Double l antenna for 80 160.
Inverted l antenna for 160 and 80.
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.
Isolation transformer place an inverted l design an inv l diy.
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.
A dual band single antenna approach introduces complexity by adding a trap.
If you have eznec you can download an ez file of ve7ca s 160 meter inverted l fcp transmitting antenna here.
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.
160 meters and 80 meters.
2 check to see that a good swr can be obtained in or near 160 m.
Inverted ls for 160 and 80 meters pros and cons of the dual band inverted l antenna.
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.
In fact some have warned against attempting the antenna due to the trap alone.
A popular misconception about vertical antennas for the low bands is that they must have elaborate ground systems.
Good for local contacts.
Planning a dual band inverted l for 160 80 meters modeling a quarter wave inverted l antenna for the low bands.
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.
Here s a vertical antenna for 80 and 160 fed with a single feed line that is simple effective and requires no ground system.
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.
How to build an inverted l for the low bands 40m 80m and 160m an inverted l is just like a vertical apart from the fact that instead of going straight up like a tuned quarter wave it turns 90 degrees somewhere.
160 inverted l antenna by n4jte.
