From: Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Thread-Topic: LF: Titanic Frequency
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Date: Sun, 15 Apr 2012 17:16:18 +0000
Message-ID: <7E7DFBB4D102A04DB5ADC88D66628A4A02788C02@ICTS-S-MBX5.luna.kuleuven.be>
References: <20120415104118.xw4cii7ibk00ow0o@webmail.senselan.ch>
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Jan, all,

have a look at http://www.hf.ro/

73, Rik  ON7YD - OR7T
________________________________________
Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org=
] namens pa3abk [pa3abk@kpnmail.nl]
Verzonden: zondag 15 april 2012 11:49
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: Titanic Frequency

Nice question.
My friend Google couldn't produce an instant answer.
What I know is that they used to have two frequency bands in use: 300m &
600m.

Knowing that the MGY was a modern vessel assume he had both and he
certainly should have produced his CQD on all frequencies available.

http://marconigraph.com/titanic/wireless/mgy_wireless.html

As Andy pointed out, sparktransmitters do have wideband, when  a couple
of stations were in the air the spectra was well occupied.

There was also a certain "isolation" between Marconi and non-Marconi
stations, which they didn't improve the initial contacts and QSP.

The 600m came official alive after the disaster.

BTW The company I work for, still has of a wirelesstation in the
showroom from those days (1916).
A Telefunken spark transmitter working on both 300m & 600m.
It's quite an eye catcher between all the modern stuff and a good
marketing tool :-)

Jan/pa3abk


On 15-4-2012 10:52, Andy Talbot wrote:
> It was using spark wasn't it ?
> So an early spread spectrum transmission
>
> Centre frequency based on antenna resonance ?
>
> 'jnt
>
>
> On 15 April 2012 08:41,<traumwandler@sensemail.ch>  wrote:
>> Does anybody know, on which frequency the titanic sent the SOS? Was it r=
eally
>> 500kc/s?
>> 73 de Toni, HB9ASB
>>
>>
>


--
pa3abk<->  dordrecht jo21it=