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Date: Sat, 09 Jun 2012 10:53:19 +0200
From: pa3abk <pa3abk@kpnmail.nl>
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References: <CAHAQVWPELGnAZKqF3T7AaYo7pgd4GCTZO-L5iTCU3p3vYM+AEw@mail.gmail.com> <00ad01cd424c$0138a690$0401a8c0@xphd97xgq27nyf> <F17EE8B7-0493-4C2F-890F-DD9117273D9E@gmail.com> <00d301cd4255$b6428ac0$0401a8c0@xphd97xgq27nyf> <636F5742-6949-4616-9CFD-3FCF99B4506A@gmail.com> <00f301cd4263$4ce62880$0401a8c0@xphd97xgq27nyf> <4FCCD78A.6030302@iup.uni-heidelberg.de> <Pine.LNX.4.64.1206062141580.31712@plato.ucs.mun.ca> <4FD08634.8010402@iup.uni-heidelberg.de> <4FD0EB97.5010208@kpnmail.nl> <4FD1146A.4050602@iup.uni-heidelberg.de>
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Subject: Re: LF: VX9MRC 504.1 kHz
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Stefan,
Yep, been R/O for 15yrs.

About the PY/EU QSO to make things worse :-)
In the 80's PCH  (Scheveningenradio) had limited MF TOR-channels, as an 
experiment they opened a duplex 425/512kHz TOR channel.
At that time I was working on a "offshore construction vessel" in Campos 
bay. One evening 500kHz was again filled with EU noise.
As an experiment I started up the STB75 (TOR system) had a beautiful 
link no phasing errors. Cleared a lot of traffic on that channel.
Mostly these condition repeats itself a couple consecutive days and last 
several hours.
TX power about 800W into a DUK, which is a fattened vertical 16m. Sea is 
very favourable for MF.
As I explained the QRN in some areas is extremely high.
This is also one of the reasons PY doesn't carry Navtex on MF, but on 4MHz.

BTW monitoring Navtex is good to see if there is any condition on MF.
I can recommend YAND for this purpose which stores all reception data 
has filters and graphics to see how conditions are
And yes it can also receive Navtex messages.

Singapore, Indonesia is a complete hell of static.
One ever wondered that QSO's could take place before the discovery of 
shortwave.
Just an impression how Dutch tried to by-pass the Marconi monopoly, the 
2400kW VLF sparktransmitter which was constructed in the colony Indonesia.
http://www.cdvandt.org/malabar_pictures.htm
After finishing this project , some "hamradio" made a QSO with only a 
few Watts on shortwave.
The project was a complete waste of money.

Jan/pa3abk





On 7-6-2012 22:51, Stefan Schäfer wrote:
> Hi Jan,
>
> Thanks for the email, most interesting! So i'm really looking forward 
> to such special condx! Do i understand you correctly, you have had a 
> 2-way QSO on 500 kHz with a PY station? Sounds as magic as 50 MHz or so.
> Ah, when i read to the end to your mail it rather sounds as if you 
> have been working as the radio operator on a ship?
> I have an idea: Tell it to me in a loooooooong MF CW QSO, rag chewing 
> as some say... :-)
>
> Also thanks for the IARU link. What i find interesting is the comment 
> from TF2JB. I wonder if TF3HZ knows him? Maybe a good adress to ask 
> for common projects with Iceland below 1 MHz.
>
> 73, Stefan
>
> -- 
> pa3abk<->  dordrecht jo21it