Welcome!

My name ist Christopher and I am from Kiel, the capital of Schleswig-Holstein at the coast of the Baltic Sea. Since June 2023, I am a licensed ham radio operator.

The callsign is DO9CK and the (primary) DMR ID is 2631337.
QTH: JO54bi | 54.35° N, 10.16° E | 54°21’00” N, 10°09’36” E

In addition to the primary CCS7 ID for DMR, TETRA, and P25, I also bear the secondary CCS7 ID 2631116 as well as the NXDN ID 7754.

I am interested in portable and mobile radios as well as modern (digital) modes. Therefore my equipment is mainly QRP-like and operates on VHF/UHF:

  • Icom ID-5100E as my mobile VHF/UHF FM transceiver, also for D-Star operation
  • Yaesu FT-818nd as my „Swiss Army Knife“ for HF/VHF/UHF with low power
    → For that a Digirig Mobile (NF and CAT adapter to USB)
  • Radioddity DB25-D (aka Retevis RT73) as DMR mobile transceiver
  • Yaesu FT-5D as my portable, also for YSF (C4FM) operation
  • Two Retevis RT3S as my portables for DMR operation
  • A Baofeng DM-1701 with openGD77 to play with
  • Motorola MTP 850 as my mobile for TETRA
  • Motorola MTH 800 as my mobile for TETRA
  • Some “China Crackers” for tinkering and experiments
  • Personal radio service: 2x PMR446, 2x “Freenet” (VHF in Germany) and 1x CB handheld(s)
  • Komunika GP-Mini-Dual VHF/UHF-Antenne for up to 300 W
  • Moonraker Whizz Whip HF/HF/UHF-Antenne for up to 10 W with FM resp. 25 W with AM/SSB/CW
  • A selfmade dipol antenna for VHF/UHF
  • Several marconi antennas like RH660S, RH771 or SRH805S
  • Several end fed lambda-half wire antennas for 15 m to 70 cm
  • Three RTL2832/R820 based SDRs, one with a VHF/UHF, one with an HF antenna and one for mobile use with a telescope antenna
  • A OpenSpot4 Pro for mobile access to digital radio modes
  • Two MMDVM dual-hat hotspots, one for DMR and one for D-Star and C4FM
  • A Shari FM Spot for Echolink and private Servers like FM-Funknetz.de
  • A NanoVNA, a TinySA Ultra, VSWR and Power meters and a 200 MHz oscilloscope
Icom ID-5100E, Yaesu FT-818nd and Yaesu FT-5DE
Icom ID-5100E, Yaesu FT-818nd and Yaesu FT-5DE