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/
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>
>> >
>> >
>> >
>> >
>> >
>>
>>
>
>
>
