Posts by IK1IYU

Please don't break a mirror, or you will have to face seven years of bad luck!!! (as from an italian proverb)

You can use small pieces of kitchen aluminium foil instead.

Try to contact Sandor, DM4DS.

Hey! I was just asking informations....

I stay very cool and I HAVE ALREDY MADE MY DONATIONS to Evariste since the very beginning of the project.

I don't think to have been rude...I know that Evariste is working on another plutosdr implementation.

So you stay cool, and let me wait a reply from F5OEO or IS0GRB.

Thanks,

73 Piero

What happened to the development?

A week is passed without news and updates.

The site firmware.hackhamradio.com is down.

The "click&tune" for the Minitiouner Pro would be an important step forward...

Thanks,

73 Piero

OK!!! pluto.frm Version 2808 is now working fine on Narrow Band transponder reception also.

Thanks!

SDR Console v3.0.24; this is the waterfall with the latest pluto.frm

Simply patching the previous pluto.frm version is working ok, so I presume the latest pluto.frm is broken somewhere.

There is something wrong in the latest update. Narrow Band reception is compromised.

I was just writing that it looks like you have no TCXO signal and to check for missing C123....

Yes, C123 is on the TCXO signal path. If missing Pluto will not work.

I don't think is a good idea to use a larger cap...I don't know how you made the tcxo mod, may be easier to place an equivalent SMD capacitor on the output of the tcxo board and join it to the missing C123 pad...

BIAS

Have a look in your SPAM folder.

In my case, the R.E.F. office replayed quickly, but the e-mail was in the SPAM folder and I discovered only later.

73 de Piero, IK1IYU

Hello Martin, have you seen this by 4Z1ZV?

QO-100 MiniTiounerPro V2 Case

Piero, IK1IYU

Yes, it is the new version, more recent, but it's always an EDUP AB-003.

73 de Piero, IK1IYU

Yes, it was a very good signal and a pleasure to listen to it...but you should have identified your transmission at least at the beginning and/or the end (something like TEST DE DG9BFC)...HI...

Using FT8 and FT4 you can work on QO-100 with very low power and basic setup, like a PlutoSDR and small amplifier, 100mW and may be less.....like on HF bands.

Oh well, then on HF people is running 100 Watt and more....

I have just found a cold joint on the GPS module, at the green impedance marked "Z".

I had no gps satellites reception (0 satellites).

It turned out I had no bias current to the active antenna.

Now everything works good.

So, if you should have a similar problem, look for cold joints on the module.

73 de Piero, IK1IYU

Personally I think that there is a lot of activity during week-ends, I started activity on QO-100 during summer 2019 only on receive first, assembling components and material for my TX/RX station, then I become fully operational in early october and since then I have noted an increasing number of active stations.

When some "DX" station is on the satellite the pile-ups sometimes are very huge, as we are accustomed to on short waves.

Many are only interested in working new countries and new grids, so they spend most of time listening on the band.

I am one of them, but I like to call CQ and make casual QSO mostly in CW.

I confess that making contacts is the last objective for me...I spent most of the time making new project and modifications, adjustement on my station and antenna, trying to optimize the performance of my system.

Don't forget the activity on the WB transponder in DATV, many new stations active...myself working on assembling the TX section.

All UMTS amplifiers on EBAY goes out very fast, every time they appears....

I think that during the springtime and summer we will see a lot of portable stations, new grid activations and rare DXCC countries.

Than the passion and knowledge are a big filter. Working on satellite and microwaves is not easy as put up a wire and a commercial transceiver on HF...and that's the way it's going to stay.

73 de Piero, IK1IYU

DM5RM Thank you very much Roland, for fast developing the idea into a practical and working design.

I wonder if the 1:4 transformer is really necessary or his presence could cause the blocking under 20 MHz.

However…..nice job!

73 de Piero, IK1IYU

Looks like the easiest pluto sdr tcxo removal….is NOT removing it at all.

According to Analog Device Pluto schematics, pin 1 of the tcxo is an Enable/Disable pin and simply grounding it should disable it.

And this is the modification by F4DAV to inject an external reference frequency into XTALN pin through additional decoupling capacitor, and original tcxo pin 1 grounded:

73 de Piero, IK1IYU

How to receive QO-100 DATV BEACON A71A on V8FINDER iBRAVEBOX and other clones. VIDEO

https://drive.google.com/open?…K_yH63TmPlnP3bKz1cuPKnrU1