Hi Marco, MF,
Am 05.07.2013 20:59, schrieb Marco Cadeddu:
Hello LF/MF,
I just got a call from Cesare I5TGC,
an old man, old timer with young heart!
He told me that he's now active also
on 470 kHz with an update off his transverter and antenna.
That is fine :-)
He regrets that although he placed
several calls he got no replies
What is several? On HF, several is say 4 or 5. On MF, several is 40 or
50 minutes! I often called CQ for more than one hour without any
replies and i assume people can hear me.
I guess it is just the time of the year! People may prefer BBQ and
beeing outside until it's dark and then going to be, or listening into
the band for 1 or 2 minutes ;-)
Certainly it will work soon! However if he goes to bed at 20 UTC, the
chances are small too. It is definitively a night band. 22 UTC is a
good time. BTW the summer propagation is much better than i expected,
at least in the range below 1000 km.
And of course we can make a sked. QSP!
73, cul
Stefan/DK7FC
(only a QSO with Marzio who lives
abt 40 km away.
He noticed also that the band is
plenty of digital modes (WSPR Opera) but apparently nobody on the air
with QRSS. I explained him that due to the band characteristics when
condition are good the traffic takes places in CW... but when signals
are digged in the noise only digital modes are looking to give resoults.
Due to the ...birth date (hi) he
regrets he can not stay up after 2200 local time (now 2000 UTC) so he's
missing something but hopes when winter will approach again to hear
somebody..
CU
Marco IK1HSS
(still with no antenna to
transmit...)
-----
Original Message -----
Sent:
Friday, July 05, 2013 4:26 PM
Subject:
Re: LF: Wellbrook RX loops
Hi Roger
I use a Wellbrook Loop type ALA1530 (MW/HF) mounted 1m off the ground and a PA0RDT
mini-whip mounted about 7m above ground. Sometimes the loop wins
other times the miniwhip. The miniwhip is omnidirectional and uses
the e field, whereas the loop is directional and uses the magnetic
field. The miniwhip is more open to BC breakthough than the loop but
more sensitive. I tend to monitor with the miniwhip, and switch to
the loop after homing in on the signal if this helps. BC breakthough
is overcome using a simple series LC circuit tuned to the required band
at the RX end of the coax. The QRM at my QRT can be horrendous, as I
am only 100 yards from the OH lines on the East Coast main railway
line, surrounded by houses and a block of flats with associated busy
roads. My 'T' transmitting aerial 8m high is useless for RX. I can
fully recommend both miniwhip and Wellbrook Loop, both of which cover
from LF to 10m. For best results, I suppose a tuned loop about 1m
square has the edge, but not as convenient.
73 Dennis M0JXM
Can anyone advise, from actual use, how well a Wellbrook loop works on
136 and 472kHz RX ? The excellent OIP2 and OIP3 figures and directivity
suggest one could be very useful.
73s
Roger G3XBM
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