Re: LF: OK2BVG_TX_8970

[Roger Lapthorn <rogerlapthorn@gmail.com>]

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)

On 11 Mar 2011, at 19:32, "mal hamilton" <g3kevmal@talktalk.net> wrote:

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 -----

From: Stefan Schäfer

To: rsgb_lf_group@blacksheep.org

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: qrss@talktalk.net
To: rsgb_lf_group@blacksheep.org
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: Stefan.Schaefer@iup.uni-heidelberg.de
To: rsgb_lf_group@blacksheep.org
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

Tue Mar 8, 2011 11:54 pm

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.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 --

=