IARU REGION-1 50MHz BAND PLAN – CHANGES TO METEOR SCATTER USAGE

Author Post

David, G4ASR

Fri Nov 06 2009, 03:22PM
I have just written this paper in my role as RSGB VHF Manager and member of the IARU Region-1 VHF/UHF Committee. It will be presented at the IARU Region-1 *Interim* meeting in Vienna, March 2010. Please note that this is not the Full Conference (being held in 2011) and that this paper may not be ratified until then. However it can be agreed in principle at the interim meeting.

This paper is uncontentious insofar that it actually brings the IARU Region-1 50MHz band plan in line with current practice both in the UK and further afield within IARU Region-1.

Please feedback comments here (preferred) or via my email address.

50MHz BAND PLAN – CHANGES TO METEOR SCATTER USAGE.

BACKGROUND

The IARU Region-1 50MHz band plan shows Meteor Scatter centre of activity as 50.200MHz.

Furthermore the band plan shows:

50.255MHz: JT44 transmissions,

50.260 – 50.280MHz: FSK441 transmissions with 50.270MHz as the FSK441 calling frequency.


CURRENT SITUATION

The reality is that meteor scatter operation, typically using JT6M, one of the MGM (Machine Generated Mode) modes is practiced on and around 50.230MHz.

JT44 is now a redundant mode and has never been used on 50.255MHz.

Although FSK441 is a popular mode on the 145MHz band its use within the 50MHz band is particularly low and has never been practiced in the sub-band 50.260 – 50.280MHz.


NOTE

A number of digital MGM transmission modes have been specifically written into the band plan that over time have either been superseded or made redundant by newer techniques.

It is therefore better practice to mention within the Usage column Meteor Scatter (MGM) rather than specific digital modes.


PROPOSAL

To delete within the IARU Region-1 50MHz Band Plan –

50.200MHz: MS centre of activity

50.225MHz: JT44

50.260 – 50.280MHz: FSK441

50.270MHz: FSK441 calling frequency

To introduce within the IARU Region-1 50MHz Band Plan –

50.230: Meteor Scatter (MGM) calling frequency

50.210 – 50.250MHz: Meteor Scatter (MGM)

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Ken, G4IGO
Fri Nov 06 2009, 05:06PM
Ken, G4IGO
Registered Member #31
Joined: Tue Mar 18 2008, 08:16PM

Posts: 62
Hello David. I agree.
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Arie, PC7M
Sat Nov 07 2009, 01:46PM
Arie, PC7M
Registered Member #120
Joined: Wed Apr 02 2008, 07:23PM

Posts: 2
Hello David !

I agree !!

73 Arie / PC7M
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