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Antennas : ULTRABEAM 2 ELEMENTS 6-40 twelve meters from the ground, the tower is shunt fed for 80 with a remote controled matching system and can be adjusted on all the band , very short half slooper on 160m (only 15.5 meters long ) ; trx: ELECRAFT K3 with HAM RADIO DE LUXE , HEIL PROSET with C4 or GELOSO M70 for ssb and BEGALI SIMPLEX paddle for cw . Some FT8  JT9 and JT65 with a YAESU FT991 ,WSJT-X  and JTALERT-X with a power of 30W .  

Interest for technic and dx. 

Modification of the Ultrabeam 2el 6-40 for 6m: performances on 6 are poor, the antenna is only a 2el: a  radiator with a director at very wide space. Now the antenna is a four elements. The Ultrabeam director is now the reflector and i add 2 fixed aluminium directors. The modelisation was done with MNANA. The realisation is at zero cost with old antenna material and no structural modification of the ultrabeam.

Directivity on 6m is now reversed. Results are not optimum ( Z 38 homs ) and need some more work,  but better than with 2el. Font back and front side ratio are good . Swr is 1.24 at 50.200 and pass band is large.
It will be ok for this 6m season...


8357507 Last modified: 2017-09-29 03:25:03, 1817 bytes

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