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LF: Fw: [rsgb_lf_group] Re: New Opera QRG for 472 Khz Band ?

To: "rsgb" <[email protected]>
Subject: LF: Fw: [rsgb_lf_group] Re: New Opera QRG for 472 Khz Band ?
From: "mal hamilton" <[email protected]>
Date: Fri, 15 Jun 2012 13:14:28 -0000
Reply-to: [email protected]
Sender: [email protected]
Dave
Activity has already started on the new 472 band and this could set the trend by the time we get there. I have observed some CW , QRSS and Beacon acty already.
Any frequency that takes your fancy.
 
g3kev
 
----- Original Message -----
Sent: Friday, June 15, 2012 12:23 PM
Subject: Re: [rsgb_lf_group] Re: New Opera QRG for 472 Khz Band ?

 

It seems rather strange that when this allocation is still at least 6
months away for most of us (DL excepted) we are already talking about
where to fit in a specialised data mode... I expect there will be
significant interest in the band, when it arrives, and will attract far
greater interest in the general community than has 136. As such any
bandplanning should follow the practice on the higher bands - with CW
at the bottom, then a small data slot, then SSB (is there enough room
for that?...). It may even be sensible to split it 50/50, with cw in
the bottom 3.5kHz and all modes (including data) in the top half.

Whatever, if Opera (the data mode) is going to be the default mode on
this band you are unlikely to see me anywhere near it. And Opera (the
browser) released a new version yesterday at exactly the same time as
the original message in this thread was posted...

73 Dave G3YMC

On 15 Jun 2012 at 13:13, Mike Dennison wrote:

> I agree there should be thought given to bandplanning. Where, for
> instance, should I set my QRSS receiver?
>
> However, the band is 7kHz wide and the suggestion to "go 1k up may be ,
> 473 dial to give room for cw etc" would in fact give just 2.2kHz of the
> band for what will presumably be the most popular mode. Currently the
> two modes of the 500kHz version of Opera occupies from 1.2kHz to 1.8kHz
> above dial frequency.
>
> I think we need first to look at how much each mode might occupy. A
> useful division might be 3.8kHz for CW, 0.2Hz for QRSS (perhaps in two
> wide-spaced sub-bands) and 3kHz for all "data" (machine-read modes
> including Opera). There is an argument that any mode involving beacons
> (including some uses of QRSS and Opera) should be widely separated from
> two-way QSOs.
>
> Lower bandwidth modes should be nearer the band edge. Perhaps 'DX' modes
> should avoid the active NDB frequencies - say between 476 and 478kHz.
>
> Currently, it seems that Opera had a dial frequency of 500kHz, and the
> 1.2kHz below it has some QRSS activity (eg IQ2MI). That sort of
> arrangement may work on 472kHz provided the Opera allocaton does not
> eventually migrate as it did on 137kHz.
>
> Perhaps in the short term there should be allocated (or at least
> agreed) frequencies with an understanding by all that there will need to
> be adjustments eventually.
>
> All food for thought.
> Mike, G3XDV
> ===========
>

http://www.davesergeant.com

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