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QSL: ONLY VIA LOTW AND EQSL ! NO DIRECT PLEASE !

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My antennas today :   - home made 2 el YAGI 3,8 Mhz (total element length is about 24 m,shortened with home made coils)

                                  - home made 4 square 3,5 Mhz (wire elements with toploading 13 m high,feedpoints 2 m from ground)

                                  - home made 5 element YAGI 18 Mhz (interlaced 80 m)

                                  - shunt fed tower 1,8 Mhz

                                  - stack of two 5 elements OP DES 14 Mhz YAGIS

                                  - Rx : 200 m long beverage NO and active Rx loop ALA 1530 LNP

 

All antenna work is just a one man (me) made job.....

 

 

Radiation diagram for my 2 el 80 m yagi.

Maximun gain is 6,6 dbi (free space) and F/B is 25 db.

Very high Q loading coils home made are used in order to shorten elements to a practical length of about 24 m.

High Q coils are needed to keep losses at minimum. Coil design also took into account the lack of any parasitic resonance on the

HF spectrum.        

                                                                                                            Home made high Q coils OT4A

                                             

                       

 

     Radiation diagram of my stack of the two 5 el yagi's OP -DES 20 m 13 m apart bottom one 13 m high.

                                             Maximun gain is 16,64 dbi and F/B 26db.

 

                   

Below the picture of my old antenna system, replaced since july 2017.....home made 4 element 40 m Yagi with stack of two KT34XA's....they were up in the air for more than 15 years and i certainly made lots of qso's with them....  

                                                                 

 

           

         

                                                       

 

                                                See more at http://ot4a-theo.webnode.nl

 

                                                             

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8229266 Last modified: 2017-07-21 18:26:16, 4664 bytes

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QRZ Logbook Summary for - OT4A
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dedateband mode grid Country op
F1FPL 2017-01-22 30M CW JO10kk France DIDIER FOUQUES
EA8/G0EFO 2017-01-22 30M CW IL27gw Canary Islands
IZ2AMV 2017-01-22 30M CW JN45ol Italy DIEGO QUIRINO
OG8G/QRP 2017-01-22 30M CW KP20np Finland
K2BB 2017-01-22 30M CW FN30au United States ALEX MALYAVA
W6RH 2017-01-22 30M CW DM04me United States ROBERT HANSON
F6CUT 2017-01-22 30M CW JN38hs France
G4PVM 2017-01-22 30M CW IO91vl England Paul TITTENSOR
E72MD 2017-01-22 30M CW JN94im Bosnia and Herzegovi Darko Malinovic
F8AAN 2017-01-22 30M CW IN95mh France DAVID ALBERT
EA7JRE 2017-01-22 17M CW IM76nm Spain Manuel Merino
RA9MAS 2017-01-22 17M CW MO64qx Asiatic Russia Vlad Shamshurin
OE5RI 2017-01-22 17M CW JN77dx Austria KARL REINPRECHT
F5JNX 2017-01-22 17M CW JN37pv France JEAN-MARC KELLER
DL7VA 2017-01-22 17M CW JO62tm Germany

Book Totals: 253736 qso's   20379 confirmed Get a free logbook at QRZ.COM


c
United States Award#2118
Granted: 2016-05-15 06:35:04   (OT4A)

Endorsements:
  • 17 Meters Mixed
DX World Award#3796
Granted: 2016-05-15 06:35:03   (OT4A)

Endorsements:
  • 20 Meters Mixed
  • 40 Meters Mixed
Grid Squared Award#11543
Granted: 2016-05-14 06:35:03   (OT4A)

Endorsements:
  • 5 Band Mixed
  • 10 Meters Mixed
    15 Meters Mixed
    17 Meters Mixed
    20 Meters Mixed
    30 Meters Mixed
    40 Meters Mixed
    80 Meters Mixed
World Continents Award#12828
Granted: 2016-05-14 06:35:02   (OT4A)

Endorsements:
  • 5 Band Mixed
  • 10 Meters Mixed
    15 Meters Mixed
    17 Meters Mixed
    20 Meters Mixed
    30 Meters Mixed
    40 Meters Mixed
    80 Meters Mixed
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