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Attic dipole antenna


attic dipole antenna So the antenna I'm thinking about doing might be * way too large for my property. Previous experiences with indoor antennas had demonstrated to me that it’s a good idea 80/40 Meter Attic Antena I live in a tightly packed urban neighborhood without much room for antennas. I purchased an SGC-239 auto antenna tuner, put it between the My W8AMZ OCF antenna installation in my attic. Many people still choose to install their TV antenna in the attic for aesthetic reasons, or to comply with neighborhood guidelines. The standard dipole is widely used in its basic form. MK - By Definition "In-the-Attic" In-the-Attic = Limited Space and Antenna Size. Attic antennas have a couple of benefits compared to mounting an antenna outdoors: primarily it allow you to be totally stealth, which is important if you live in a neighborhood that restricts outdoor antennas. Antenna size limitations are solely dependent on the available room in the attic that allows rotation of the beam without hindering its rotation. An expensive attic antenna is a good alternative, but that can cost $200 or more. Many consider this invention to be the reason that television viewing and popularity soared in 1950s and 1960s. I understand that it is a compromise to put a 27 mhz antenna inside but I want to make the most of this and I need a recommendation for a good antenna that can resonate on 27 mhz while installed in an attic. Step. Design Goals and Objective: Construct a compact, 20 meter rotatable dipole antenna of durable weather worthy components supported at a single point obviating the need for multiple supports and multiple support ropes Dipole antennas are said to have a gain of 2. . My 40m dipole is all wavy / zigzagged to take up the length (we're talking an attic that's like 25 feet end to end). It is my choice for digital modes and does not dissapoimt at the lower power levels used in JT65. I support the feedpoint on a push-up painters pole on the rear of an RV trailer and drape the wire over a nearby tree branch. 14 dBi, which is in comparison to an isotropic antenna. The 40 meter dipole was loaded with some coils so that I could fit it in the attic. For example, the frequency of channel 2 is 57 MHz so the wavelength or the twin lead length is 5 meters. A yagi type antenna, the traditional TV type antenna mentioned earlier, can be a very high gain device, significantly amplifying a weak incoming signal. Works waaay better than the little whip I got with my old dongle and even better than the pizza pan planar disk in my attic Easy to Install and Use KM5M on 23rd Apr 2014 The NI4L end-fed 40-6m dipole antenna is just about perfect for portable operation. The higher the gain of the antennas, the smaller the vertical beamwidth is. If the stations are in the Green category, an indoor antenna may work, but an attic mounted antenna may be a better choice. Get a standard dipole antenna. Hi all, Due to HOA crankiness I have decided to install a couple antennas in my attic. This isolates the feed line shield from the antenna feed terminals. If you have a favorite band you want it to work best on, use the M0SBF Station Antennas. Hidden Attic Antenna -- From NU3E -- An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 40, and 80 Low Frequency Attic Loop antenna - from Bill Farmer W3CSW Attic Loop antennas - from William Hansgen After setting up the 40 meter dipole, I decided to add WARC band coverage to my antenna suite. With all segments connected, the 20 meter antenna will function as a 3/2 wavelength antenna on 20 meters. Need an inexpensive easy to construct compact 40 meter wire antenna that will fit in a 20 feet by 20 feet space? One that can be squeezed into a suitably sized attic? The antenna requires a good tuner, provides a useable SWR curve over most of the 40 meter band (7. Compromise refers to a house full of potential noise sources, as well as devices that can act as receivers or emitters of RF. Mac, AF4PS, FP –51 (Note: This was installed at a previous QTH) I will be the first (or millionth, remember, I’m from FL!) to affirm that the antenna is the determining factor for success when it comes to one’s station set-up. The length of the T's top section is cut to be a half wavelength of the TV station's broadcast frequency in meters (See Reference). Attic Antennas Are Go Last week, I stuck a RCS-8V remote switch in the attic, and ran some RG-213 and a CAT5 control cable down to the shack in the basement. Attic mounted antennas do not need to be grounded, only outdoor. Making a dipole antenna from off-the-shelf items that could easily be purchased from the local truck-stop (Travel America) and hardware store (Lowes) sounded great to me. Dipole bandwidth is a function of Attic (receiving) antenna We used to be warned the we should avoid placing a transmitting antenna in a loft or attic as there is a danger of interaction with domestic wiring and the transmission of interference. Comparing antenna gain to a half-wave dipole is common, and the gain is designated in decibels with the unit reference dBd (the last ‘d’ for ‘dipole’). 