[UK-CONTEST] Extra 100KHz on 40M - What does Non-interference basismean?

[Colin G3PSM]

Alex,

Let us assume that the BBC Station at Zigy (or whichever way you want to
spell it)in Cyprus is on 7140 kHz broadcasting to the Middle East.   You
happen to be working the U.S. on or around the same frequency.   The
likelyhood of a station in the UK using the maximum permitted ERP causing
problems to a broadcasting station running (say) 250kW and beaming into the
Middle East is pretty remote, you must agree.

Now, if a listener of Middle Eastern origin in Loughborough just happens to
be listening to this particular station at the time then he might just have
a problem.   HE might have a problem, you won't as the listener is not
located in the target area of the broadcasting station.   Broadcasting
stations in Region 1 and 3 are not permitted under the Radio Regulations to
direct their transmissions to Region 2 in the segment 7,100 - 7,300kHz and
the very few stations currently operating out of Europe direct their
transmissions to Africa and the Middle East.

Hopefully that answers the question but I will be carrying out a survey of
broadcasting stations between 7,100 and 7,200kHz once the Broadcasting
Winter Season B04 gets under way on October 31st.

Obviously the advantage for UK amateurs initially will be that the
rag-chewers will have wide open spaces during daylight hours in which to
contemplate the state of their bunions or whatever.   The challenge for
DXers during hours of darkness will be in working between the broadcasters
located in Cyprus, Singapore, Madagascar, South Africa and other remote
parts.   I am assured that Zigy will move from 7,140kHz to 7,4XXkHz as soon
as they have trimmed the antennas and carried out a periodic maintenance.
Then Bob and George and Co. will be able to operate on 7,140 kHz once Cyprus
follows our lead.

73

Colin, G3PSM

-----Original Message-----
From: uk-contest-bounces at contesting.com
[mailto:uk-contest-bounces at contesting.com]On Behalf Of Alex G3ZBE
Sent: 30 September 2004 19:11
To: uk-contest at contesting.com
Subject: [UK-CONTEST] Extra 100KHz on 40M - What does Non-interference
basismean?


Extra 100KHz on 40M - What does Non-interference basis mean?

It looks like we may get the 100KHz extension to 40M soon, as a
“Secondary user on a Non-interference” basis (I think that was the
correct phrase).

Yesterday evening at about 20:00z, I tuned across 7.1 to 7.2MHz using my
500Hz CW filter to see where I could conceivably work a fellow amateur.
I could just about kid myself at a couple of points that there was a
space (S7!).  But just what does “non-interference” mean.  I’m sure if I
were to call on one of the aforementioned “spaces” and anyone was
listening to the adjacent broadcast station with a broadcast receiver I
would certainly cause interference to the listener!   Would I then be
failing to operate on a non-interference basis?  I would imagine that
the broadcasters are going to be there for a long time yet. So just what
is the situation?  Or is this one of these questions I shouldn’t ask :0)

Alex

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Member of: RSGB, ARRL, CDXC, GMDX group,
G-QRP, DeMontfort A.R.S.
Remember....It's just a hobby!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



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