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Re: LF: Re: US 500-kHz band plan

To: <[email protected]>
Subject: Re: LF: Re: US 500-kHz band plan
From: "Graham" <[email protected]>
Date: Mon, 21 Sep 2009 20:42:16 +0100
Importance: Normal
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Jim,

Emails  have  crossed in the system hi.

I note the reply , re USA  operating frequency's

The large gap in frequency made itself apparent at the time of my first post , but with the availability of digital receivers, with the ability to capture quite large spectrums, as can be observed on for example Gary's grabber page http://myweb.tiscali.co.uk/wgtaylor/grabber2.html
perhaps the gap is not as problematic as might be of been in the past ?

A more conventional solution may be to channel scan with the rx , assuming the rx may be controlled by the pc ... how much of the wspr signal do you 'actually need' to decode, what happens if you chop it.. room for experiment ?
G .




--------------------------------------------------
From: "James Moritz" <[email protected]>
Sent: Monday, September 21, 2009 7:40 PM
To: <[email protected]>
Subject: Re: LF: Re: US 500-kHz band plan

Sorry, pressed "send" too soon by accident!

Dear Graham, LF Group,

As the  European allocation looks to  be  wider than the  Uk, are we
expecting the  UK 3 Khz  allocation to  remain as is, if  and when the
band is formalised ?, in which case loosing 200 hz may not be the  most
sensible option ...
As I understand it, there are not yet any formal Europe-wide proposals,
just
what individual regulators have allocated on a case-by-case basis. I think
G, EI, and ON have all allocated 501 - 504. The DL beacons and OK0EMW are
licenced to use spot frequencies around 505kHz. Gus SM6BHZ would be able to
use 504.0 - 504.1kHz.

But the main thing is whether we over here should transmit around 504kHz as we are now, or shift to near 501kHz to share a common WSPR segment with the US. On one hand, keeping to near 504k would have the advantage of no strong
signals in band for those trying to receive US stations. But on the other
hand, it might mean we get QRMed by "general comms" US stations for those
trying to receive us, and anyone wanting to receive both US and EU stations
would need two receivers/soundcards, etc.

Cheers, Jim Moritz
73 de M0BMU





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