160 80 Meter Inverted L

Again my friends 160 meter inverted l was a 3 8th wave so in essence 200 feet not the 124 feet shown in this diagram.

160 80 meter inverted l.

160 meters and 80 meters. Although the radial system is far from ideal the inverted l has been able to gather both local and dx contacts on 80 40 20 15 and 10 meters. An electricalquarter wave of rg213 at 1 83 mhz is 88 or 27m. A true wave would be 132 5 feet in length i use the true and tested formula of 1005 freq in mhz length in feet 1005 1 900 mhz 529 feet which i multiplied that length by 3 8 s or 375 529 x 375 198 4 feet.

With the help of the 4 1 balun the 450 ohm ladder line and the trusty drake mn 4 antenna transmatch i ve been able to keep swr on all bands below 1 7 to 1. Inverted ls for 160 and 80 meters pros and cons of the dual band inverted l antenna. An efficient 160 meter inverted l will have a feedpoint with a natural 20 35 ohm r where x 0. 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.

In place of an active tuner a 10 turn 4 inch diameter tapped coil wound of 0 250 inch diameter copper wire is used to tune the 1 8 to 2 0 mhz band in three segments. In fact some have warned against attempting the antenna due to the trap alone. Having a single wire to cover the lowbands is tempting but may not be worth the increase in complexity. A dual band single antenna approach introduces complexity by adding a trap.

160 inverted l antenna by n4jte. Diagram of 160 80 meter inverted l optional method instead of using the mast as the vertical radiator set the coil about 2 feet out and away from the mast at the top and use wire as the vertical radiator instead of the mast and then drop and terminate the vertical radiator wire in the pvc coupling where it is terminated with the coax center. Isolation transformer place an inverted l design an inv l diy. The geometry actually resembles an inverted l that has partially fallen over in other words a lazy l.

Planning a dual band inverted l for 160 80 meters modeling a quarter wave inverted l antenna for the low bands. And on a small lot that swr meter is very likely looking to a 160 antenna through an electrical quarter wave ish length of 50 ohm coax 60 80 100 feet or 20 25 30 meters.