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Its the integrations that worry me. A spike could be
anyone and frequency alone is not Valid as I said. There has to be proper ID
like cutting the carrier or some freq shift etc on these long carrier
transmissions.
I like proof beyond DOUBT. Others can believe what
they like.
How about unannounced transmissions that would be a real
test of reception. Let the RX station specify the frequency and keying or
modulation method heard/seen, then the TX station could confirm the
details.
I had positive ID on two stations on VLF recently, one cut
carrier for ID and the other changed the keying method so there was no doubt
about confirmation and exact frequency was incidental. I also had valid
screen captures over a good period of time which I submitted.
.
MAL/G3KEV
----- Original Message -----
Sent: Friday, March 11, 2011 7:51
PM
Subject: Re: LF: OK2BVG_TX_8970
Mal
Don't underestimate Paul's system and capability: he is able to check
bearing, frequency very very accurately and do integrations over periods of
many hours. If he says it is Lubos then it most definitely is, believe
me.
73s
Roger G3XBM
Via my 2.4GHz handheld (iPod Touch 4g)
Something wrong.
You are close to Lubos and cannot see any signal but
the signal is detected in the UK.
Maybe so but but without some ID frequency alone is
not a Valid confirmation, a couple of spikes on a screen in
meaningless.
I am not convinced. I also saw a weak trace that
stopped just after 1230 but it could be anything.
de G3KEV
----- Original Message -----
Sent: Friday, March 11, 2011 6:16
PM
Subject: Re: LF: OK2BVG_TX_8970
Hello Lubos,
Sorry, i haven't seen anything it
seems. But 600 km by using 25 W at 8970 Hz would almost be a wonder
:-)
Go on and good luck
73, Stefan
Am 11.03.2011
13:47, schrieb Lubos OK2BVG:
Hello Eddie!
Thanks, for your receiving! My TX was on from 08:00 to 12:30UT. Did
you detect my signal?
Lubos, OK2BVG
Date: Fri, 11 Mar 2011 06:52:19 +0000 From: [email protected]To: [email protected]Subject:
Re: LF: OK2BVG_TX_8970 Hi Lubos RX is on this morning
awaiting your test. Good Luck Eddie G3ZJO On
10/03/2011 19:08, Lubos OK2BVG wrote:
Hello Stefan, Markus, Gerhard and all VLF enthusiasts!
I was quite busy during last days, so I am writing just
now.
Well... I tested my new VLF TX set of the day 5th March. It
was the first test only and I am very pleased, you saw my signal. I
expected, it would be poorly visible on the Gerhard´s grabber
only! In fact, it was visible with S/N 10dB.
Some information:
The antenna is my MW Marconi L (24m up), but I increased top load
on the value 220m.
Generator is Wandel/Goltermann PS30, the finest tuning step 1Hz
(OCXO).
PA is Seba Dynatronic 25W out.
My loading coil is made from 60l barrel, it contains two fixed
coils 500 + 500 turns of wire 0,4CuL + rotary coil made from
5litre bucket.
I am going to take some photos and give them on my websides at
the weekend. I will let you know, they are there.
My next VLF test will be tomorrow (2011-03-11):
I will start transmission on 8970 tomorrow morning at
08:00UT.
Than I won´t be at home, so TX will transmit to approximately
12:00UT. It is the best time for VLF TX test, becouse the noise would
be the lowest. Thanks for your encouraging words and
help! 73! Lubos
Date: Wed, 9 Mar 2011 18:23:59 +0100 From: [email protected]To:
[email protected]Subject:
Re: VLF: OK2BVG signal in Todmorden Wow, the next one!
Lubos, can you tell us about your station? All parameters and data
please :-) How strong have you been visible at
OE3GHB? Welcome in the VLF TX group ;-) 73,
Stefan/DK7FC Am 09.03.2011 10:49, schrieb Markus Vester:
Dear Lubos, LF,
beneath is a posting
from Paul Nicholson in the Yahoo VLF groop. His spectrum from
last Saturday morning shows three amateur signals, including
yours.
Very good!
73, Markus
________________________________
Re: [VLF_Group] Re: DF6NM on
8970.00
Thanks for the info
Markus.
> I do not know whether that was really a
transmission
> from Lubos, or a local pretest from
Gerhard.
Yes, that long dash was Lubos.
OK2BVG was active
that morning for a couple of hours.
I get this spectrum,
(08:00-09:00, 278uHz bins)
http://abelian.org/vlf/tmp/110308b.gif
which
has a small peak at 8970Hz - 3.0mHz, bearing east.
To bring
this out I found the best S/N at bearing 110 and
I synthesised a
unidirectional cardioid by combining H and E fields.
Only 3.6
sigma unfortunately.
Hopefully Lubos will do further tests.
He should be visible
here with 30uW at 1423km if the tx frequency
is stable enough.
--
Paul Nicholson
--
|
Re: [VLF_Group] Re:
DF6NM on 8970.00
Thanks for the
info Markus. > I do not know whether that was really
a transmission > from Lubos, or a local pretest from
Gerhard. Yes, that long dash was Lubos. OK2BVG was
active that morning for a couple of hours. I get this
spectrum, (08:00-09:00, 278uHz bins) http://abelian.org/vlf/tmp/110308b.gifwhich
has a small peak at 8970Hz - 3.0mHz, bearing east. To
bring this out I found the best S/N at bearing 110 and I
synthesised a unidirectional cardioid by combining H and E
fields. Only 3.6 sigma unfortunately. Hopefully
Lubos will do further tests. He should be visible here with
30uW at 1423km if the tx frequency is stable
enough. -- Paul
Nicholson -- |
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