Two things:
If there is almost no activity on LF, why is then QRN/QRM a problem? Or
would there really be more activity if QRN would be lower? I can hardly
imagine we would have a full band or at least seeing 10% of the people
who can transmit per week!
And there is indded the possibility to do QSOs, even in summer. I've
worked G3XIZ 3 times during the summer months. It does not work any
time but it is the same on HF.
UK stations could work each other. There are plenty of possible active
stations. But i almost never see a QSO on the G4WGT grabber. BTW i'm
just working DL6MDD for the first time. :-)
Another thing: We could all work on a common project and try to set up
an easy to use FM link for a small remote located converter, perhaps
running on solar power or maybe batteries. This could be an interesting
alternative for many of us, me too of course. There could be a big
improvement by placing the RX 100m apart from the house. As long as you
don't live in the center of a city, the improvement could be above 10
dB.
Ah, still a 3rd thing that has to do with the 2nd:
Why are there not much more /p activities? It's so easy and nice to be
outside, like in the early morning which is good for groundwave QSOs.
We could arrange a small /p fieldday, an activity day instead of
mourning about the good old times.
Let's go! :-)
73, Stefan/DK7FC
PS: Just finished an outlet of my 70cm TX that is H when the squelch is
opened. Now feeding that to a BS170 that will drive a CNY17-4
optocoupler that will drive the PTT! So this allows me to key my PA
from some km distant transmitting on 43x.xxx MHz ;-) This is how we
could be QRV from /p, just with a RX antenna, having the TX at home!
Am 03.08.2011 21:01, schrieb Roger Lapthorn:
Mal
You may be right about big antennas in a decent, quiet rural location
but the majority of us now live close to modern civilisation with noise
floors that have risen some 20-30dB or more at the lower end of the
spectrum in recent years.
Top Band is almost unusable here and 80m not a lot better. I am
surprisingly lucky on 500kHz and 136kHz where I seem to be able to hold
my own on receive with my loop antenna in its favoured directions. Many
get very good results with PA0RDT type E-field probe antennas with
careful location and after efforts to minimise noise pick-up. In the
end S/N is all that matters so having a large antenna which increases
both wanted signal and noise has no benefit as long as the S/N
is as good as it can be.
With more and more difficult noise environments in most urban and
semi-urban locations I can see many people giving up amateur radio
below 432MHz. I am tempted more and more to move up to the UHF and
microwave region to get my next challenges and I live on the edge of a
village where the noise must be far less of an issue than for my city
friends.
A little more understanding of the plight of many LFers in busy cities
and some encouraging words and ideas would be good Mal.
73s
Roger G3XBM
On 3 August 2011 19:08, Chris <[email protected]>
wrote:
Hi Mal and LF,
Well, all I can say is that here
the signal to noise ratio on RX is better on my PA0RDT than it is on my
long wire (inverted 'L'). I have always thought this a bit strange,
quite often weak signals that cannot be seen on the wire are perfectly
copied on the PA0RDT. This applies from 136kHz to 3.8MHz. I cannot see
what else it can be other than local noise/QRM level. 80m is another
prime example where the noise has gradually got worse over the years
here.
Vy 73,
Chris, G4AYT, Whitstable, Kent.
--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/
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