## 160 meter Antennas

I live on a limited lot measuring 47m by 89m, but the good thing about it is its proximity to salt lake Karataban of 1 mile in diameter. The lake is just behind the backyard fence and is in the western direction in respect to the house and my HF antennas tower. You can get in idea from the picture down below showing the house and the antennas. The lake can be seen behind the house. Erecting effective m antenna on a small lot is a challenge. It took several attempts including a top loaded vertical of 28 mh with 20 ground radials each 40m long and laid within the property limits. The base of the vertical was 14 m away from the water, so some radials rested in the water. The antenna worked very well as I felt it. What great ears you guys have! Then someone fired up the grass on the property in spring of and the vertical, other multiband HF antenna, the fence, partly the house got badly damaged. So, I had to rebuild the damaged things. I loved my vertical, but I knew it was too noisy because of its omnidirectional pattern. I wanted some protection from the noise sources located within the village to the East of my house. So, basically I needed some directivity — gain to the West, suppression to the East. I built a bigger HF antenna after the fire on a 31 mh tower and I was thinking of it as a support for the top band antenna. I came up with a lazy sloper as I called it. See it on the picture. You can see the upper part of it the inner conductor one on the picture, the white wire, bent backwards to the ground at near the top of the tower obviously, the height of the tower lacks 6 — 7 meters of height to accommodate the upper leg of half wavelength sloper. The feed point is at 3,2mh and 21 m away from the tower. The model showed 10 dB of Front-to-Back ratio at the angle of 23 degrees. Just enough for such a simple antenna. In the skimmer infrastructure was being built but not existent in the practical meaning. Oh, and the most interesting part of it all — the transmitters used in this test. I can only speak for myself. The amplifier utilizes a pair of GU72 tetrodes each capable of W Plate dissipation. While looking up the data you can refer to the UD4FD skimmer picture to see when each station was running. More than just DX News. DL9GTB skimmer. SV8RV skimmer. SM6FMB skimmer. G0KTN skimmer. UD4FD skimmer. Prev article Next article. Share with friends. Comment text.

## K6MM 160m Antenna

Antennas - An Introduction: The antenna system is the most important part of any radio station. Since antennas often have directional characteristics, many stations have several antennas. At my station I have four antennas: 1. Butternut vertical 2. End fed wire 3. Zepp 4. If I wish to work DX or work stations in any direction on the 40m, 30m, and 20m, 15m, and 10m bands, I use the Butternut vertical. For AM broadcast band listening and short wave listening I use the end fed wire antenna. On 80m and 60m I use the zepp antenna. I also use the zepp antenna on 40m if I wish to work stations to the east or west. If I wish to work stations to the north or south on 40m e. Florida then I use the Butternut vertical. On m I use the zepp antenna reconfigured as a "T" antenna. The station also features a radial system for the Butternut vertical antenna as well as a fan counterpoise system for use with the "T" antenna on m. Without these "ground" systems the antennas will not work properly. The antenna is now available from DX Engineering. My original Butternut finally wore out after 38 years, so I bought a new one, and saved the old one for parts. I use the vertical antenna on 40m, 30m, and 20m. Though it can operate on 80m, I normally use my zepp antenna on that band. I have found that the vertical does a great job, especially considering that it is omnidirectional. I have found it particularly good for DX work, especially on the 30m band. If you decide on using a vertical antenna, than be sure to make the commitment to putting in a good radial system. Without a radial system, the antenna will perform poorly! I connect my Butternut vertical to one of the coaxial inputs of my Palstar Antenna Tuner.

