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Ok Pete
Well rx ae site is critical , after the
'wall of noise' vanished towards the end of
last year , 500 was quite usable , until the
very end that was ..
I did experiment with a small toroidal near
field ae and could see the beacons on
505 , though at a very low level, the s/n ratio
was quite good , did toy with the idea of
making a pre-amp , but could never decide if
it was a low or high z feed ...
You only have to work portable to
appreciate the level of rf-noise in a built up
area ! my marine hf-rx has a noise
source to enable the pre-selector to be tuned ,
assumedly in normal use its a little quiet !
73 -G..
Sent: Saturday, January 05, 2013 10:03 AM
Subject: Re: LF: A good night on 472
Hi Wolf and Graham
It was so nice to hear the band literally full of CW. And thanks for
the info Wolf publishing your working conditions is very helpful. In my case I
am interested in the RX side as well. I am currently using on RX a 2m
7/8th whip at 50ft+- connected straight
into my TS690s transceiver, have 500 / 250 filters
fitted. Although signals are not strong they are all good copy and
both sides of each qso was readable. The
noise level was very low. If I use an open wire ant those signals I can hear are
very strong but the far stations are lost in noise. So the noise I am getting is
from the house (mine and next door) low down. The whip seems mostly out of
range of the worst noise. That may be of use to you Graham. However I know you
are not the only one to suffer from the Xmas decorations at the moment. Also 472/9 seems a quieter part of MF than 501/4. The general noise floor on the SDR is lower but I don't know
why.
73 es GL Pete M0FMT IO91 UX
Hi Pete,
Thanks to all involved,
and indeed it was a nice evening with almost no QRM this side (except from the 'primary users').
9H was
again audible with his remarkable slow cw (but not QRSS) around 478.446 kHz.
Nice to hear / work GI, EI, GW, G, HB9, PA, SM,
OK, and DL; all active tonight.
60
watts output from the TX seems to be sufficient here (about 1.5 A antenna
current, wire between 7 and 11 m above ground, total length 60
m).
73,
Wolf DL4YHF
.
Am 04.01.2013 22:42, schrieb M0FMT:
Hi all
A good night on 472
heard so far but not necessarily in that
order >>>>>
sm6bgp
df0wd
g0min
gw4hxo
hb9asb
pe5t
and a couple missed
All very nice signals clear and well above the noise with
me!
Oh and all on CW Tnx
73
73 es GL es HNY Pete M0FMT IO91UX
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