Photo-Gallery showing Contest activities of German Amateur Radio Stations

Bodo DL7AFB and DL7AKL Wolfgang

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2010 - March, Visiting DF0MTL

 

Since we both, DL7AFB and DL7AKL, are active at nice and warm weather only, the March-Contest is a good time for making a visit to some other contesters in the neighbourhood. This year we visited the club station DF0MTL operating from the "Deditzer Hoehe", in JO61JF. Stefan, DL9GRE, gave a warm welcome and introduced us to the crew. The pictures showing (left) Microwave Station 23cm and up on 1m dish (middle) Winter impressions. Combined 2-m and 70-cm set-up in front (right)  VHF-UHF-Antennas. Watch video on YouTube.

2009 - September, IARU Region 1 (Europe) VHF-Contest from JO62ja, 155m asl

(left) Anchor: 4mm high strengths HPPE rope (Liros Regatta-2000) tied securely to anchor. (middle) New 15-meter / 50-foot tower with 4 stacked 9 element F9FT Tonna Yagis came to first operation. The three upper sections are made out of 35mm DURAL® like alloy pipe. The lower section is realised by plug-able 40mm, 45mm and 50mm AlMgSi1 alloy pipes, respectively. (right)  CQ-Contest: DL7AFB at his station, which was built up in a tiny trailer. This shelter protected from heavy weather this weekend. The station set up: Elecraft K2, homebrew high dynamic range transverter (built by DL7AKL), HA1YA high power amplifier ME-750VB incorporating a GU-74 tube and Amilo PC. Watch Video on YouTube.

DX 144MHz (TR) > 600km: LY2WR, 9A5Y, TM0W, 9A1P, 9A1B, OM0WR, S57C, IQ3AZ, S53A, HA6W, HA5KDQ, F4CQY/P, HB9R/P, 9A1CMS, S53D, S52XA, S59P, HG7F, HA2R, HB9QT, S59R, S57O, S57M, HB9CQL, F4EHB/P, F6KUP/P, HA2FA, F5AEG/P, SM6EHY, F8KID, PA6NL, UA2FL

QSOs 2m:

(thanks to OK2PBQ providing this beautiful map)

2009 - July, DARC VHF-UHF-SHF-Contest from JO62ja, 155m asl
2-m Band: DL7AFB  //  70-cm Band: DL7AKL

(left) DL7AKL at his station: Elecraft-K2 transceiver and self made 432-28 transverter  (middle) A new plug-able mast system from www.tecadi.de ought to replace the recently used 3 stacked yagis array by a 4-stacked system. Unfortunately the aluminium pipe did not withstand the tremendous mechanical stress during erection and broke - see detailed report below. So we had to improvise a smaller set-up out of the remaining pieces.  (right)  Thunderhead on the horizon, a herald of a upcoming thunderstorm that brought heavy rain and lightning during the night.

DX 144MHz (ES) > 1500km: CT1ANO, EA1YV, EA1AHO, EA1AEN, EE1URO, EB1GMC/P, EA1XT, EA1HF/P, EA1AAA, EA2AZW/P, EA1DDU. (TR) > 600km: LY2WR, 9A5Y, G0KPW, HG3X, IQ3AZ, HA6W, HB9N, HG6Z, HG7KLF, HA5KDQ, S59P, HG1Z, HE8AJ, HA2R, OT7E, ON4KHG, S57O, SK6AW, HB9PZQ/P, S57M, OM3KTY, HB9HR, OZ5GX, F5AEG/P, OM5XX, F6EJN/P, F8KID, OM8MF
DX 432MHz > 500km: HA5KDQ, S50C, S59R, PA6NL, ON4ZN, OM8A, HA1KYY, SM6DVG, OE9G, DL0KB, DF0AP, SP9EML/9, OE3JPC, OZ9PZ, SN9D, DL8GP, SP9MRU, OK2BVE, OK2POE, OZ7SKB/P