40/20/10 Meter Fan Dipole Attic Antenna by KD2GOE Read Full Article on http://www. The coax is connected at the bottom of the Balun. For listening purposes, a simple dipole fed with RG58/U coax will work fine. Installation was simple enough. Each of these antennas have their disadvantages. I got 2 watt carbon film resistors from eBay, and a 16/1 QRP balun. “Viewer request to try out an antenna for Ham Radio in the attic. You won't get the best signal possible, but at the same time, you won't have to worry about rust, lightening, or wind. Don't be discouraged if you are unable to put up a good outdoor antenna where you operate. It is possible to install a tuner in the attic and bring coaxial cable down from the antenna system to your station for a 1:1 SWR on all Bands. 12 meter and 17 meter dipoles were added to the 40 meter dipole. Rated 4 out of 5 by SiteRacknet from This antenna works excellent, atleast for the metro atlanta, ga area. To tune this antenna to resonance, I would climb up in the attic, short out turns of the slinky, and hang the antenna from steel hooks screwed into the roof joists. I strung up a 1/2 wave dipole for the 10 meter band. or when the antenna is very close or installed above radio room like in the attic or routed over the home. The attic won't quite support a 40m dipole, though I could bend it around some. K5ACL Video. I plan to fabricate an X-brace to try this design again. accommodated on a table top, hidden in an attic / roof loft, an outdoor porch, patio balcony of a high-rise apartment, rooftop, or any other tight space constrained location. Dipoles are balanced antennas and require no "grounding". The antenna is mounted in the attic on an antenna mounting pole and can rotate freely through about 270 degrees. com asking for suggestions on how to improve his reception. This is 45 feet long and homebrewed. there are alot of possibilities for a quicky or temporary antenna. I would suggest you don't use the 1/2 inch cpvc unless you plan on leaving it in the attic. net Abstract A coaxial-cable trap dipole antenna installed in the IF the C&P hyperlink from the search engine doesn't work; search for An attic coaxial dipole which will find it. QRP Fan Dipole The object of the exercise was to produce an aerial that would allow me to operate from 40 metres to 10 metres, specifically 40, 20, 17, 15 & 10 metres. attic antenna farming — specifically, the 3Cs: Compromise, Confusion and Cost. One leg of the antenna is basically straight, but the other leg had to do a bit of zig-zagging through the All you need to build this antenna is an inexpensive 20m dipole antenna, some rope and a tree limb that is about 38 feet or so from the ground. Inverted-Vee Antenna 10 15. Attic TV Antennas For the best performance, a TV antenna should be at the highest point possible and with a clear line of sight to the broadcast towers. Antenna can be depolyed in . hung dipole up in the attic using a nail at each end into the wood. Folded dipole antennas will work great if you do not have a metal roof. In my opinion, it's a work of art! All I did was make spacers out of 1/2" PVC tubing the wire is spaced 6" off center. com. This antenna consists of coax (RG58) or other 50 ohm type with the shield split at the center and the feedline attached to the open ends. A small but efficacious HF antenna for restricted space sites is the highly sort after Holy Dipole- In attic or garage roof? to get the antenna nearly as high as I can in the attic. A standard dipole antenna (the kind that sticks vertically up out of the back of a router) for example has roughly even coverage on a horizontal 2D plane around the antenna. The Alexloop is in a second floor room, it's a small loop antenna and very close to the ceiling. Viewer request to try out an antenna for Ham Radio in the attic. conveniently be accommodated on a table top, hidden in an attic / roof loft, an outdoor porch, patio balcony of a high-rise apartment, rooftop, or any other space constrained site. Is there another simple, cheap, DIY antenna I could try on my receiver? I know I'm