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Author Topic: Who does the band planning for US bands? Increase 10 FM subbands.  (Read 834 times)
N1AUP
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Posts: 209




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« on: March 13, 2019, 09:12:10 AM »

I'm a huge fan of 10 M FM.  My interest was cemented back in the 1980s, when I converted a Hygain CB into 10FM, and worked a four way through the Virgin Islands Repeater on 5 watts with hams from Britain, Wyoming, Mass and Florida.  The participants were full quieting, like they were on two meters FM.

The ham subband for 10 FM is tiny, and the number of repeater pairs is severely limited.  I know that it's impossible to move the lower limit of the 10 FM subband lower because of satellite activity, but there seems to be space in the SSB portion of the band that might accommodate FM expansion.  Maybe we could morph the 10 M FM repeater input band below the satellite area, and use the current input area for more simplex and repeater channels.

Who handles sub band planning, and how does one go about proposing changes to the current plan?  I'd even be willing to try to see if hams could move the upper end of ten into the area around 29.7 - 30.0 or even higher.  It can't hurt to ask.

Curious to hear people's thoughts on how we could make this happen.

Chris
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N1AUP
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« Reply #1 on: March 13, 2019, 09:37:43 AM »

Also, what about moving the lower end of 10 M into the no mans space above CB? 
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N1AUP
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« Reply #2 on: March 13, 2019, 09:52:31 AM »

Also, is there current satellite activity from 29.3 to 29.5??

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AC7CW
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« Reply #3 on: March 13, 2019, 09:58:09 AM »

I love 10 meter FM: Watt for watt it's as effective as SSB albeit at a greater bandwidth, the audio is awesome and an amplifier doesn't even have to be linear. I've chatted with hams all over the globe on 10 FM at 10 watts when propagation was good and I'm looking forward to doing that some more if propagation gets better. 

I worked for a construction company way back in the day. They had a radio that operated at about 30Mhz for directing work. Propagation was very good at the time and I'm sure that their "bring a wheel barrow and a hoe" comms were going worldwide. I'm not sure what's allocated just above 10 meters but it's possible that the FCC could revisit it.
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Novice 1958, 20WPM Extra now... (and get off my lawn)
K7RJB
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« Reply #4 on: March 13, 2019, 11:58:07 AM »

I think the ARRL has a major influence in the band plans.
The rest is purely financial, ham radio gets the leftovers.
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W1VT
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« Reply #5 on: March 13, 2019, 12:25:43 PM »

http://www.arrl.org/wrc
Every few years the International Telecommunication Union (ITU) holds a World Radiocommunication Conference (WRC) to review and revise the international Radio Regulations in accordance with an agreed agenda.
« Last Edit: March 13, 2019, 12:28:59 PM by W1VT » Logged
N2AYM
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Posts: 49




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« Reply #6 on: March 13, 2019, 12:47:54 PM »

Per the Consolidated Frequency List in an old "Police Call book"

24.990-25.010 Standard Time and Frequency.
25.070-25.097 ITU Maritime channels 2501-2510, Ship Transmit
25.020-25.320 Petroleum Products
25.550-25.670 Radio Astronomy
25.335-25.635 ?
25.650-26.100 11m International Broadcast
25.870-26.470 Broadcast Auxilliary (Remote Pickup)
26.145-26.172 ITU Maritime channels 2501-2510, Coast Transmit
26.485-26.605 ?
26.620 Civil Air Patrol
26.635-26.950 ?
26.965-27.405 CB Radio
27.430-27.530 Business
27.545-27.985 ?
27.680-27.980 Australian 11m Maritime channels 68-98 (Ten total)
28.000-29.700 10m Amateur
29.710-29.790 Forest Products (Logging)
29.805-29.885 ?
29.900 US Army
29.915-29.985 ?

Some of these allocations overlap, and there are some conflicts
between International, and domestic USA allocations.

It looks a little too busy on this list - Not a good idea!
« Last Edit: March 13, 2019, 12:52:43 PM by N2AYM » Logged
WD9EWK
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« Reply #7 on: March 13, 2019, 03:44:50 PM »

Also, is there current satellite activity from 29.3 to 29.5??

Yes. OSCAR 7 (AO-7) has two modes of operation, and "mode A" uses 29.400-29.500 MHz for the downlink. Also, the Chinese are about to launch CAS-7A, which includes a transponder that will have a downlink in the 29 MHz satellite subband.

https://www.amsat.org/linear-satellite-frequency-summary/

http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=658 (CAS-7A information on file with IARU)

73!
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Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/ - Twitter: @WD9EWK or http://twitter.com/WD9EWK
G8YMW
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« Reply #8 on: March 14, 2019, 02:55:06 AM »

Also, what about moving the lower end of 10 M into the no mans space above CB? 

Won't work. Since 1981 that has been the UK Chip Butty band
But then, if you want music players and toilet mouths, by all means go for it (27.78125)
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73 de Tony
Windows 10:  Making me profane since March 2017
G8YMW
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Posts: 745




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« Reply #9 on: March 14, 2019, 02:59:22 AM »

Also, is there current satellite activity from 29.3 to 29.5??

Yes. OSCAR 7 (AO-7) has two modes of operation, and "mode A" uses 29.400-29.500 MHz for the downlink. Also, the Chinese are about to launch CAS-7A, which includes a transponder that will have a downlink in the 29 MHz satellite subband.

https://www.amsat.org/linear-satellite-frequency-summary/

http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=658 (CAS-7A information on file with IARU)

73!


I'm surpried OSCAR 7 is still working after all these years
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73 de Tony
Windows 10:  Making me profane since March 2017
WD9EWK
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« Reply #10 on: March 14, 2019, 09:48:05 AM »

I'm surpried OSCAR 7 is still working after all these years

OSCAR 7's batteries had a failure in the early 1980s, but something changed in the early 2000s when the satellite came back to life. It has been active much longer in its second life - operating without onboard batteries - than when those batteries worked properly in the 1970s into the early 1980s. As long as the stations using OSCAR 7 don't transmit with too much power, it works very well, and works well with portable/QRP stations. And, on occasion, it is active in "mode A" transmitting on the high end of the 10m band.

73!
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Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/ - Twitter: @WD9EWK or http://twitter.com/WD9EWK
N1AUP
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Posts: 209




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« Reply #11 on: March 16, 2019, 05:04:14 PM »

All right, then what about reassigning a bit of space from the top of the 10 M SSB section, and make that the 10 M FM repeater inputs?

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G8YMW
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Posts: 745




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« Reply #12 on: March 16, 2019, 05:29:45 PM »

That won't work either.
When the band is open across the pond, I hear plenty of Ancient Mode nets around 29.0 MHz
Also 3 or 4 years ago there was a contest on with the band chock-a-block up to the satelite sub band
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73 de Tony
Windows 10:  Making me profane since March 2017
K0UA
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« Reply #13 on: March 17, 2019, 06:53:31 AM »

To be honest with you, I think we are all pretty happy with 10M FM just as it is. I know I am.
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N1AUP
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Posts: 209




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« Reply #14 on: Yesterday at 03:37:58 PM »

That won't work either.
When the band is open across the pond, I hear plenty of Ancient Mode nets around 29.0 MHz
Also 3 or 4 years ago there was a contest on with the band chock-a-block up to the satelite sub band

Well, AM can be easily moved unlike satellites.  After all, the 10 meter band is nearly 2 mhz in size.



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