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Re: LF: 630M WSPR T/A - WSPR-15?

To: [email protected], [email protected]
Subject: Re: LF: 630M WSPR T/A - WSPR-15?
From: Jochen Althoff <[email protected]>
Date: Tue, 26 May 2015 18:41:39 +0200
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I am also on WSPR-15 tonight with my tx and running 2 rx, one on wspr-2 and one on wspr-15.
73, Jochen df1vb



Am 26.05.2015 um 18:31 schrieb Andy Talbot:
I'll be putting my WSPR-15 transmission on later.
Probably starting around 2100(z)

Andy  G4JNT

On 26 May 2015 at 17:24, wolf_dl4yhf <[email protected]
<mailto:[email protected]>> wrote:

    rrr Stefan and Markus - thanks for the info.

    I have two instances of WSPR-X running, launched from the same
    directory, one configured (manually) for WSPR-2 and the other for
    -15. Not a single decode from the latter yet.

    I guess as long as they run, the two instances don't interfear (:o)

    73,
       Wolf DL4YHF .


    Am 26.05.2015 02:19, schrieb Markus Vester:
    Wolf, as far as I know the only way to separate them in the
    database seems to be sorting by frequency (which is not very
    useful otherwise). There is a peculiarity in that the hh:15 and
    hh:45 timestamps in the database seem to be "rectified" to even
    minutes (hh:16 and hh:46) at midnight UT (just happened to G4JNT
    entries).
    Stefan, I'm not sure about not using -15 on MF. Even though fading
    is faster and deeper, the WSPR decoder seems to cope well with it.
    After all WSPR-2 is useful on HF where fading happens in seconds.
    The spectrogram of Andy's transmission last night sometimes showed
    two deep fades in one sequence, but it was decoded ok. It has been
    argued that a very short and strong maximum might be utilized
    by -2 and not by -15, and maybe there's not all of the theoretical
    9 dB gain, but I reckon on average it's not much less.
    Laurence yes your frequencies are correct, dial 475.2 kHz, RF:
    475.6 - 475.8 WSPR-2, 475.8 - 475.825 WSPR-15.
    I wonder if it is possible to run two instances of WSPRX side by
    side on the same machine, one for -2 and one for -15? Or would
    they crash one another?
    73, Markus

    *From:* DK7FC <mailto:[email protected]>
    *Sent:* Tuesday, May 26, 2015 1:16 AM
    *To:* [email protected]
    <mailto:[email protected]>
    *Subject:* Re: LF: 630M WSPR T/A

    Am 25.05.2015 22:55, schrieb wolf_dl4yhf:
    p.s. is there a possibility to filter / display only WSPR-15
    decodes from the database, and how widespread is the use of that
    mode ?
    ...there have been a few MF TA tests in WSPR-15 in the early 630m
    days, showing that this mode is to slow for the path on that band.
    These tests have not been very extended though. But most likely
    there is not a 'gain' of 9 dB over WSPR-2. I would assume that
    successful detections are even less likely in that mode over the pond.

    73, Stefan

--
 -= DF1VB =-
 -= KH2MM =-
Jochen Althoff
+49 171 2020206

"The wireless telegraph is not difficult to understand.
The ordinary telegraph is like a very long cat.
You pull the tail in New York, and it meows in Los Angeles.
The wireless is the same, only without the cat."
(Albert Einstein)

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