going to want to hook it up and have a listen before the last solder joint has cooled. A shortwave listener, using an attic shortwave antenna, wrote HamRadioSecrets. The description he gave of his installation revealed several shortcomings that could easily be remedied. The blue area is the larger vaulted ceiling, and the light blue is a smaller vaulted ceiling. A good model in terms of size and reception is the commercially available Channel Master 4228. Hi Everyone! Thanks for all the past help. I have an omnidirectional Penatrator on a pole out in the back yard but was thinking about experimenting with a horizontal in the attic for a little DX. Many Hi-Fi tuners and other radios have input sockets that will accept the input from a coaxial feeder, and where no external antenna is used, a dipole antenna can provide an excellent solution. The 20 Meter dipole was already a bent dipole, with only 60% of the antenna horizontal, and the remaining wire bent 90 degrees downward following the support joists in the attic. An area should be chosen where it best works from the standpoint of SWR. Wire Antennas for Ham Radio 70 Antenna Ideas Iulian Rosu YO3DAC / VA3IUL, 13. I say that because I have no antenna measurements to back that up, just my own experience. This antenna is optimized for a single channel, though it will often work acceptably on others. The folded dipole is a loop antenna in the shape of a "T". The antenna was always going to be mounted in the attic as no external antennas are permitted at my QTH, the attic allows the antenna to 'beam' roughly northwest / southeast and A dipole in the attic of your home is a good idea if you have enough space in your attic to place one. The classic dipole is also called a balanced antenna because it is "fed" at its exact center. This is the type to look for. I use one in my attic. antennas in the attic AN MFJ-17758 80-and-40-meter TRAP DIPOLE IN THE ATTIC As the residence is on a 7000-foot (2133-meter) ridge, high winds and lightning are not uncommon. Vertical Dipole Anchors At Base Instead of installing the dipole horizontally, you install it vertically with one end about 2-3 ft off the ground use a rope (ideally with a pulley) to support the other The graph to the right shows roughly my planned layout of the antenna, with the double blue line representing the feed line, the orange being the longer dipole, and the green the shorter dipole. In-the-Attic = Usually means that the Wire Antenna Element is 12 Feet to 18 Feet High above AGL for a single story house. Dipole and loop antennas are the most common types of indoor antennas. ViewTV WA-2800 Digital Amplified Outdoor / Indoor Attic HDTV Antenna with Mounting Pole - 150 Miles Range Product - Able Signal Mount Mounting Pole Mast for Antenna Satellite J-mount Dish Outdoor Product Image HORIZONTAL LOOP ANTENNA CONSTRUCTION . The longer they are, the less directional they are, but I'm talking about 100 feet to be non-directional. This makes the new 20 meter dipole/inverted vee a 3/4 wavelength antenna for each side of the dipole/inverted vee. This magnetic loop antenna covers the HF band from 10-30 Mhz. I have yet another question on the never ending quest to get an antenna to fit in my attic. Base or mobile. Thanks David for the insulators - first to comment below & i'll send you an insulator in the mail The other HF antenna in the attic is a TFD, or terminated folded dipole. 6 The real difference is the middle of an antenna presents a low impedance (close to 50 Ohms for a 1/2wave dipole) while the end fed presents a higher impedance which is why you use a 9:1 unun to divide the antenna's impedance by 9. It currently rests in my attic with a vertical dipole for 2 meters, a Slim Jim and a three band dipole for 10, 15 and 20 meters. That is, the antenna's pattern describes how the antenna radiates energy out into space (or how it receives energy). The attic antenna would be a good two floors taller than the garage roof Antenna size limitations are solely dependent on the available room in the attic that allows rotation of the beam without hindering its rotation. The radiation pattern or antenna pattern is the graphical representation of the radiation properties of the antenna as a function of space. The first antenna I got was an Alpha Delta DX-EE dipole because it would fit in the space available. The Double Bazooka Dipole is a very efficient single band antenna which is very quiet and does not require the use of a balun. This antenna provides excellent reception of all digital TV broadcast signals. Log-in or register to view your pricing. A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF