jazzboypro
Active Member
Hello all,
A few weeks ago i installed an EFHW 4010 that i bought from myantennas.com. The antenna worked well but of course i could not use it on 80 meter. Last week i ordered the OCF-8010 from myantennas.com. Yesterday i removed the 4010 and i installed the 8010 so i'm using the same coax (LMR400) the same RF choke (also bought from myantennas.com) and the same polyphaser.
Yesterday evening i started testing the 8010 and it did not went well.
SWR is thru the roof on 15-20-80 meter and the internal tuner won't match it. 5 watts is the maximum power i can use on those bands before SWR rises sharply, the other bands are ok.
The OCF ratio is 19%/81%. The transformer is on a mast at about 25 feet (same place as the 4010 that i removed). The shorter leg is in a straight line and runs from the transformer to a tree in front of the house. The first 50 feet of the longer leg runs in a straight line from the transformer to a tree in the backyard (same path as the 4010 i removed)
At the tree the wire makes a 90 degree turn and the remaining 56 feet is in a straight line and is attached to a mast at the other extremity of the house. Un fortunately about half of the last 56 feet runs parallel to the power utility service drop but about 7 feet away from it in the horizontal plane and about the same hight on the vertical plane. The second half of the las 56 feet is over the roof of the house maybe a feet or so above the roof in a certain portion (because of the angle of the roof).
Before i take the 8010 down and put back the 4010 do any of you have suggestions on something i might try to make the 8010 work better ?
Many thanks
73 de VA2FCS
A few weeks ago i installed an EFHW 4010 that i bought from myantennas.com. The antenna worked well but of course i could not use it on 80 meter. Last week i ordered the OCF-8010 from myantennas.com. Yesterday i removed the 4010 and i installed the 8010 so i'm using the same coax (LMR400) the same RF choke (also bought from myantennas.com) and the same polyphaser.
Yesterday evening i started testing the 8010 and it did not went well.
SWR is thru the roof on 15-20-80 meter and the internal tuner won't match it. 5 watts is the maximum power i can use on those bands before SWR rises sharply, the other bands are ok.
The OCF ratio is 19%/81%. The transformer is on a mast at about 25 feet (same place as the 4010 that i removed). The shorter leg is in a straight line and runs from the transformer to a tree in front of the house. The first 50 feet of the longer leg runs in a straight line from the transformer to a tree in the backyard (same path as the 4010 i removed)
At the tree the wire makes a 90 degree turn and the remaining 56 feet is in a straight line and is attached to a mast at the other extremity of the house. Un fortunately about half of the last 56 feet runs parallel to the power utility service drop but about 7 feet away from it in the horizontal plane and about the same hight on the vertical plane. The second half of the las 56 feet is over the roof of the house maybe a feet or so above the roof in a certain portion (because of the angle of the roof).
Before i take the 8010 down and put back the 4010 do any of you have suggestions on something i might try to make the 8010 work better ?
Many thanks
73 de VA2FCS