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DL8MFU Germany flag Germany

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Platinum Subscriber Lookups: 6625



Born in 1972, i´m a Radio Amateur since 1988.

My first Callsign was DG8MFN (former Class C, no HF, no CW, only 75W PEP) , then DH0MBJ (former Class A).

Since December 1990: DL8MFU
Additionally i registered a "Training-Call", so since February 2nd 2015 i also hold DN1MFU.

Also since April 20th 2016 KG5MZT and Maintainer of HAMNET Site DM0VK in Vierkirchen /Obb.

My DOK is C18.

My main interests are: Shortwave, 6 and 4 meters, 23 cm, SDR-Technology, ADS-B, Hamnet and Radio Direction Finding.

QSL Policy:

I still prefer Paper QSL but i also upload all QSOs to eQSL.cc, QRZ.com and LoTW.
Paper QSLs will be sent via bureau. Direct QSLs will be answered direct. This service is for free! You don´t need to send me IRCs, USD or Paypal!



On Feb 22 2016, my daughter Franziska successfully reached her Class E License DO2FH. Mni Congrats!



My current Shack-Setup is listed here:



  • Yaesu FT-757 GX Mobile Transceiver (Shortwave)

  • FLEX 5000 SDR (Shortwave and 6 Meters)
    FLEX 5000

Power Output of each is 100 W PEP - no QRO smiley



  • Yaesu VX8D Portable for mobile Operation in my car
  • ICOM IC2E Portable (2m)
  • ICOM IC4E Portable (70cm)
  • ICOM IC-T81E Triband Portable (2m, 70cm, 23cm)
  • ICOM IC7100 (4m, 2m 70cm)
  • Rohde & Schwarz SU451 (VHF 50 W Transmitter)


  • Rohde & Schwarz Communications Receiver EK070

  • Rohde & Schwarz Communications Receiver EK47 (A really great Machine!)
  • Rohde & Schwarz Receiving System ET001
  • Rohde & Schwarz Doppler Direction Finder PA022 (100-163 MHz / 225-399 MHz)
  • Rohde & Schwarz Doppler Direction Finder PA555 (10-999 MHz)
  • 2 x Rohde & Schwarz ESM500B Communications Receiver
  • FunCube Dongle Pro+ SDR
  • RTL8132 SDR Stick on Bananian Pi as SDR Server for ADS-B Reception with dump1090
  • HackRF PRO SDR (10MHz - 6GHz)


  • Rohde & Schwarz FSK Analyzer GA082
  • Rohde & Schwarz Azimuth Analyzer PV017
  • Rohde & Schwarz Spectrum Monitor EZM
  • Rohde & Schwarz Process Controller PCA5
  • a lot of RasPi Hardware

Measurement Equipment:

  • Rohde & Schwarz Spectrum Analyzer FSAS
  • ... and the usual lab stuff .....


HF (40-10m):

  • Rotable I3VHF-Baby-Loop placed in 12m height (2012) Additionally 2-El. for 50MHz (Diamond A-502HBR 2015) Discone Diamond D-3000N, Tri-Band Vertical Diamond VX4000, 10 El. Yagi for 23 cm (03/2015): Discone Diamond D-3000N, Tri-Band Vertical Diamond VX4000, 10 El. Yagi for 23 cm, Log Periodic 6m / 4m, Log Periodic 2m / 70cm / 23cm, 24 dbi Reflector Grid Antenna for HAMNET Access (07/2015):

VHF / UHF (6m - 23cm):

  • Diamond D3000 N Discone Antenna (25 MHz - 3000 MHz)
  • Diamond A-502HBR (6m horizontal 2 el Beam)
  • AnJo LP045073 for DX (Log Periodic 6m / 4m horizontal polarized)
  • Diamond VX4000 (2m / 70cm / 23cm vertical polarized)
  • AnJo LP1351G3S (Log Periodic 2m / 70cm / 23cm horizontal polarized)


  • Microphone: HEIL PR-781
  • Audio Optimization: Behringer UltraCurve PRO / Behringer UltraLink PRO / Behringer SHARK DSP110
  • For optimized working with PowerSDR, WinTest, HRD Log and SDR Radio i prefer DELL U3014 screens:

Some spare parts with no specific use case (at the moment)

Feel free to send me a mail if you´re interested in these devices:

  • Teleport 10/80-4 (4 pieces including charger and spare battery)
  • FuG7b (2 RIGs including AC Power Supply)

Other Gimmicks:

  • Raspberry PI Farm (6PIs):
  • 6 RTL-SDR-DVB-T Sticks working on a dedicated Raspberry-PI 3:

    • acarsdec together with splunk> visualization
    • VHF Data Link 2 analysis - also with splunk>
    • POCSAG Decoder
    • SDR-TCP-Streaming
    • APRS iGate
    • ADS-B with dump1090 streaming to VirtualRadar. The RX diameter encompasses about 400 km.
      In The BackEnd for Long-Time Storage and historical searches i prefer the free Version of splunk>:
      Virtual Radar Picture around Airport EDDM (Munich) Long Time ADS-B Analysis with splunk>

    • ADS-B with Radarcape - an ultracool FPGA-based ADS-B / Mode-S Receiver from jetvision streaming nearly 5 Gigabytes Flightdata per Day.
      Powered by splunk> you can see a lot of curiosities in the world of aviation e.g.:

