF: strange "duplication" of DK7FC WSPR spots (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Tue, 20 Nov 2012 23:26:37 +0100
Hi Mauro, Oh, good question. A difference of 27 Hz, odd. I have no idea. Other stations, including me, must observe the same. We could do the following test: I move my QRG by 5 Hz and then we will se
/rsgb_lf_group-archives/html/rsgb_lf_group/2012-11/msg00938.html (10,106 bytes)

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