QSOs 2m:    QSOs 70cm:

Experience made with TECADI Mast Systems

Disaster during first erection: for correct adjustment of all guy ropes the first trial was carried out carefully without any load. Step by step three, six, nine and at last twelve 1.2-m segments were stacked giving a total height of 14.4-m. As recommended, each third segment got a guy. At 3.6m, 7.2m, 10.8m, 14.4m, respectively, the mast was tied with 4mm high strengths Dyneema® rope. A  4.8m gin-pole made out of four TECADI segments and a pulley was used for lifting the mast. After reaching an elevation of about 60° at full length the mast suddenly collapsed. Pictures showing the material damage. Luckily no one got injured.

2009 - May, DARC VHF-UHF-SHF-Contest from JO62ja, 155m asl
2-m Band: DL7AFB  //  70-cm Band: DL7AKL

(left) DL7AKL's well proven 8x12 element DL6WU array newly equipped with low-loss Aircell-7 feeding lines as well as Ecoflex-15 main-line framed by beautiful rapeseed plantation. (middle) details of auxiliary 8x8 element DL6WU-K7MEM Yagis array on test bench in the back-yard. (right)  to improve the coexistence to our closest neighbour station, DF0YY, which is just 23km away and in direct line of sight, the location of the 2m antenna array was moved to be from their point of view behind the large metal tower of a Megawatt Wind Turbine. This arrangement improves the interference level about 10dB.

DX 144MHz > 600km: I4VOS/4, LY2WR, 9A5Y, HG3X, F6KCP/P, 9A1W, IQ3AZ, SM1A, S59DEM, 9A2TK, HG6V, ON4WY, SK6HD, HG7KLF, S50G, HA5KDQ, F4CQY/P, HB9TTY, HB9BQU, HG1Z, HA2R, ON4KHG, S57O, S57M, S56P, HA7P, OZ6ABA, HG1W
DX 432MHz > 500km: 9A1CMS, PA6NL, DF5GZ/P, ON4PS/P, DF9PX, DJ5NQ, OZ9PZ, DL8GP, OE3A, OM2RC, OM3KMA, DQ3Q, OM3KII

QSOs 2m:    QSOs 70cm:

2008 - May, DARC VHF-UHF-SHF-Contest from JO62ja, 155m asl
2-m Band: DL7AFB  //  70-cm Band: DL7AKL

(left) 2-m: beside the main aerial consisting of  3 stacked 9 element F9FTs a new omni-directional antenna came to first operation, equipped with separate 100W PA and BF512 Pre-Amplifier (middle) details of parallel line open feeder with spacer made out of PVC pipe - attenuation was measured to be < 4dB/100m (right) 6-fold stacked end driven bend full wave dipoles giving about 8dB_D gain at omni-directional pattern

DX 144MHz > 600km: HA6W, S52AU, HG7KLF, HA5KDQ, HA2U, HB9TTY, HG1Z, HA2R, S57O, HB9PZQ/P, S57M, HG80HQ, HB9RF, S53O, HB2008AG, HA2FA/P, OM8MF
DX 432MHz > 500km: G8P, F6HGC, PA6NL, HB9GT, OM8A, DJ7PM/P, OS0V/P, DJ5NQ, OZ9PZ, DK8VS, DL7ACN, F8KHH/P

QSOs 2m:    QSOs 70cm:

2007 - Oktober, IARU Reg.1 UHF-Contest from JO62ja, 155m asl
70-cm Band: DL7AKL

DX 432MHz > 500km:  F6HGC, HA5KDQ, HB9CR, HB9KAG/P, HB9RF, F6KUP/P, PI4Z, HG1W, PA6NL, HB9GT, ON4PS/P, DF5GZ/P, ON4HRT/P, OM50KHE, DF1VW, F6IRS, DL0FM, OZ1BEF, OE3A

2007 - September, IARU Reg.1 VHF-Contest from home location JO62kg, 80m asl

Just distributing some points from home location with 200 Watts and a pair of tonnas 9 elements fixed to SE.