operation on the 10, 15, 20, 30, 40, and 80 meter amateur bands at a QTH with restrictive covenants that prohibit outside antennas. Above and below the antenna are weak points where signal reception won’t be as good. Just wondering if anyone has had good results with a dipole in the attic. It will not compete with a good high-gain directional antenna, but it sure beats rabbit ears. Designed and attic antenna FM-FD1. The Infamous Attic Dipole. Attic space makes installation of a 40 Meter or greater dipole next to impossible. The graph to the right shows roughly my planned layout of the antenna, with the double blue line representing the feed line, the orange being the longer dipole, and the green the shorter dipole. Thus, in this limited attic space I now have 6 operating HF bands and instant band switching! One area in which dipole antennas are often used is for the reception of VHF FM broadcasts. Stealth Antennas by Steve Nichols, G0KYA When I was first licensed I strung up a half-wave dipole for 10m in my attic. 6 out of 5 by 73. Shop antennas in the antennas & tuners section of Lowes. 5 million maintenance, repair & operations (MRO) products. Using the CQ Antennas Center Insulators from KE5FEN. What's more? Plus, this is the perfect outdoor antenna if you prefer streaming content from any device, including your laptop or console. Hi - I need to receive VHF TV (channels 6,7,9,13) and would like to make a super-duper antenna for inside my attic. The easiest way to improve your FM reception is to build an indoor FM antenna, instead of using your FM stereo’s internal FM antenna. 6 At home in my attic it seems to performs as well as my own 20M half wave dipole, anecdotally. Also, a large pile of 'stuff' in the attic in front of the antenna can be a problem, metal appliances, metal venetian blinds, metal anything, can reflect/block signal from reaching your antenna. Supposedly something like 2/3 of your signal is radiated from the inner 1/3 of the dipole (for a 40m antenna, the first 10' on either side of the feedpoint) so keep that part as straight as you can, then start zigging and zagging Even with my 2-40 dipole in the attic, I run string through the entire antenna so that I can adjust it in both length and spacing. The GE 33692 Attic Mount HD Antenna comes with a compact design to get high-quality reception of your favorite HDTV programming. After a while I wanted more. The Horizontal Loop, also known as the Loop Skywire Antenna, is an old but very effective design. The half-wave dipole is a simple Hidden attic dipole antenna installation ve3bux dx ering multi band dipole antennas dxe wa 135 shipping wire antennas ale antennas for hf automatic link elishment Antenna gain is defined in comparison to a reference antenna. For example, you can install a wire dipole in almost any attic space. Attic Installation Tips. continuously. 66' Dipole ready for the attic!Over the 3 day weekend I finally squeezed in some time to get my 66 foot ladder fed dipole up in the attic. This indoor FM antenna is easy to build, and cheap. com in 2 categories. A television antenna, or TV aerial, is an antenna specifically designed for the reception of over-the-air broadcast television signals, which are transmitted at frequencies from about 41 to 250 MHz in the VHF band, and 470 to 960 MHz in the UHF band in different countries. Cost of antenna is SWR at anywhere beside the resonant point of the antenna. TV antennas installed in the attic space can and do work very well. 1, 14 & 21 Mhz Bands; An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF operation on the 10, 15, 20, 30, 40, and 80 meter amateur bands at a QTH with restrictive covenants that prohibit outside antennas. If you live in a space restricted location or are under a HOA restriction, you may be able to mount an antenna outside. If you don't have a metal roof, consider mounting the antenna in your attic. Supposedly something like 2/3 of your signal is radiated from the inner 1/3 of the dipole (for a 40m antenna, the first 10' on either side of the feedpoint) so keep that part as straight as you can, then start zigging and zagging It's the Off-Center-Fed-Dipole that WORKS!