[ADXA] The 30 Meter Band

[w5zn at w5zn.org]

CORRECTION:

(WRC, formerly knows as a "World Administrative Radio Conference" WARC)

I should proof read myself !!!

ZN

On 2023-03-23 08:13, w5zn at w5zn.org wrote:

> Greetings ADXA Folks,
> 
> There was a brief thread yesterday about some unusual signals appearing 
> on the 30 meter band (10 MHz). For the benefit of our new radio 
> amateurs (and maybe a few old dogs) some general info is in order.
> 
> The 10 MHz allocation to the Amateur Radio Service was acquired at the 
> World Radio Conference (WRC, now know as a "World Administrative Radio 
> Conference" WARC) in 1979 along with the 17- and 12-meter bands.
> 
> The 30-meter band is different from the other HF bands as the Amateur 
> Radio Service allocation is secondary, not primary. The primary 
> allocation is to the Fixed Radio Service and as such radio amateurs 
> must accept interference from, and not cause interference to, the 
> primary user (Fixed). That is one of the reasons in the United States 
> we are only allowed CW and digital modes on the band (as well as it 
> being a very narrow 50 KHz allocation) and our power limit is 200 watts 
> PEP......you do know there is a power limit on 30 meters, don't you??? 
> :-))
> 
> So what the heck is the "Fixed" radio service? It is an allocation used 
> by governments around the world by embassy's, government experiments 
> (troposcatter) and other communication activities, and any 
> point-to-point communications.
> 
> It is possible that what we have heard recently is some "legal" 
> government communication on the band. Legal does NOT include 
> intentional jamming to one government's use of the band from another 
> country. We may be seeing a bit of that!!!
> 
> From time to time we will hear some weird "non-amateur" signals on the 
> band that are most likely legal in accordance with the Fixed service 
> regulations.
> 
> 73 Joel W5ZN
> 
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