Welcome to the world of HB9GFX / DG9BDI

About Me

My name ist Stefan and I am born 1964 in Melle - Lower Saxony in the Northwest of Germany.

I am a passionated Radio Amateur and RV Camper.

I am licenced since 1990 in Germany as DG9BDI

Since 2016 I live in Döttingen/Switzerland and I am licenced as HB9GFX.

My Maidenhead Locator is "JN47DN"

I am married to Heike since 1994.

I have 2 more or less adult children. Jessica, born in 1995 and Julian, born in 1998.

I am a certified IT Project Manager. I love to play with data and create prototypes to later use in productive environments.

Beside the "real" Amateur Radio, I run the XLX508 Digital Amateur Radio Gateway to connect the world together.

Below you can read about my history activities and what I am doing today

Amateur Radio

I started in 1975 on CB Radio with a hand held radio "Weston HF1000" which is equal to the "DNT HF12" influenced by a friend who used the same radio for scout activities.

After several years doing CB Radio with different setups I met a friend who asked me to do my Amateur Radio licence.

So I made my Amateur Radio Licence in 1990 and began on 2m-VHF (144Mhz) and 70cm-UHF (432Mhz) with my activities.

I started using an "Icom IC-260" and later I changed my equipment more often, to be up to date and because of changing focus on activities

Also I did Satellite operations on AO-13 and followed the launch of Amsat-Oscar-40 which never realy worked due to a problem with the engine which burned something on the satellite.

Therefore I was realy dissappointed and focused back on VUSHF.

After the 6m band was opened by law to every Radio Amateur in Germany I started to have my focus on 50Mhz, the Magic Band.

I had different radio and antenna setups in these years from 1990 until 2011

This was one of my antenna setups during this time


At least I operated from home with 6 Element "Create CL6DX" for 6m.

For 2m I had a 16 Elm. Tonna Yagi with 15 dBd gain.

For 70cm I had 4x 11 Elm. with 18dBd gain (home made).

For 23cm I had 2x 48 Elm. Yagi FX 2317 Flexa Yagi with 21,5 dBd gain.

For 13cm I had a 60Elm Yagi home made.

For the short wave bands I had a Multiband dipole G5RV (80-10m).

All was mounted on a 12m Versa Tower which was mounted sidewards to my house with a wallmount.

As transceiver I used at least an Icom IC-275H for 2m an Icom IC-475E for 70cm and for 6m and SW I had a Yaesu Yaesu FT-920.

On 23cm I used an Icom IC-7000 with SSB Electronic SSB Electronic LT230S.

For 13cm I used the same IC-7000 with a Transverter LT13S and Transistor Amplifier with 30Watts out.

I had a 400W Tube Amplifier (Homemade) with 1x 4CX300 for 2m, a 250W Tube Amplifier with 1x 4CX250 (Homemade), for the SW bands a 500W Tube Amplifier with 4x GU50 and for 23cm I had a tube amplifier with 2x 2C39 about 200W out.

I was very active on the 6m (50Mhz) band and also worked many stations on the VUSHF Bands.

This was my shack somewhere in 2004 or 2005


In 2011 we deceided to move to South Germany and later to Switzerland because my employer made a nice offer for a new job position in Zurich.

In South Germany I had no chance to build up any antennas so I sold most of my equipment which I used before.

Because I wanted not to give up my hobby completely and because I met some people doing contesting I joined the Contest Station DR5T and bought an Icom IC-9100 full equipped with all Filters, DStar and 23cm module to use it during the contests with DR5T.

So I came to DStar first and after I learned how Dstar works I found an old Radio Amateur Friend Rolf - DG9YIB who influenced me realy on digital modes.

So the full "Digital Story" began.

After the movement to Switzerland there was a small chance to build up some antennas so now I have a Comet GP92 for 2m/70cm/23cm. Better that then nothing.

For 6m I have a Diamond V2000.

For SW I still have my G5RV for 80-10m which is still doing a nice job and an 17m long Endfeed antenna for 160-6m which is a bit more silent then the G5RV.

In the meantime I sold the IC9100.

Equipment now:

  • Icom IC-7300 Short Wave Allmode TRX
  • Icom IC-9700 VHF-UHF-SHF Allmode TRX with DStar to use with Groundstation
  • DXPatrol Groundstation for Es’hail-2 / AMSAT Phase 4-A / Qatar-OSCAR 100, see also my blog for it.
  • Icom IC-9100 HF-VHF-UHF-SHF Allmode TRX with DStar
  • Icom ID-4100 DStar TRX
  • Icom ID-5100 VHF-UHF FM TRX with DStar
  • Icom ID-52E UHF FM portable TRX with DStar
  • Icom ID-50E UHF FM portable TRX with DStar
  • Anytone AT868UV VHF-UHF portable FM TRX with DMR which is converted to an Anytone AT878UV
  • Yaesu FT70D VHF-UHF FM TRX with C4FM
  • Retevis RA-79 VHF-UHF FM TRX
  • Baofeng DM-1701 DMR portable
  • Mein "Oldi" aus reiner Nostalgie: 😜 Sommerkamp TS-280FM
  • Drake MN2700 2KW manual Antenna Tuner
  • For all digital modes I have several MMDVM Hotspots based on DF2ET MMDVM Boards with Rasperry Pi 3 and a Jumbo Spot from China.