™ Attic and Stealth Antennas Antenna that are optimized for installations in attics or similar locations at low heights above ground Shop for Dipole Antenna at Grainger. It got us on the air but absolutely sucked when compared to simple outside antennas. No matter what type of antenna or antenna system you need, you’ll find it at DX Engineering. Plus, with it mounted in my attic, it would be the perfect "stealth" antenna to keep the homeowners assocation happy. An attic antenna isn't going to attract lightning anymore than the usual stuff found in the attic such as AC ducts, electrical wiring, CATV, phone, etc. As the Channel Master is about 3' high and 39-1/2" wide, you will want to build an antenna that is approximately 6' high and 78" wide. Find quality antennas online or in store. Contesting and DX Antennas for Restricted Lots outside or attic mounted • Will cover 40-10M antennas 20M 1/2 Wave Sloping Dipole as a Multiband Antenna RF interference in the home is common with any antenna without proper Current BALUN, like Dipoles, OCF dipole antennas, G5RV, ZS6BKW etc. I would have thought that I could FM Dipole. WHY THE MULTIBAND HF FAN DIPOLE IS THE RIGHT CHOICE, IF YOU CAN ONLY PUT UP ONE ANTENNA. I would like to set up an antenna for 40m and 80m if possible. So N9PO is back on the air from 40m-2m with attic antennas Attics are great locations for indoor antennas. The NU3E Attic Coaxial-Cable Trap Dipole For some time now, I have been wanting to get back on the air with a reasonable selection of HF bands. the dipole is in the attic, this means a wooden roof above, rafters all over and insulation below. It is installed in my attic at about 16 feet above ground. So I got creative and strung a single band dipole in my attic. If you can get a bit more wire up in your attic than I am able to hang, the open loop might perform as a folded dipole on 80 meters or lower. I was looking for an antenna design for a repeater antenna. A small but efficacious HF antenna for restricted space sites is the highly sort after Holy Grail of Using our new Dipole Antenna Kit. It gave me 40, 20 and 15 with a push because although a 40 meter dipole should give you a resonant 15 meter antenna, in this case – with the coils for 40 – it mucked the maths up and caused the ATU some trouble. A dipole in the attic of your home is a good idea if you have enough space in your attic to place one. Designed specifically for FM reception, these look like TV antennas and are usually installed on a roof, on the sides of buildings or in an attic. At home in my attic it seems to performs as well as my own 20M half wave dipole, anecdotally. The feed impedance is of particular importance along with knowing the best way of feeding a dipole antenna. Ladder line fed Dipole in attic Some local QRP folks known as the Knightlites meet regularly on 3. Maximize your signal and minimize noise with antenna accessories such as antenna switches, vertical add-on kits, variable phasing controllers, baluns, radial and tilt base plates, preamplifiers, and more. Some people are now picking up dozens of TV stations in crystal clear HD, with items they have in their kitchen By making some simple modifications to the wire geometry generated by MOXGEN, it is possible to configure a 6 meter antenna that produces a “dipole like” horizontal radiation pattern with good gain at a relatively low “take-off” angle. I will bring the cable from it out through a vent and down the side of my house, go through the h (Page 2) For a dipole the induced According to Patrick Hock, an attic fan dipole antenna covering the 20 and 40 meter bands can be made if you're willing to install the antenna in an attic and can spend some time pruning the antenna for the best SWR on each band. worldwidedx. While you have the legal right to erect an antenna on property you either own or control, many people will still install antennas in attics for aesthetic reasons. The Sky HDTV Attic / Outdoor Antenna is the newest addition to the Mohu family and offers a completely new take on the traditional rooftop or attic mounted antenna. I generally ground antennas in attics too. Your station has specific requirements that may not match mine. Attic antennas can work better than you might think, some of mine work as well as their outside counterparts (no I'm not comparing to a 150ft tower & big yagis). A project which I’ve been meaning to complete for a very long time is to place a dipole antenna in the attic space of our house. Grounding bleeds off static charge from air passing over antenna - not an issue with attic mounted antennas. In most cases, an attic installation is the easiest, fastest, most economical, and most convenient installation, other than using an indoor antenna. Sloping Dipole Antenna 11 How to make a loop antenna for 40m and 80m bands I’ve been an addict of full wave (and partial wave) loops since realising many years ago that in comparison to a dipole, you get more bang for your buck if you build a loop – certainly you get more copper in the air – and loops are resonant on EVERY harmonic so a 40m loop will be resonant 25 yrs ago I had a 20 meter dipole a 10 meter dipole ,a 10 meter wire ground plane , a scanner antenna and 2 two meter ground planes in my parents attic it was a full floor attic 16 ft from floor to peak. It is quite simple and an effective solution to mount your Pennyloop antenna. It's the Off-Center-Fed-Dipole that WORKS!