DX 144MHz > 600km: 9A5Y, S53D, HA2R, S57O, S57M, HB9DKZ, OM8A

2007 - July, DARC VHF-UHF-SHF-Contest from JO62ja, 155m asl
2-m Band: DL7AFB  //  70-cm Band: DL7AKL

(left) 2-m Contest Operator DL7AFB at his station (middle) Field day impressions: 2m array in front, 70-cm station in background (right) 70cm Power Amplifier with 4 x RA45H4047 MOS-FET Modules at antenna feed-point delivering > 300W; each PA incorporates a low distortion low noise LNA with BFP193 (YU1AW design). Both, PA and LNA are combined by in-phase Wilkinson coupler.

DX 144MHz > 600km: I5PVA/6, 9A5Y, HB9MM, HB9N/P, HG6Z, HB9DPY/P, HA5KDQ, F4CQY/P, S50C, HA2U, HB9BA/P, HB9AJ, HA2R, ON6ZT, S51SL, S59R, S57O, S57M, HG5M, HB9RF, HB9AG, OM7JG, OZ5GX, OM5XX
DX 432MHz > 500km:  F4CUU/P, HA1KYY, DG1GLH/P, DF5GZ/P, ON4SHF/P, OM50KHE, SN9D, OE3A, OM3KII

QSOs 2m:    QSOs 70cm:

2007 - May, DARC VHF-UHF-SHF-Contest from JO62ja, 155m asl
2-m Band: DL7AFB  //  70-cm Band: DL7AKL

(left) 2-m Antenna in front of Wind Power Station (middle) VLA-200 Power Amplifier with additional fan and some big capacitors (right) DL7AKLs new 8x12 elements homebrew 70-cm array using open feed line technique

DX 144MHz > 600km: 9A5Y, S59DEM, HA5KDQ, HB9FX/P, S50C, HA2U, HA2R, ON6ZT, S59R, S57O, HB9RF, PI4Z, OM5XX, OM8MF, PA6NL
DX 432MHz > 500km:  G8P, PA6NL, DF9TF, ON4PS/P, DF5GZ/P, ON4SHF/P, DL0KB, SP2VGH, SP2QVH, DK8VS

QSOs 2m:    QSOs 70cm:

2006 - October, IARU-Region1 UHF-SHF-Contest from JO62ja, 155m asl
70-cm Band: DL7AFB  //  23-cm Band: DL7AKL

(left) 70-cm antenna array: 4 x 22el. plus 3 x 19el, both fed with PA as well as LNA (middle) 23-cm array 4 x 16 el., 23-cm Power Amplifier with 2C39 on top of car (right) 'big' array after erection; an extra lever is necessary to withstand high bending forces

DX 432MHz > 600km: F6KIM, PA6NL, OM8A, DG1GLH/P, ON4PS/P, DF5GZ/P, OM0C, DF1VW, DL2YOU, DJ5AP/P, LX/PA1TK/P, DK8VS, OM3KII

QSOs 70cm:   QSOs 23cm:

2006 - July, DARC VHF-UHF-SHF-Contest from JO62JA, 149m asl
2-m Band: DL7AFB  //  70-cm Band: DL7AKL

(left) DL7AKL doing contest operation on his homemade 70-cm station. On top high dynamics transverter, incorporating TAK-1H high level mixer, Norton-Feedback Pre-Amplifier and Mitsubishi linear Power Modules (middle) 2-m array 3 x 9 el. F9FT; (right) Wolfgang seems satisfied with PA-performance

