Re: LF: Re: DI2AT 505.145KHz on the air

[Roland Bruestle <r@mbsks.franken.de>]

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/