™ Attic and Stealth Antennas Antenna that are optimized for installations in attics or similar locations at low heights above ground The easiest way to improve your FM reception is to build an indoor FM antenna, instead of using your FM stereo’s internal FM antenna. You may choose to mount the antenna inside, or in an attic, or mount the antenna on an outside mast. 1 I decided to go with a 40 through 10 meter trap dipole. It is an hdtv antenna that roughly looks like an alligator's mouth with three sections of aluminum poles mounted with aluminum tubes at 90 degree angles. Feeding a dipole off-center makes the feed-line act as part of the antenna (unbalanced load), thus it will pick up even more EMI on the feed-line. Dipole bandwidth is a function of Some research into indoor antennas in The ARRL Antenna Book provided encouragement about their use and since this house has easy attic access, I thought I’d give an attic antenna a try. During the late 1980's I worked up the design for these dipoles during a vacation week at home. The dipole antenna is immediately recognizable when we talk about rabbit ears , which always seem to need adjusting. Both antennas are fed just like a dipole, two seperate #10 gage wires connect to each antenna and on each side of the current Balun. Within the past two weeks we had 4 residential fires caused by direct lightning strikes in the immediate area, none were attributed to antenna installations. Part 1 shows the antenna placement in the attic and basic construction. Thanks David for the insulators – first to comment below & i’ll send you an insulator in the mail Dipole Antennas Do not forget the dipole antenna for a single and multi-band use. The antenna was always going to be mounted in the attic as no external antennas are permitted at my QTH, the attic allows the antenna to 'beam' roughly northwest / southeast and A New Jersey radio amateur and Military Auxiliary Radio System (MARS) member has received a Lifetime Achievement Award from President Donald Trump. Design Goals and Objective: Construct a compact, 20 meter rotatable dipole antenna of durable weather worthy components supported at a single point obviating the need for multiple supports and multiple support ropes The current balun does the same job it does in a dipole, ensuring the counterpoise and antenna terminal share equal and opposite currents. To check the attic for the maximum size antenna, the hobbyist must first enter the attic and measure the distances in the area planned for the set-up. However under a number of circumstances a modification of the basic dipole, known as a folded dipole antenna provides a number of advantages. Don’t worry if you lack the room to run the dipole in a straight line. ALE Antennas for Automatic Link Establishment - HFLINK is the international resource for ALE Automatic Link Establishment High Frequency Communications, HF Digital Messaging, Emergency / Disaster Relief, Interoperative HF Communications, HF Network, Ham Radio. com : Space permitting, the attic is an excellent location for an antenna. The real difference is the middle of an antenna presents a low impedance (close to 50 Ohms for a 1/2wave dipole) while the end fed presents a higher impedance which is why you use a 9:1 unun to divide the antenna's impedance by 9. I loved in a condo when I got active again and couldn't have ANY antennas out side. I’m using an Icom 745 (100 watts) and a Drake MN2000 tuner. So N9PO is back on the air from 40m-2m with attic antennas Mounting ham radio antennas in the attic. Antenna gain is defined in comparison to a reference antenna. I decided to install an 40 meter dipole in my attic space which is about 25 by 45 feet, and about 25 feet up from the ground. 