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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 -----
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]>
To:
<[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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