  • The Monster with 2x GK71

    It has more then 1KW out.

    It is homemade by DJ1QQ



    Here now ready with new paint and new labeling.

    On the picture above you can see the 30kg "monster" which deliveres all in all around 1kW out at 100W in on all SW bands.

    On 80m --> 3.6Mhz about 1100 Watts until 10m --> 28Mhz about 700 Watts out , this is more then enough power also with my not optimal G5RV and my Endfeed antenna to speak to world wide contacts.

    This is my todays tiny shack:


    Because I am also interested in computing and all around data as an IT Product/Project Manager I started to build up a DMR+ Gateway.

    Later due to changing our activities to the Brandmeister Network it was not needed any more so I started to build up the XLX508 Multimode Gateway and the YSF26446 C4FM Gateway.

    Since it is running fine and all works like I expect, I have a bit free time to do other things beside my Amateur Radio Hobby.

    My son and me, we are building small devices which can be used to create a conneted home.

    Right now we can read out and drive/configure our "air condition", we can read the pool temperature as well as the bathroom temperature and humidty plus the won data we use to drive the air condition to get out the "wet" air from the bathroom as example after having a shower.

    We can drive several lights, our 3D Printer and our heating via voice and mobil phone from inside and outside the house.

    Development is onging and will be presented here when we have all "homework" of our concept done.

    Actual Activities

    I am not able to built up a big antenna farm here and due to the limitations, I am doing alot of "FT8" from this QTH.

    I prefer to use 80m, 40m and 6m operation.

    80m and 40m is more or less working every day at every time.

    6m I am monitoring and as soon as there is some interesting activity, I am also working there.

    Equipment is the IC-7300 and IC-9100 with barefoot power and my G5RW as well as my V2000 for 6m.

    I use JTDX as main software connected to JTAlert and HRD to make it as comfortable as possible.

    I use the HRD Logbook connected to HRDLog.net to QRZ.com and EQSL.cc.

    This is my screen arrangement:

    More to come....

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    HB9GFX Logbook


    ODX on 60m with G5RV is VE1YX with 5438.6 km in FT8 with 50W

    ODX on 40m with G5RV is ZL3IO with 18761.5 km in FT8 with 100W

    ODX on 30m with G5RV is VK7AP with 16787.7 km in FT8 with 100W

    ODX on 20m with G5RV is VK7NET with 16653.2 km in FT8 with 100W

    ODX on 6m with V2000 vertical is VO1HP with 4452.6 km in FT8 with 100W

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    RV Camping

    We have our own RV (camper) since 2012.

    As often as possible we do weekend trips in a radius of about 250km around our home.

    We realy like the area around the Lago Maggiore, and the village of Cannobio.

    In our holiday seasons we travel quite often to Italy to the Adria Area.

    Our longest trip was Ireland.


    Most of the "extras" I built into the camper by myself.

    We have an inverter for 220V with 3000Watts output so we can run our coffee mashine without land electricity and all the other stuff runs on 12V or on Propane Gas.

    Also we have a solar panel which gives us back most of the power we used if we are a bit careful with the consume of the battery power.

    We are quite well equipped and we can stay complete "autark" for about a week until we need to pick up some fresh water and until we have to dispose of the gray water.

    We have a real shower in the RV with a real door to not flood the hole bathroom as well as a 120 liters cooler and a 40 liters icebox. Enough space to store fresh food and drinks for some days.

    If there is no space on a RV parking space we can survive also "wilde".

    In many cases we navigate to small cheap RV parkings close to the sea. We already found some nice places direct to the Adria beach like here: Fossacesia, Abruzzo. We realy love this place and will go there again as soon as we will go this direction.

    We realy like this place, not luxuary but all what is needed is there and very cheap. 12€ per 24h including electricity as much as you need. Sometimes the electricity wiring is a bit adventurous but it worked all the time.

    more to come...

    Camper Setup:

  • Icom ID-5100 dashmounted HB9GFX-8 on APRS-fi last postion send by latest DStar activity.
  • Bosch KF163 with APRS Tracker HB9GFX-9 on APRS-fi Sending position every time position changed.
  • Antenna Camper: Diamond: SG-M911 for 2m and 70cm activity from ID-5100
  • Antenna Camper APRS: Diamond CR-77
  • Raspberry Pi 3 with DVMega Hotspot for DStar on XLX508J
  • Raspberry Pi 3 with MMDVM Dual Hotspot (DF2ET) for DMR on TG26446 BM and TG26447 BM and C4FM on YSF26446
  • Raspberry Pi 4 with NoELEC SDR as mobile I-Gate for APRS - HB9GFX-15 but no GPS so always QTH at home shown.


    73 de HB9GFX/DG9BDI Stefan

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  • Solar-Terrestrial Data

    Weather in Döttingen

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