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Yes JIm, , I seem to of started
something here
There are speech transmission popping
up in the strangest of place's , even on 136 Khz
!
I thought from the xdv post there was some form of
qrss level signal running mid band , not Chris
running low power trial !
Apologies to Chris over that ! Pete seems to
of taken some flack from a regulatory stance as
well
however its broken the ice , if we can get Colin
back on board , then all is back to normal
73 -G
Sent: Saturday, January 05, 2013 11:54 PM
Subject: RE: LF: AM on 472kHz
Well written
Chris
I do think those of us
who are all ?hot under the collar? about things on 472 etc would do well to take
a step back, a couple of deep breaths, and remember that it?s a hobby. It
is not the ?be all and end all? and it certainly is not worth falling out
over.
Good lord, if this was
our children in the playground then we?d be giving them a lecture on
?perspective? and ?balance?. We?d do well to reflect on that ourselves
lest we make complete a***s of ourselves.
We?ve only had 472 for
some 6 days or 18 if you count the day of the NOV nonsense and it?s caused no
end of rows and flounces. Great Scott!! Let?s all take a chill
pill or in my case a nice slug of single malt and reflect more on how to
persuade our largely sub optimal antennae to radiate more (unless you live in
Scarborough! Lol only a joke Mal!) rather than the minutae of
political/academic point scoring b***ocks.
I for one have now
tamed my USB/interface woes and will be on CW in the morning hopefully with XIZ
et al on the morning net at about 0930 or 1000
See you all then and
please Gentlemen, let?s relax a little
With my kind
regards
Jim
G7NKS
AM on
472 KHz
There has been some emotive discussion about the use of AM on the
472 kHz band.
In the first instance I must admit to having used AM on
that band for local QSO's and for test transmissions.
I have been running
5 watts of RF into my inverted 'L' aerial: length 43m, height 10m
Assuming
that my field strength is not dissimilar to the measurements I made on 502 kHz
then my ERP was in the order of 50 mW.
The total sideband power with 100%
modulated signal would be 25 mW - I run at only 50% modulation.
For
several consecutive evenings I have put out 'test' transmissions on 475 kHz
giving my station call sign and locator and asking for signal reports.
Apart
from a select few local stations who were specifically listening the only other
station having reported hearing me was G3XDV, some 20 miles distant.
The
NOV does not stipulate that AM is not permitted in the MF band and of course the
only QRG suitable must necessarily be mid-band.
I find it inconceivable
that with such low radiated power levels any amateur could cause
interference to a commercial transmission.
In that unlikely eventuality then
the offending station would be identified and shut down.
Regarding
interference to other amateur users on the band:
Having been one of the
most active amateurs on 501-504 kHz I am aware of just how difficult it is to
even 'hear' many stations on MF.
Furthermore no amateur worthy of the name
would wish to cause QRM to his fellow users.
What then is the objection
to the use of low power AM on MF ?
I shall of course and as always
adhere to my license conditions and official "gentlemen's agreements" regarding
band plans.
73
Chris G3XIZ
Honestly, is this helpful?
I have
a lot of respect for Mike and others like him, and this sort of attitude is
totally uncalled for.
73s
Roger
G3XBM
On 5 January
2013 18:46, M0FMT <[email protected]>
wrote:
We
know the RSGB owns the spectrum and want to control every issue to do with it
like they messed up VHF particularly 4m with their policemen making life for
anyone without the £5000 pound rig advertised in the RADCOM not welcome if your
centre frequency was not with a few cycles on the
channel.
Your
e-mail to me a while ago about my paltry 50watts on 136, but I never
complained about your 1000watts that flattened signals I wanted to listen too on
the band. So why do the pigeon whole brigade, with nice neat lists that have
have entry numbers, of things that can be done and can't be done the
policeman's charter that makes other peoples life a misery with "I'm alright
jack" attitude and limits experimentation. These may not be of the PhD variety
but are of the self training variety which is the Amateur radio licence
variety.
I
don't give a toss about the RSGB 's rules and I will use the spectrum within
sensible limits how I want and in line with what is in my
licence.
You
are an RSGB policeman just like the crowd on VHF! clagging the bands with
repeaters and all sorts of junk and have the cheek to complain when a
real radio amateur wants to do some off the wall tests that with in the
acres of empty spectrum on VHF people who you never hear in qso suddenly
come up and say you can't do that here it's what your numbered lists policies
create.
And now you are
doing it on 472/9. Sorry but its bonkers you are creating clones out of
radio ops who you don't want to trust with the spectrum but its not your
spectrum....... and in any case things have changed in the world and I don't
think people will stand for Diktat as they might have done in the
passed.
So
long as us amateur stay inside the band limits and our EIRPs are sensible that
is all authority is expecting us to do and what else we do I don't think they
care about provided its not mischievous. Also my guess is they will tolerate the
odd transgression without comment unless it is taking the Mickey out of our
contract (the licence).
I
would say cool the Captain Blimp approach and rub along with things and they may
not turn out to be as bad as you think. Alternatively some of us who are fed up
with lists with numbers will migrate out of amateur bands and do our own thing
like quite a few are doing, ever listened at the ends of 80m 40m 20m etc there's
a parallel universe of amateurs, even though getting a licence is a doddle these
days.... why?
Just
get real and rub along with what people want to do, you will hardly notice a bit
of AM, like the RSGB call sign isn't it
GB3FUN?
And
if my electric bill could stand it I would probably run a KW like you using an
old Decca commercial TX with its whiskers ever looked at an SDR waterfall?
My 5watts tube tx a real threat?
Mike
I won't apologies for the forgoing but I don't want to fall out with
anyone however it cannot be a one sided argument and Diktat and toys out
the pram is not the way to go, an arm round the shoulder does more than any
amount of "Laws" and lets face it no one will be hurt (unless you put you
fingers in that KW PSU you use on 136?).
Best
regards 73 es GL es HNY Pete M0FMT IO91UX
Making a
complete mockery of any attempt to persuade users of
different modes to
coexist responsibly, an AM QSO is now going on in
the middle of the
band!
I give up!
Mike,
G3XDV
--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
https://sites.google.com/site/sub9khz/
http://qss2.blogspot.com/
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