574MHz They meet on 80m so that nearby folks can participate via skywave effect of 80m. Slinkys are made from spring steel, very far from being a good antenna material. About this same time, I came across John's article on HamUniverse. How to make a loop antenna for 40m and 80m bands I’ve been an addict of full wave (and partial wave) loops since realising many years ago that in comparison to a dipole, you get more bang for your buck if you build a loop – certainly you get more copper in the air – and loops are resonant on EVERY harmonic so a 40m loop will be resonant The folded dipole is a loop antenna in the shape of a "T". An effective radiator since the beginning of the hobby, this antenna is really just a dipole, as described above, but fed with open-wire feedline, ladder line, or window line—feedline in which the two conductors are kept the same distance apart from antenna to shack. THE ROCKLOOP A Compact Antenna for 10. For the ones who get it done! An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF operation on the 10, 15, 20, 30, 40, and 80 meter amateur bands. FM Dipole. Transmitting or receiving. I have the opportunity to put a few antennas set up in the attic including a cb one (can't install on the roof as its too dangerous). 3 MHz), and has a good radiation pattern and gain at a height of 25 feet. Imagine the radiation pattern of an isotropic antenna as a balloon, which extends from the antenna equally in all directions. If your desired channels are in the Red category, an attic mounted antenna may work, but a small outside antenna would be recommended. I am sure that trying different feed points may make a difference. Re: Attic Dipole Post by 443 Arizona » Saturday, 24 September 2016, 19:10 PM BMWED, your dipole swr will be fine if you are making it 1/4 or 1/2 wave. Multiband Dipole Antenna 10 14. I have the dipole in the attic both for asthetics, and lightning protection (but mainly my wife). For example, an FM antenna with an advertised gain of 3 dB will deliver to your FM Reference approximately twice the power compared to a standard half-wave dipole. Again, after connecting the antenna to your receiver, orient it until you get the best reception. The loop antenna is so named due to its construction of looped wire or tubing with its ends connected to a balanced transmission line . Vertical or directional. I've decided to try a fan dipole in my 46 foot attic before I try a slinky antenna. While an exterior mast mounted ground plane or dipole antenna is able to radiate into free space, the indoor antenna is surrounded by obstructions that tend to interfere with its ability to be tuned. 25 yrs ago I had a 20 meter dipole a 10 meter dipole ,a 10 meter wire ground plane , a scanner antenna and 2 two meter ground planes in my parents attic it was a full floor attic 16 ft from floor to peak. I am currently using an Alpha Delta DX-EE parallel dipole for the 40, 20, 15, and 10 meter bands with rather great success. According to Patrick Hock, an attic fan dipole antenna covering the 20 and 40 meter bands can be made if you're willing to install the antenna in an attic and can spend some time pruning the antenna for the best SWR on each band. A better solution is to get 50-100 feet of wire outdoors, as far from consumer electronics as possible. The attic was in a 5 story building, long enough for a 160m dipole. Antennas. Thanks again for your ideas! For a dipole, should I just connect both ends of the dipole to the center wire of the coax in the attic and then the center wire to the small plug to go into the radio. The antennas are in the attic? I'd look for a way to run the feedlines indoors as well. There are a few conditions however that can prohibit an attic installation. A small but efficacious HF antenna for restricted space sites is the highly sort after Holy Grail of Contesting and DX Antennas for Restricted Lots outside or attic mounted • Will cover 40-10M antennas 20M 1/2 Wave Sloping Dipole as a Multiband Antenna When referring to an FM antenna, gain is most often referenced to a standard half-wave dipole, such as a simple flat twin-lead antenna. 0 MHz – 7. The fan dipole is a multiband 1/2 wave HF dipole antenna with multiple elements for different bands, using the same 50 ohm center feedpoint. Well my 40m Windom loads up very poorly on 80m and I'm likely burning a good bit of my meager power heating the coax. These include an attic Inverted V dipole for 20m and an HF Ground Plane for 10m, both of which are ideal for limited space installation or for a property with restrictive covenants on the use of outdoor antennas. In 1953, Marvin Middlemark invented the dipole antenna, also known as Rabbit Ears. ATTIC/OUTDOOR COMPACT DESIGN HD ANTENNA User’s Guide Repeat with the other VHF dipole on the Insert the J-pole antenna mast into the opening on the antenna Indoor Stealth Antennas Indoor antennas may work very poorly if your home has aluminum siding, a metal roof, steel construction, or foil-lined insulation. A folded dipole is an efficient TV antenna that is easy to construct. Covers from 10 to 80 meters . Two 1/4 wave ham sticks in a dipole