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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.
He regrets that although he placed several calls he
got no replies (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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