DX 144MHz > 600km: 9A1CRS, HB9N/P, S57C, ON4WY, HB9RDE, HA5KDQ, HB9BS/P, HB9FX/P, HB9WM/P, HB9CWS/P, HG1Z, HB9AJ, HB9MG, S59R, S57O, HB9PZQ/P, S57UN, HB9RF, HB9AG, ON9CTZ
DX 432MHz > 500km:  ha5kdq, hb9fx/p, s51zo, hb9rf, s52m, hb9ahd, dg1glh/p, dl0blg, df5gz/p, on4shf, on6tx/p, dg9px, dl0kb, dl0bq, dl2gan/p, oe5d, om3kii

QSOs 2m:   QSOs 70cm:

2006 - May, DARC VHF-UHF-SHF-Contest from JO62JA, 149m asl
2-m Band: DL7AFB // 70-cm Band: DL7AKL

(left) 2-m Station: FT225RD Mod, 486-Computer, ETM-4C Keyer on driver seat. Power Amplifier has been mounted at antenna feedpoint, as shown below. (middle) in front 70-cm array 4 x 16 el. DL6WU-Design ultra light weight, vertically stacked; in background 2-m array 3 x 9 el. F9FT; (right) 70-cm Station: TR-7, homebrew Transverter, on top K2RIW Power Amplifier with Power Supply unit. Weather was fine due to high pressure system over Scandinavia, condx were average.

DX 144MHz > 600km: IK0DDP/7, HA6W, HA3KZ/P, F6KIF/P, HA5KDQ, F4CQY/P, S50C, HB9CWS/P, HG1Z, HB9WCR/P, S57O, HB9RF, HB9AG, PI4Z, F6CAL, HG1W, ON9CTZ, OM8MF
DX 432MHz > 500km:  SN2P, OZ9PZ

QSOs 2m:    QSOs 70cm:

2006 - March, Visiting DF0YY JO62gd, 200-m asl

Since we both, DL7AFB and DL7AKL, are active at nice and warm weather only, the March-Contest is a good time for making a visit to some other contesters in the neighbourhood. This year we visited the club station DF0YY operating from the "Hagelberg", in JO62gd, near Belzig. The pictures showing (left) overview, countless metal towers providing each band an individual antenna (middle) SHF dish in front of UHF antenna (right) Pit, DL7UHU, gives some explanations on his IR-light-wave equipment to DL7AKL.

2005 - November, VHF-CW Marconi Memorial Contest, DL7AFB/p (JO62JA), 149m asl

(left) DC distribution unit on top of 12V-66Ah car battery - instead of external AC power generator the car engine was used the very first time - at the end the petrol consumption was less than 1 L/h. (middle) 3 x 9 el. F9FT vertically stacked, (right) VLA-200 Power Amplifier at Antenna Feed Point

DX 144MHz > 600km: 9A2KD, 9A7D, F6KAR/p, 9A1B, HA3KGC, 9A2L, S57C, F5SE/p, S50C, HB9BA/p, S59P, HG1Z, HB9KAB, HA2R, S59R, ON7RY, OE6WIG/6, PA5KM, F6FET/p, ON4TX, ON9CTZ, HG1W, HB9RF, OO7EH

QSOs   

2005 - September, IARU Reg.1 Contest, DL7AFB/p (JO62JA), 149m asl

DL7AKL (left) and DL7AFB (right) assembling the 3 x F9FT Antenna Array
View on 2-m portable station (middle)

2005 - July, DARC VHF-UHF-SHF-Contest, Multi-Op, Callsign: DL7AKL/p (JO62JA), 149m asl

Sunset: 70-cm Station in front (left), DL7AKL rising the tower (right)
Equipment: 4 x 21 el. DL6WU (homebrew, 10m up), TR7, Transverter (homebrew), Power Amplifier K2RIW 2 x 4CX250, MGF1302

Test Setup of the 70-cm Antenna Array in my backyard

... ready for erection! 

