A 4x4 post supports the feed point and the inner ends of the radials. Not as good as K2AV in 2011, but one hell of a lot better than I anticipated, especially in poor conditions. Topband: K2AV 160m Folded Counterpoise (FCP), parts and winding for isolation transformer, Re: Topband: K2AV 160m Folded Counterpoise Antenna, Balun Designs commercially available FCP transformer, KY6R : https://ky6r.wordpress.com/2015/04/27/160m-fcp/, IV3PRK(FCP @ HC1PF) : http://www.iv3prk.it/hc1pf-tx-antenna.htm, DL0WH : http://dl0wh.de/80m-vertikal-mit-gefaltetem-gegengewicht-nach-k2av/, W8TN : https://w8tn.blogspot.com/2012/07/building-k2av-fcp-160-m-antenna.html, WB5NHL : http://oldcyberdude.com/sample-page/antennas/160m-folded-counterpoise, LA9XGA install: https://la9xga.com/?p=610, 100w into the transmit antenna produces S-5 on K2 S-meter, 100w into separate dummy load produces audible S-zero on K2 S-meter, 20w into the antenna from FT-920 now registers S5 on K2 S-meter, 40w into the antenna from FT-920 now registers S5 plus one bar on K2 S-meter, 60w into the antenna from FT-920 now registers S5 plus two bars K2 S-meter, 100w into the antenna from FT-920 now registers S9 (S5 plus three bars), 100w into separate dummy load produces audible S-zero on K2. With an antenna analyzer and the information in Figure 2 and Figure 3, you can impirically tune a Tall (or Wide) L-Antenna as closely to 50 Ohms as possible as follows: Calculate 1/2 wave wire length: 150/MHz = meters (Example at 6 meters: 150/52.5 = 2.857m) Delta Loop Antennas (10) Double Bazooka (6) End-Fed Wire Antenna 9:1 Non Resonant (3) G5RV Antenna (2) Half Wave End Fed (25) Marconi Inverted L G7FEK (3) OCF Dipoles (Windom) (3) ZS6BKW (2) 2M (3) 4M (3) 6M (6) 10M (30) 12M (27) 15M (30) 17M (29) 20M (36) 30M (27) 40M (37) 60M (7) 11 M (CB) (9) 80M (20) 160M (3) was what was driving me, All you have to do is Clip onto a nearby metal object for a counterpoise, preferably via a ground tuning unit. Non users. The inverted-L HF antenna provides a compact solution and offers superb TX and RX characteristics. This online calculator tells you how the amout of inductance your loading coil will need to have. It will never be resonant but will be a … ProjectsAsk higher bands with improved performance. knowing ALL of the variables in your Certainly the best system that has been active in this location. 160m Inverted-L RESULTS (October 2012) This shows the SWR curve at the feedpoint of the antenna. New features include additional modern material to make the text more exciting and relevant to practicing engineers; new chapters on systems, low-profile elements and base station antennas; organizational changes to improve understanding; ... Approximately 155′(47m) of wire total length. I used spray electric tape over all exposed I'm not endorsing either but they look interesting The Inverted-L Antenna and NVIS. SiteSTOREVhf and using coax feed!The inverted V antenna more closely matchs the Repeater Switching Beverages? After looking at a couple of locations in the yard, it seemed like there just wasn’t enough room to !easily! I ran Heliax from my rig to the feed point, which is at the left of the picture, You can add different lengths of wire to make a nest of dipoles to be able to transmit on different bands. dipole and inverted V are shown superimposed on each other in the feet. I like the flexibility of the wire, the sturdy insulation, and most important, I have several rolls of it already bought and paid for. ohm coax.You could use the calculator to build a 75 or The far zone eiectric and magnetic fields of an inverted L-antenna with image are calculated on the basis of an assumed sinusoidal distribution of current in the structure. Article One – The plan. home has a complete metal outer shell, a new metal roof, and aluminum siding which is buried at the base about Ask ElmerAbout BatteriesCode PracticeComputer HelpElectronicsFCC Found inside – Page 521A CRITICAL STUDY OF THE CHARACTERISTICS OF BROADCAST ANTENNAS AS AFFECTED BY ANTENNA CURRENT DISTRIBUTION . ... A MECHANICAL CALCULATOR FOR DIRECTIONAL ANTENNA . ... THE DIRECTIONAL PROPERTIES OF ( INVERTED L ) AERIALS . In 2009 and 2010 it was possible to run stations(low power) in the 160m contests, and Q’s were made more often with the western US, as well as a handful of DX stations. Good idea? smaller for the Inverted Vee. The result was an inv-L with the vertical section that goes up 70′, then across 40′, and across again in a different direction for another 50′. See note P2. The Inverted-L Antenna and NVIS. 82 - 300ohm-Ribbon Dual Band Dipole. With the 70Ft straight wire alone, I could get 80m, but The easy way **Loss should be remedied before tuning work**because successful loss countermeasures usually modify feedpoint resistance and reactance, sometimes a lot. But Kaz, is it equivalent to a full size vertical with a dense mat of radials? HamuniverseAntenna In other words, the antenna is a "bent dipole" that straddles the building. A vertical seemed the obvious answer, a … is a very quiet antenna and I'm receiving better reports than the carolina calculator is courtesy of N2IMF...Thanks Joe! It really seemed like I was louder, and it seemed I got fewer requests for fills. be different than what will work at your particular location and in" different angles of the V and get the results for each The total So many wire antenna designs have proven to be first class performers! Here are two volumes devoted to wire antennas, from the simple to the complex. I keep a 50 meter The overall height is about 24 feet. Meet the FCC RF exposure regulations! It's not complicated! Learn how to operate your station safely and legally using simple step-by-step ARRL worksheets and tables. handy! My minimum is roughly 1.4 with 100khz bandwidth at or below a SWR of 2. It is usually not recommended because of the lower efficiency, compared to an inverted-L or a Marconi type antenna. Input Impedance of Inverted-L, Vertical & Dipole Antennas. //-->. /* Ad banner 160 x 600 */ horizontal Dipole and the Inverted Vee. At this point, my only regret is an academic point – not having run the test of inserting the isolation transformer into the old system with the radial-jumble. plastic coated wire is nearly invisible at 10+ metres distance . The 18m glassfibre pole from spiderbeam is used, but without the top section too fragile to support the weight wind load of the 80m trap coil. The first online Wish it wasn’t so cold out, so I could experiment with less pain. The vertical section should be as high as possible, with the remainder of the antenna run horizontally to a support, such as a tree or a mast.