Posts by DB8TF

It is not so EH2 related but i also own a water cooled amplifier.

Its from an old Coherent DEOS Lasersystem, delivers easily 1,2KW on VHF.

Supply voltage is 48V so not usable as "portable" amp, not to forget the needed chiller.

1K2 looks much on VHF but compared to the bigger Laser RFPSUs (E1000) with >10KW at my QRL this is a tiny amp

I only fired it up once on a dummy load, because neither my coaxcable or antenna can handle this much power.

Vy73s DB8TF

See here for active transmissions and frequencies: https://eshail.batc.org.uk/wb/

You are on the NB Transponder

Try about 6MHz higher ..

The whole QO100 project is only so good because of the work from so many OMs.

Some share their experience in programming SW others are designing and building feeds, and the guys which are trying to modify LNBs and sharing their experiences are also very helpful.

Amsat-DL has surely done the most work i think.

And a lot more OMs are working and experimenting to help this great project getting better and better.

Hi Heiner,

i must admit i haven't tested SDR-Radio with the driftcorrection till now

My "old" setup with 2 PCs/Sticks works to good...

I am glad that unless other things relating EH2 the drift correction is free for everybody and no one has to pay for its use. Thanks to Simon.

True Ham Spirit here.

Because i have not found the link in this forum to the SDR-Radio forum where the discussion about the Software Drift Correction started:

https://sdr-radio.groups.io/g/…7993?p=Created,,,20,1,0,0

Many weeks prior to officially opening of the HAM transponders

Now with SDR-Radio V3.07 we have it.

vy73 DB8TF

10W into this 24dBi Wifi Grid Dish thingy

OK, i send a few minutes a FreeDV signal on 650.

A few days ago i had a successful QSO with an austrian OM.

The DV signal is much smaller (1,2kHz) than the allowed 2,7kHz, so no problem on NBTP.

If you want to do a test then install the SW and let me know.

vy73 DB8TF

Easypal? > https://www.sigidwiki.com/wiki/WinDRM (3 stronger peaks left IN the digital signal visible!) https://www.sigidwiki.com/images/f/f3/Digital_sstvimg.jpg

FreeDV? > https://www.sigidwiki.com/wiki/FreeDV_COHPSK (2 peaks in the middle of the digital Signal visible)

Both modes are used from time to time on QO100 NBTP

KG-STV (digital SSTV) from (mostly) an italian station.. IDY?

Just discussed in the shoutbox a few hours (<24) ago..

Tnx @ DL3DCW, those infos are really new.

Maybe i wait a little longer before i buy such an receiver

Has someone already tested this receiver for EH2 WB RX?

Time for ECCM

Hello Armin,

Maybe you could improve your project by adding to the description that:

- A single cable solution with ext TCXO is possible > search for OH2AUE mod (works good!)

- As many others you don't mention the SW Drift correction in the possible stabilization methods. > SDR-Radio V3.07 (and some others)

- See DG0OPKs HP, there he already described 2017 that the FOX TCXOs are not usable because of their digital control style. > F75D TCXO

- A adjustable output level would be a good idea, some LNBs only lock with a much smaller ref Input level (50mVpp) > HD Line BP2

73s

Quote from HB9RYZ

Hi All

Interesting to see these PDF-slides

https://www.worldspaceriskforu…loads/2012/03/35TORU1.pdf

In the old OSCAR-10 time, almost everything (block-diagram, pictures, etc.) about this satellite was public. I understand in these days that you have to protect the IP and that you haved signed a NDA. Especially it is not just an amateurradio satellite it is a commercial satellite with amateurradio payload.

But still, it would be very interesting to see the antennas of our amateurradio transponder and to see a little bit more of the nice satellite.

73 de HB9RYZ

Wolfgang

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HB9RYZ, why are you again posting links i already postet?

In the same thread, only a few entries ago.

> photo of the QO-100/Es'hail satellite

Just on friday.

After stabilization with a 78l05 about 3V. Never measured it because the IDS is the value you want to adjust

Link posted already weeks ago: PSK-Telemetrie decodieren

Works fine

Could be a RT320M , common PLL/Mixer for 2 port LNBs with 25MHz

Quote from db6qs

Hello,

if it helps to find an LNB, I'm using a Megasat Diavolo Twin, which is still available from: https://www.reichelt.de/lnb-tw…volo-twin-p74259.html?r=1

73 de Achim

Maybe you could give some more information?

Is the LNB wobbling?

What PLL/Mixer IC?

Xtal freq?

Pictures from the PCB?

vy73