Message-ID: <4803C5D3.7090504@mbsks.franken.de>
Date: Mon, 14 Apr 2008 23:00:03 +0200
From: Roland Bruestle <r@mbsks.franken.de>
User-Agent: Thunderbird 2.0.0.9 (Windows/20071031)
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <904323.24159.qm@web63605.mail.re1.yahoo.com> <47FE47AD.7010100@mbsks.franken.de> <728195058.1208132304.168379540.43837@mcgi39.rambler.ru> <48031FD3.8060307@mbsks.franken.de> <909043430.1208192629.170659884.48988@mcgi41.rambler.ru>
In-Reply-To: <909043430.1208192629.170659884.48988@mcgi41.rambler.ru>
Subject: Re: LF: Re: DI2AT 505.145KHz on the air
Content-Type: text/plain; charset=windows-1251; format=flowed
Content-Transfer-Encoding: 8bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org


Hello Roman
I will tell a little bit about my beacon.
The PA is a converted CB-PA with 80/150W and 28MHz.
I had to change all the filters to 505Khz. Now it has 70-80W as linear 
amplifier.
Than was a Software Defined Transmitter SDT added. It was a kit of 
SoftRock RX/TXv6.6 for 160m (about 30€).
I had to change the filters to 505kHz. This SDT has a small PA with 1W. 
But you can easily get more than 2W.
The SDT has a single Quartz  4MHZ. This gives me a center frqeuency of 
500kHz for RX and TX.
The Frequency range is twice of the sound card band width. That means in 
my case 480-520kHz.
The input into the SDR is a I/Q-Signal with the freqeuency of 505.145kHz 
-500kHz = 5.145kHz.
How do I come to this signal?
To create the modulated signal I am using Spectrum Lab with a center 
frequency set to 1000Hz.
Spectrum Lab can all the modes I am transmitting till now. With other 
programs I could use modes like Wolf.
But in Germany we are limited to 505 to 505.2 kHz = 200Hz band width for 
6 beacons.
Therefore Wolf needs to much frequency.
Now back.
We have got a modulated signal for one mode. With the audio editor you 
can put together several modes to series.
This audio signal has to be converted with MOKGK (RX_TX_kgksdr11.exe) to 
a I/Q-signal with this necessary 5.145kHz.
The right signal for the SDR on the frequency of DI2AT.
You can send it directly via sound card to SDT or what I am doing I am 
storing the audio signal into a SD-Disk and use it with a MP3-Player.
That means I need a MP3-Player, SDT and a PA for the beacon during 
transmitting. Nothing more, no computer.
Uff!
The horizontal part of the antenna is pointing to south/ west. That 
means the max. gain shows directly  to  Moscow.

Roman let me now if you have some additional questions.

Good luck
Roland DI2AT/DL3NDR



Roman RW3ADB schrieb:
> Hi Roland!
>
> * Roland Bruestle <r@mbsks.franken.de> [Mon, 14 Apr 2008 11:11:47 +0200]:
>> Hello Roman
>> thank you for the really surprising report.
>> The world is sometimes full of, I hope only good, surprises.
>
> I hope all next surprises will be good.-)
> Now I know I was copy your trace here so often.
> It was a first time when I copy a readable signal DI2AT here.
> I copy only line before that.Because it I was not sure.
>
> You are forestall my questions!)
> I'm so very interesting whats TX are you use for too match modes at once?
>
>> Beacon parameters:
>> Call: DI2AT
>> Operator: Roland DL3NDR
>> QTH: Neunkirchen a. B. / Nu"rnberg
>> Locater: JN59NO
>> TX: Software Defined Transmitter of SoftRock
>> Software: Spectrum Lab, MULIPSK, MixW, Audio Editor, Audio player
>> PA: CB-PA, adapted to 500kHz ; 70W
>
> What is a amp mode are you use for that?
> AB class?
> What is a model of CB-PA you are adapted to 500 kHz?
> Is it possible to look fotos of your equipment?
>
>> Antenna: inverted L, 50m, 10m high; 1W ERP
>
> Not so high.I suppose that.
> In my observations I'm copy well the signals of the stations with 
> antennas 25-30 m's high here.
> Tell me pse how is oriented your inv-L?
>
>> Perhaps you can sometimes receive another modes.
>
> I hope-)
>
>
> 73!
> Roman
>
>> Best wishes
>> Roland DI2AT/DL3NDR
>>
>> Roman RW3ADB schrieb:
>> > Hi Roland & LF!
>> >
>> > The day full of surprises today!
>> > I copy trace of DI2AT readable some times in Moscow.
>> > http://qrss.nm.ru/14apr2008_DI2AM_DI2AT/505.1_3_0001.jpg
>> > http://qrss.nm.ru/14apr2008_DI2AM_DI2AT/505.1_3_0002.jpg
>> > http://qrss.nm.ru/14apr2008_DI2AM_DI2AT/505.1_3_0005.jpg
>> >
>> > 73!
>> > Roman
>> >
>> >
>> > * Roland Bruestle <r@mbsks.franken.de> [Thu, 10 Apr 2008 19:00:29
>> +0200]:
>> >> Hello Andy
>> >> sorry, thank you for the report. It was to expect but it is 
> although
>> >> disappointing.
>> >> Did you ever receive DI2AM. His power is at least 10 times as 
> much.as
>> > my
>> >> beacon.
>> >> Good DX and let's try next winter.
>> >> 73 de DI2AT/DL3NDR
>> >>
>> >> KU4XR schrieb:
>> >> > Hello Roland; and all LF-ers:
>> >> >
>> >> > Roland I monitored from 20:00 UTC until 10:30 UTC ( Thurs morn. )
>> on
>> >> 505.145 in QRSS-10 mode.
>> >> > I used ARGO set at maximum weak signal detection, with about a 
> 30Hz
>> >> window, capturing every 30
>> >> > minutes. Unfortunately, all I had were some TV lines. Getting too
>> > late
>> >> in the season now.
>> >> > the static level at 10:00 UTC ( 6 am local time ) in super narrow
>> > mode
>> >> was peaking at 7 to 9dB.
>> >> > That's very high for that early in the morning. Europe will be my
>> >> challenge next winter season.
>> >> >
>> >> > 73 to all, Andy Bell - KU4XR - EM75xr
>> >> >
>> >> > __________________________________________________
>> >> > Do You Yahoo!?
>> >> > Tired of spam? Yahoo! Mail has the best spam protection around
>> >> > http://mail.yahoo.com
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >
>> > --
>> > Roman RW3ADB.
>> >
>> > --
>> > Побег из Москвы - самое дерзкое приключение сезона!
>> > http://pobeg.rambler.ru/
>> >
>> >
>>
>>
>
> -- 
> Roman RW3ADB.
>
> -- 
> Побег из Москвы - самое дерзкое приключение сезона! 
> http://pobeg.rambler.ru/
>
>