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Re: LF: VE7TIL Grabber and DCF39 Monitor back online

To: [email protected]
Subject: Re: LF: VE7TIL Grabber and DCF39 Monitor back online
From: Scott Tilley <[email protected]>
Date: Wed, 07 Apr 2010 21:05:35 +0000
In-reply-to: <CF96D480F5494B16B6A5036B93F2C247@Black>
References: <[email protected]>, <[email protected]>, <[email protected]> <[email protected]> <004201cad674$7533cd40$6d01a8c0@DELL4> <CF96D480F5494B16B6A5036B93F2C247@Black>
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Hi Markus

Wonderful suggestion! Now would make a wonderful time to make the transition in data capture as the window between VE7 and EU closes for the season.

I will investigate and post when the changes are made.

73 Scott




Markus Vester wrote:
Dear LF,
I would very much support Jay's point, and I favour the current frequency allocations for the split TA and Eu slots. Scott, how about if you traded in DCF39 for HGA22? It's slightly stronger (100 kW) and a bit further east (Budapest). The idle carrier sits on 135.43, so by tuning to say 135.2 USB, you could (just barely) fit all three in the passband. Best wishes,
Markus (DF6NM)
----- Original Message -----

    *From:* [email protected] <mailto:[email protected]>
    *To:* [email protected]
    <mailto:[email protected]>
    *Sent:* Wednesday, April 07, 2010 7:04 PM
    *Subject:* Re: LF: VE7TIL Grabber and DCF39 Monitor back online

    Mike

    Several hundred Hz separation between the W-E and E-W T/A windows
    would be nice - the old 136.318 /
    137.777 worked well. Since the EU stations have abandoned 136.318
    and moved to 137.777 it has been
    impossible to receive them here in the northeast US due to local
    activity. This has been pointed out
    over the past few years...to almost no avail.

    I'd suggest windows separation such that an average cw filter can
    separate the two. Would sure be
    nice to get back to looking for EU stations on 137 kHz!

    Jay W1VD  WD2XNS  WE2XGR/2


    ----- Original Message -----
    From: "Mike Dennison" <[email protected]
    <mailto:[email protected]>>
    To: <[email protected]
    <mailto:[email protected]>>
    Sent: Wednesday, April 07, 2010 11:43 AM
    Subject: Re: LF: VE7TIL Grabber and DCF39 Monitor back online


    > Scott,
    >
    > I do not have direct experience of running a grabber, but it
    seems to
    > me that your main difficulty is that, even with a SSB bandwidth on
    > your LF receiver, you cannot cover DCF39 and the Eu DX window at the
    > same time.
    >
    > The window at 136.318kHz was chosen to facilitate transatlantic
    tests
    > and two-way QSOs so that the west-east traffic around 137.777kHz did
    > not clash with east-west traffic. As I recall, there were QRM issues
    > in Canada or the USA which meant that this was optimum. I do not
    know
    > whether these are still relevant.
    >
    > I suggest an alternative west-east DX window just below the QRSS3
    > part of the band, ie around 137.650kHz. Provided this is not
    used for
    > daytime transmissions when QRSS3 activity is expected, it should not
    > cause QRM to other users. I would still suggest using the lower part
    > of the band for skeds.
    >
    > This would enable you and others to add an Argo window that is
    within
    > the receiver's passband, but avoids the need for Eu stations to QRM
    > the 137.777 area in order to check reception on most grabbers.
    >
    > Does this help?
    >
    > What to other users of 137kHz think?
    >
    > Mike
    > ====
    >
    >
    >
    >> If you or anyone can assist me in getting the equipment or
    expertise
    >> to get this setup I can commit to have it operational from a
    low noise
    >> site for the next DX season.
    >>
    >> I just welcomed my first child within the last year to the world so
    >> time is limited but my passion for LF is GREAT ;-)
    >>
    >> 73 Scott
    >>
    >>
    >>
    >>
    >>
    >>
    >> Mike Dennison wrote:
    >> > OK, all understood. Thanks for considering the idea.
    >> >
    >> > 73 de Mike
    >> > ========
    >> >
    >> >
    >> >> Unfortunately as the main LF RX is tuned to allow reception
    of the
    >> >> upper end of the band 137778ish and DCF39 the EU DX window
    is not
    >> >> within my passband.
    >> >>
    >> >> I hope to have a SDR online sometime in the future which would
    >> >> resolve this.
    >> >>
    >> >> 73,
    >> >> Scott
    >> >>
    >> >>
    >> >>
    >> >>
    >> >> Mike Dennison wrote:
    >> >>
    >> >>> This is good news, Scott. Is there any chance of one of your
    >> >>> grabbers being tuned to the EU DX Tx window of 136.318kHz?
    >> >>>
    >> >>> Mike. G3XDV
    >> >>> ==========
    >> >>>
    >> >>>
    >> >>>
    >> >>>> I'm pleased to report the noise problem has been resolved and
    >> >>>> most of the renovations here are complete.  The 2200m
    grabber and
    >> >>>> DCF39 monitor are back online.
    >> >>>>
    >> >>>> 73 Scott
    >> >>>> VE7TIL
    >> >>>> http://www3.telus.net/sthed/argo/
    >> >>>>
    >> >>>>
    >> >>>>
    >> >>>>
    >> >>>>
    >> >>>>
    >> >>>>
    >> >>>
    >> >>>
    >> >>>
    >> >>>
    >> >>
    >> >
    >> >
    >> >
    >> >
    >> >
    >>
    >>
    >
    >
    >




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