    • Dreamteam: ADS-B Antenna next to Diamonds VX4000
  • Inmarsat-C Receiver
  • DX Cluster Analysis with splunk>
    Doing long-time DX Cluster Analysis with Callsign ./. TX-Frequency Prediction together with Callsign alerting:


HAMNET Activities:

operating three User-Access Links:

  • HAMNET User-Access via DB0HHB:
    Running a HAMNET-Link between DL8MFU/p and DB0HHB on 6cm (Distance > 7 kilometers):

    Signal Strength about -70dBm:

  • HAMNET User-Access via DL8MFU-101:
    1,3km distance on 5200 MHz
  • HAMNET User-Access via DB0DAH:
    The distance between my QTH and the HAMNET Gateway DB0DAH is almost 15 kilometers (Thanks to ham.remote-area.net):

    S/N is about 27dB, Signal Strength -66 - -85dB:

    My permanent HAMNET-IP is
  • VoIP:
  • This is here my latest Setup: Do VoIP with my FRITZ!Box and a CISCO-Phone over HAMNET:

    Very awful!
    In future you can use the Phone-Number 315380613382 (aka DL8MFU - see: https://www.oe2wnl.at/calltodtmf-voip.php ) to reach me directly in my shack. It´s also good for skedding a QSO  yes.
  • Running an OpenNMS Monitoring Instance for monitoring selected HAMNET Nodes and Services:
  • Maintaining HAMNET-Node DM0VK Vierkirchen Wasserturm (48.36268 N, 11.4621 E) :
    Setup of a new HAMNET-Backbone-Location with 5GHz Links to DB0DAH (16 kilometers) and DB0VM (23 kilometers) is currently in progress - Also the new Home of the ATV repeater DB0QI
    User Access currently on ISM QRG: 5520 MHz with SSID: HAMNET ISM
    Please ask for WPA2 Key and further settings via E-Mail.
    For more Information visit HamnetDB


  • HamserverPi:
    Productive now - visit http://hamserverpi.dm0vk.as64625.de.ampr.org/

  • HAMNET Meeting Grandsberg 2016:
    Here´s my presentation about "Network- and Application-Monitoring with OpenNMS" i held at the HAMNET-Meeting 2016 in Grandsberg:
  • HAMNET Tagung Stuttgart 2017:
    Same Title different content: - HAMNET-Tagung Stuttgart

    Slides are only available over HAMNET!



My confirmed countries

As you can see, my special interest is Radio Direction Finding. Therefore i use a stationary Doppler Direction Finder from Germany´s No. 1 Direction-Finding-Company "Rohde & Schwarz" named PA555:

I wrote a special Application to visualize all Bearing Parameters in a georeferenced Map based on MapWindows:

If you`re interested in this solution, then drop me a mail.





I like to visit really "big guns". Here are some pictures of my former excursions:


Wendelstein (FM and TV Transmitters):


Ismaning (MW Transmitter 801kHz QRT since October 2015)


Stuttgart Television Tower (not accessible anymore)


Rundfunksendestelle Wertachtal (QRT)

"Rundfunksendestelle Wertachtal"

(N 48.086849, E 10.694537)

From a bird´s eye it looks like a trident star with longitudinal extensions of 1000m, 1300m and 1900m

In Service between June 12th 1972 and March 2013

Connected load of the entire TX Site: 20 MVA / 110kV In

TX Frequencies between 5.9 and 26.5 MHz
12 Transmitters with each 500 kW Output (AM)
Used PA Valves: 2 x YL490 m

Cooling System: Air flow rate: 150 m³ / minute

Antenna Gain: 20dB each (40MW ERP!)
Antenna Selector: 12 in 76 out (LxBxH: 26m x 1 m x 12m)
Antenna Azimuth: 0° - 360°

74 Antennas on 25 Antenna Towers between 26 and 123m height

53km of RF cable have been installed - Cable Loss amounts to 0.078 db/100m

Maximum VSWR (Antenna Input): 1:1.7 (at 150 Ohms)

Hoher Bogen (former SIGINT Site)


added by DK8NC

73 + 55


Started in 1986 as a SWL. Here are some of my early QSL-Cards of Radio Stations around the world. Some of them are QRT now:


Radio Sofia - Bulgaria


Stimme der DDR (Voice of the German Democratic Republic)


Radio Nacional Do Brasil


Radio Kiev (former USSR)


Deutsche Welle (Federal Republic of Germany)


A letter of Radio Moscow dated on April 10th 1987


My DX-Club membership Card from Radio Moscow:



QSL Card from VOA (Voice of America) in 1987 - The Skyline of New York:

Then in 1987 i started to learn for the Radio Amateur Exam Former Class C. This here was my firs QSL-Card:



On December 20th 1988 i had my very first QSO with DJ4OP (sk) - my Mentor - without him i would never got in touch with HAM Radio. Thank you Werner!

And here are some early QSLs back from the late 1980s and early 1990s:

Y24SK (former German Democratic Republic)






The QSL card of my employer from the early 1990s:



OK1VTF from former Czechoslovakia



And finally some newer (and more exotic) QSLs:












.... and everything started in 1972 with this SABA Konstanz:

This Radio still exists!


8374776 Last modified: 2017-10-07 21:00:59, 37096 bytes

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Public Logbook data is temporarily not available for this user
World Continents Award#13749
Granted: 2016-05-26 20:05:02   (DL8MFU)

Grid Squared Award#10299
Granted: 2016-01-07 23:10:02   (DL8MFU)

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