2005 - May, DARC VHF-UHF-SHF-Contest, DL7AFB/p (JO62AJ), 145m asl

Bodo, DL7AFB, at 2m Station. Equipment 2 x 9 el. F9FT, FT225RD (modified), CF300, no PA

2005 - May, DARC VHF-UHF-SHF-Contest, DL7AKL/p (JO62JA) nr. Zeuden

Wolfgang, DL7AKL, mounting the 432 MHz antenna array. Equipment 3 x 21 el DL6WU (homebrew GFK Boom ultra light weight), Mitsubishi Power Modules M57745 M67728

1995 - October, IARU Reg.1 UHF-Contest, DL7AFB/p (JO63CJ), nr. Plau am See, 118m asl

IARU-Reg.1 UHF Contest. Equipment 3 x 21 el. DL6WU, 4CX250 Power Amplifier.

1995 - July, DARC VHF-UHF-SHF-Contest (JO73AD), nr. Golm, 100m asl

1994 - August, Bayrischer Bergtag BBT, I3-DL7AFB/p (JN56WK), Marmolata ~3300m asl

The Queen of Dolomites: Contesting on Marmolada about 3342 m a.s.l.

1990 - February, Bayrischer Bergtag BBT, Y2-DL7AFB/p (JO60FJ), nr. Klingenthal ~800m asl

Amazing, Contesting in Y2!

1987 - August, Bayrischer Bergtag BBT, DL7AFB/p (JN47AU), Feldberg, 1493m asl

Foggy weather during this contest, 4 x 9 element DL6WU on wooden boom

1986 - Oktober, IARU Reg.1 SHF Contest, DL7AFB/p (JN62NM), Hahneberg, 87m asl

DL7AKL at his 23cm Portable Station

1985 - August, Bayrischer Bergtag BBT, DL7AFB/p (JN47AU), Feldberg 1493m asl

Meeting with Gerhard, DJ5AP, and Gerold, DF5GX in front of the Antenna Areal

1985 - Summer, Test of BBT contest equipment in Berlin Lübars

DL7AFB testing new portable equipment, light wight 4 x 9 Element 432 MHz Yagi

1984 - First time qrv on 23cm

DL7AFB connecting feed line to parabolic dish antenna (left), 23cm linear Transverter and PA (right)
Transverter design by DK5GB and DL7WC

1984 - DUBUS meeting in Berlin Lichterfelde

DL7AFB - DL7APV - DL7SD - DL7HG - DL7ACG - DC7CR - DL7QC

1984 - EME Antenna

Worked 6 EME Stations during EME-Contest in October, 1984

1984 - October, IARU Reg1 UHF-SHF-Contest, Contest-Callsign: DL0FI/p

Contest location in Berlin Heiligensee (Konradshöhe) 60m (a.s.l.).

1983 - May, DARC VHF-UHF-SHF-Contest, Contest-Callsign: DL0FI/p

In Co-Operation with our lokal radio club "Ortsverband Berlin Charlottenburg, D01" we started a successful series of contests. First location was the enclave of Berlin-Eiskeller (32m a.s.l.).

IARU Reg1 UHF-SHF-Contest in October 1982, Contest-Callsign: DL0JR/p

(letf) DL7ZL, DC7YS, DL7APV, DL7AFB, DL7AKL mounting the 8 x 21 Element Yagi Array.
(right) On top of campinig caravan DL7APV - DL7AFB
Location "Freizeitpark Lübars" (88m a.s.l.)

Test Setup of the new 8 x 21 Element Yagi Antenna Group in 1982

Nice Antenna, but poor location at our home in Berlin-Charlottenburg (30m a.s.l.)

Equipment between 1981 ~ 1982

(left) 2 x 16 Element F9FT fully erected at 16m above ground
(right) DL7AKL at the radio

1981 - July, VHF DX-Pedition to OZ (JO47, former "ER"-Square)

(left) DL7AFB doing qso on 2-m, (right) SWL Walther and DL7AFB mounting the antenna

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