## Simple and effective 160m antenna at UA9BA

A M vertical antenna for smaller suburban sites. Notice the solder blob on the aluminium electrode. The coil was some sort of heat exchanger I recovered from the Engineering dumpster and have repurposed to serve as a coil. It started life as a coil, it is just more "coilly". The industrial strength taps on this coil were added by me. There is no particular purpose for these tapsapart from increasing the utility of this coil for antenna loading. It was a bit useless without the taps as it would have been quite hard to find and then attach a feed point wire. The real purpose of the taps was that I had purchased a Bernzomatic Fat Boy Propylene burner so that I could learn how to braze copper and other things. This project provided a platform with which I could acquire this skill and practice it. It worked quite well and I am most impressed with the Bernzomatic Burner. Propylene does not burn as hot as MAPP. MAPP was the "poor man's acetylene". I would like the utility of acetylene, however there are some very significant cost, safety and licencing hurdles to overcome, for which I do not have the will or need. Propylene will have to do. The Bronze brazing rods sold with the Bernzomatic torch have a low enough working temperature to be used for steel and iron brazing with this propylene torch. It is a real shame that MAPP gas is no longer available. Brazing is not like soldering. If a mistake is made it must be ground away and you begin again. The reason it cannot be reflowed is that the silver which forms a eutectic in the braze is absorbed into the the copper base metal. The melting point of the the braze filler metal is now too high to reflow, thus, you only get one go to get it right. The tap elements were formed from copper pipe and held in place with copper wire for the brazing operation. This antenna is suitable for amatuer construction in a suburban situation where a larger tower is impractical. After being most generously given a Seacom Marine AM transceiver by VK3ASE, my attempts to use it were thoroughly thwarted by the simple fact that a horizontal antenna just does not get out, and a short horizontal antenna only 10 meters longs gets out even worse! Thus was born this project, the aim of which is to to construct a shortpractical vertical with an inductively loaded top hat that would be usefull for both m and also 80m. It was also meant to be the first practical application of my recent discovery of soldering to aluminium and aluminium brazing. The antenna had to be "self erecting", be self supporting with only minimal guying, be as inconspicuous as possible and also survive being passed of as a flagpole! The weight of this meant it could only be raised by a team and would require very secure guying in order to not be a hazard. The 6 meter combined length of the aluminium tube means that I can safely erect this pole without assistance. I can lift the entire assembly with one hand! There is nothing new in this design, it is all by the book. The variation of the usual theme is that it is base insulated and this caused my many late nights thinking of how I could make a practical base insulator that could also take a high turning moment and be consistant with the need for a tilt over erection mechanism. I think you will find this design to be a practical and readily reproducible.

## Wich is the best 160m antenna ?

I've modified the Front End of my old ANC-4 adding a tuned resonant circuit at the Input of Noise Channel low impedance Input to resonant circuit, next High impedance paralell resonance circuit using ferrite core and RX tuning capacitor I can cover in 4 sub-bands from 1. Thanks to selective resonance circuit at the Input of Noise antenna I can avoid intermodulation products when propagation is in a great shape birdies appeard every 5kHz or every 10kHz. According to local noises in my location a 5 floor block of flats, 19 neighbours in that house and about neighbours in metres circle around my location I can say today that my modified ANC-4 is an exellant tool to fight with local noises". With the new antenna I was able to hold a CQ frequency for lengthy periods and many stations called me. This has never happened before. This never happened before. In addition, several times I heard local hams who run high power approx. I would call as well and every time I was also able to make the contact. My conclusion is that my new meter antenna is working very well. New Meter Transmitting Antenna I have always enjoyed operating on meters. I built my first homebrew meter transmitter in with parts from a discarded TV set. It incorporated a pair of 's in the final putting out watts. Over the last 28 years I have tried many different meter antennas. My most recent antenna for top band was an odd shaped meter full wave length loop. I have very little space to lay radials on our city sized lot. Since a vertical Inverted L is really a end-fed antenna it requires some form of path for the return current which typically is either an elevated or buried radial system. A properly constructed FCP can also serve this purpose within a total length of only 66 feet. Using radials one needs a radius of approximatley feet and thousands of feet of wire which is not an option at my QTH. I built my FCP over one end of our home at 15 feet above the ground. The vertical wire is 61 feet and then horizontal for 64 feetwith another 51 feet of wire sloping down at 40 degrees from the end of the 64 foot length of wire for a total wire length of ft. I am fortunate to have two 90 foot trees on opposite ends of our city size lot to support wire antennas. The recommended K2AV isolation transformer has leakage inductance of approximatley 17 uH. I determined that Pf in series with the radiating element would resonate the antenna near to provide a good match to 50 ohms for my transmitter.