This antenna is tuned by the following procedure.
Inverted l antenna for 160 and 80.
Following on from an article in practical wireless feb 2004 by gm0onx which showed how to build an 80 40 trapped inverted l antenna i modified the design to cover 160 80 40.
If you have eznec you can download an ez file of ve7ca s 160 meter inverted l fcp transmitting antenna here.
Good for local contacts.
Here is the pattern of the 160 80 meter antenna on 3 90 mhz.
Double l antenna for 80 160.
Planning a dual band inverted l for 160 80 meters modeling a quarter wave inverted l antenna for the low bands.
Here s a vertical antenna for 80 and 160 fed with a single feed line that is simple effective and requires no ground system.
In the fall of 2007 i was able to install my first amateur radio tower while this certainly was a huge improvement over my humble butternut multiband vertical my new tower had a major shortcoming a lack of antennas for the low bands.
1 put up the entire length of wire and the 4 1 balun and resonate it to the upper end of 80 meters by lengthening or shortening it.
2 check to see that a good swr can be obtained in or near 160 m.
A popular misconception about vertical antennas for the low bands is that they must have elaborate ground systems.
Inverted ls for 160 and 80 meters pros and cons of the dual band inverted l antenna.
Trapped inverted l antenna for 160 80 40 here s a simple antenna which will get you on the air on top band and 80m 40m as well at a pinch in a small garden.
Isolation transformer place an inverted l design an inv l diy.
Between watching unending law and order repeats and the xyl s lifetime movie sagas compounded by a dead 40 meter band here at night i became so totally bereft of late night activities that i got the bug to get back on 160 meters again with something that would fit in my backyard.
With my antenna tuner i can tune the inverted l for an acceptable swr on all bands 80 meters to 30 meters though the radiation angle would be very high.
A dual band single antenna approach introduces complexity by adding a trap.
In fact some have warned against attempting the antenna due to the trap alone.
Winding an fcp isolation transformer why isot that way iso xfmr options fcp project 65 tower l bend 60 tower l bend 160 80 on one l fcp new.
