Günter Köllner (for english language: Guenter Koellner)
Amateurfunk in Vierkirchen / Dachau

Where is Vierkirchen and where am I ?

The Mode-S Beast 

 
DL4MEA (Winter 1997)
(This is a rather old photo, but it has a historic background: it actually is the very first digital picture taken from me, in about winter 1987)





Note:You will find my old homepage here.
The 6-Yagi-EME antenna is for give-away, just a benefit for the material would be appreciated.


Ham Radio: DL4MEA
Location Vierkirchen-Rettenbach, app. 30km north of Munich 
Grid Loc 
ASL
JN58ri
500m 
special interests VHF, UHF, SHF, EME, homebuilding equipment, mechanics 
QRV in following modes 144MHz tropo and meteor scatter (rarely) 
432MHz, 1296MHz, 2320MHz, 3400MHz and soon also 5760MHz EME (very active)

This is my RIG: (Nearly every equipment of my radio station is homemade)

Terrestrial:

144 MHz  RX/TX 
 Preamp 
 PA

 Antenna
 Modes
 FT847 (IC275) 
 MGF1302 (W5UN design) 
 GS35b  (homemade, converted W6PO style
      previously driven by a MRF141G, now when in use with FT847: no driver
 2 * 8ele BV-OPT 2WL (4m) 16m agl
 SSB, CW, Meteorscatter
1296 MHz
 RX/TX 
 Preamp 
 PA 
 Antenna
 Modes
 FT847 + DD9DU transverter 
 ATF35076 in a DJ9BV design (after 13m H2000-Flex cable) 
 TH347
 1.5m dish
 SSB, CW
2320 MHz  RX/TX 
 Preamp 
 PA 
 Antenna
 Modes
 FT847 + DB6NT transverter, 
 DJ9BV-Design 
 2 x MRF21120, about 150W 
 1.5m dish
 SSB, CW

EME:

On EME, I am only QRV in traditional modes and not in any digital. I still want do do the QSOs by myself and lot let it done by the computer. I know that sometimes I am loosing new squares, countries or even continents, but my own satisfaction is worth this. Anyway, I feel that some just digital made activation of a band could be done in CW, too. Maybe you think about this and give me a note.

432 MHz RX/TX 
Preamp 
PA 
Antenna
Feed
 FT847
 KA8RYT cavety (0.3dB NF)
 GS35b  (homemade)
 4.5m dish (f/D=0.32)
 Loop Feed (CT1DMK design)
1296 MHz  RX/TX 
 Preamp 
 PA 
 Antenna
 Feed
 FT847 + DD9DU transverter 
 NE32584 in a G4DDK design (0.3dB NF) 
 TH347
 4.5m dish (f/D=0.32)
 Round septum polarizer feed with chaparral choke
2320 MHz  RX/TX 
 Preamp 
 PA 
 Antenna
 Feed
 FT847 + DB6NT transverter, G8ACE oven oscillator
 NE32584 in a G4DDK design (0.3dB NF) 
 2 x Andrews UMTS PA
 4.5m dish (f/D=0.32)
 Round septum polarizer feed with chaparral choke
3400 MHz  RX/TX 
 Preamp 
 PA 
 Antenna
 Feed
 FT847 + DB6NT transverter version 1, G4DDK LO, G8ACE oven
 NE32584 in a DJ9BV design (around 1dB NF) 
 Toshiba UM2631 (50W)
 4.5m dish (f/D=0.32, mesh size inner 3m trapezoid 21mm x 6mm, outer rim 6.3mm square
 Round septum polarizer feed with chaparral choke (retrieved from a C-Band feed)
5760 MHz
(soon to come)
 RX/TX 
 Preamp 
 PA 
 Antenna
 Feed
 FT847 + DB6NT transverter, G8ACE oven
 ATF35076 in a W5LUA design (???dB NF) 
 I was told 20W
 4.5m dish (f/D=0.32, mesh size inner 3m trapezoid 21mm x 6mm, outer rim 6.3mm square
 Round septum polarizer feed with chaparral choke

EME is strongly supported by a bandscope made from Winrad and an IQ mixer that is connected to the 455kHz IF of my radio. Using this waterfall, I can see signals lower than my CW reading capabilities, and I can also quickly say if there is a chance for a QSO or not.


These are my grid square standings

For some time, I tracked my grid square standings, but I did not update these since many years. Those given here are outdated. While 50MHz and 144MHz became just consolidated since some missing QSL cards arrived, much more were added on 432MHz, 1296MHz, 2320MHZ and 3400MHz (last two not even yet displayed here) due to my contest and EME activities. 

Notes:

50 MHz 
Worked/confirmed squares on 50MHz
(08.07.1998)
(Due to my previous QTH in the restricted area of TV transmitter "Gruenten" 6m is very limited for me. I had an experiemental licence during the first time when 50MHz was legal in DL, but did not renew it for the further time due to that. At my current QTH we are outside of this area, but I am QRV only for fun, not intensivly)
144 MHz 
Worked/confirmed squares on 144MHz
(29.11.1999)
432 MHz 
Worked/confirmed squares on 432MHz
(29.11.1999)
1296 MHz 
Worked/confirmed squares on 1296MHz
(08.07.1998)
 (these maps were generated by AZPROJ)

Once there was the chance to "activate" a quite rare square for meteor scatter, long before WSJT and FSK441 became popular, so still in traditional high speed CW. This was done with the help of DK7MI, who works for Kathrein and so we were able to use their building and an experimental mast on top of their roof.

The Antenna Test Field of Kathrein Antennas, Rosenheim  "DXpedition" to Rosenheim, JN67bu


A special sample: My first signal on 13cm - Yet another way to do a QSO: DK2DB on 23cm (sorry, I lost the "DB"):
(click on the pictures to get them in high resolution)

Subtitle: What is good for VLF, is also good for SHF... or... who says CW must always be at 60 lpm?
And... Yes, my 13cm transverter's frequency is instable...

His initial signal (the first "man made" signal on 13cm I ever received) 
DK2DB on 13cm using FFTDSP
"DK2" on slow speed: each dit is 3sec long 
DK2 decoded


These are my current and older projects:

Some other descriptions which I want to show to you because of interesting details

Stations that I still am or have participated:

DB0ZKA-8: PR-Mailbox in Augsburg

For about 10 years I operated the Packet Radio Mailbox DB0KCP at my parents home. Then due to several facts I decided to shut it down locally and join it with my friend's digipeating system DB0ZKA in Augsburg, JN58ki. Today I am no longer maintaining it, since my interests have changed.

DB0FAI: High Power Experimental Beacon in Falkenberg/Langerringen

Together with Wilhelm, DL5MCG, I am operating the beacon DB0FAI in JN58ic.


My private address (no secret, because it is available through many databases, too):
Am Rain 24
D-85256 Vierkirchen

Email: dl4mea@yahoo.de