Dear Chris,
This is a very pleasing message. I am happy and proud about this. :-)
Well, 2872 km is a real heavy challenge! But surely i will try to send
you a suitable signal (seems, i need a new generator ;-) ) and the
winther season may help us a little.
Oh, sri, if you are new in the group (?), welcome! :-)
First, most of the activity is on LF/137 kHz or MF/500 kHz, as you
probably know. Have you ever been RXing on 137 kHz? I think some people
would be very interested to be copied in Israel. Me too. I plan to be
QRV again on 137 with the kite antenna soon...
Regarding VLF RX antennas: The PA0RDT mini whip is used by many RX stns
on VLF (mostly with some modifications, such as higher C and L values
and/or band/low pass filters) and is prooved to be well suitable. There
seems to be a tendency that E field antennas are performing better than
loop antennas in a noisy region and are mostly better than a long wire
antenna.
I have built an E field antenna too which is running all the time on my
grabber
(http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html).
You can see the antenna here:
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber_Antenna_location.html
and the circuit of the antenna is here (today updated!):
http://www.iup.uni-heidelberg.de/schaefer_vlf/8,97kHz%20active%20E%20field%20antenna%20by%20DK7FC.jpg
Chris, there was a lot of knowledge accumulated in the last months here
in the group, so if you have any questions, just ask. No problem ;-) I
have no ideas about SDRs here but all the experts are HERE! ;-)
73, Stefan/DK7FC
PS: Good luck building the antenna!
Am 28.10.2010 21:07, schrieb Chris Gomoiu:
Hello Stefan and LF group,
I would be also interested to check for your signals or those of
others. I don't have a LF antenna yet but using the 24m long LW I
managed to hear PA0A on 502.4Khz WSPR. Willing to try even lower in
frequency and would appreciate any info which may help. Found lots of
resources on the net and I'm slowly trying to familiarize myself with
the LF challenges.
Planning to construct a PA0RDT mini-whip this weekend and see how it
works in my noisy area. Found out that my ADSL modem completely wipes
out the 600m band so I switch it off when listening. Using an HPSDR
transceiver here GPSDO locked. No LF-VLF TX permit available here yet
but I can always listen.
73's Chris 4X1RF
KM72LS
2010/10/28 Stefan Schäfer <[email protected]>
LF,
Yesterday in the evening i've got the below message from Jay. After
that i wrote an email to TF3HZ and told about VLF, gave him some links
and asked if he would be interested to try an attempt to receive my
signal...
He has already installed SpecLab and IS interested. He will build my
active E field antenna and has ordered the BF862's this morning!
Distance is 2412 km! ;-)
What a progress! Unbelivable!
73, Stefan
Am 27.10.2010 21:33, schrieb [email protected]:
Stephan
I've seen WSPR spots on 500 kHz from TF3HZ. Maybe he can be coaxed to
QSY down a bit.
Jay
----- Original Message ----- From: "Stefan Schäfer" <[email protected]>
To: <[email protected]>
Sent: Wednesday, October 27, 2010 3:25 PM
Subject: LF: TF?
Dear group,
Does anybody know if someone from Iceland (TF) is QRV member of this
group or are there OMs who are (or have been) active on LF?
You know what i am thinking about ;-)
73, Stefan
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