configuration produce a 1/2 wave dipole antenna. A vertical dipole is an uncommon antenna because it's taller than most and because it either requires a sideways bit sticking out or An Attic Coaxial-Cable trap dipole for 10, 15, 20, 30, 40, and 80 meters The 40 meter Stealth Vertical Vertical antenna for 40 meters band Stealth Multiband Vertical A vertical antenna for 40 and 80 meters band, using a telescoping fiberglass fishing pole. As regards your indoor antenna- I am in a very similar situation, and my solution was to construct what I call a “Spiral Dipole” in my attic. Monoband or multi-band. The folded dipole antenna or folded dipole aerial is widely used, not only on its own, but also as the Antenna Construction Supplies : Baluns, Ununs & Transformers Unadilla W2AU 40/80 Dipole Antenna Kit: Stellar Labs Loft-Attic Antenna Mount: Antenna pattern. If you want it to work properly, you will need a means of measuring SWR, some trial and error, a little patience and at least half-a-brain to build this. Often, amateur radio operators are looking for alternative locations to install their antennas. This will provide me a means of reaching out to the world while I save my pennies and look for a good deal on a multi-band Yagi-Uda HF antenna (and possibly a different tower too). The first antenna was a simple Zigzag dipole which I fastened to the roof spars using electric fence insulators. There are many choices for hf antennas. Cobb 5 band antenna simple multi band hf vertical this antenna has served me very well as i was able to get qrp with it however m not one leave enough alone attic fan ATTIC/OUTDOOR COMPACT DESIGN HD ANTENNA User’s Guide Repeat with the other VHF dipole on the Insert the J-pole antenna mast into the opening on the antenna The Dipole vs Indoor Magnetic Loop Antenna May 12, 2017 Julian OH8STN Ham Radio 0 These days it seems like everyone and their mother is attacking the very popular, small, lightweight, and extremely portable, magnetic loop antenna. My vertical in the shack has nylon string through it too. The basic concept is this; starting at the center of the attic at floor level, I hung two runs of 2-conductor wire from the roof joists, using wood screw type standoffs designed for 300-ohm twinlead 80m was my entire reason for getting this antenna, as my previous attempt to shoehorn a radiator for this band into my tiny attic - a Slinky dipole - had been disappointing. The best AM antenna is like the attic ones described, technically termed a long-wire antenna. Attic/Outdoor Compact Design HDTV Antenna is rated 4. For the most common type of antenna, the dipole, the high voltage point is the ends of the antenna. And at roughly 30Kv/inch, it does not take much of a gap to guarantee no spark could ever be created. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters John DeGood, NU3E nu3e@arrl. Years ago, back in high school, I had a "Slinky Dipole" in my parents attic. On this band the 80plus2 functions as a loaded dipole, with a claimed usable bandwidth of 70kHz. Although this design has been around for a long time, it is only gaining popularity now due to the recent improvement in high power antenna tuners. This is a very light weight dipole antenna designed for QRP work. Over 1. The switch has five ports (plus the common feed port), so there is lots of room for experimentation. The Alexloop vs my attic dipole The new Alexloop antenna Just over 2 weeks ago I placed an order for the Alexloop, For some time I have been debating what antenna to use when I was out and about with my KX3. Buckmaster 7-Band 300 Watt OCF Dipole Antenna (Click for larger image) Our 7-Band antennas cover 80, 40, 20, 17, 12, 10, and 6 meters , with no tuner required! Wire antennas are a great simple way to work 40M and 80M rather than a noisy vertical antenna that requires horizontal radials. Over a period of several months prior to the completion of my attic antenna suite I operated with a borrowed AEA Isoloop antenna. I have a UHF/VHF antenna in my attic. Not having the courage to provoke the neighbors by mounting a 5-element multiband beam on a huge mast, I have a selection of wire antennas shoehorned into the attic. The half-wave ham radio dipole is also the most common antenna used by amateur radio operators throughout the world. 2 meter and 70 cm antennas are necessarily "short" and therefore won't pick up as much energy from a nearby strike as would, say, an 80 meter dipole. I use a mixture of commercial ham radio antennas and space saving home brew indoor wire dipoles for the HF bands. Antenna for a cramped attic. My Favorite 40m "DX" Antenna NOTE: This is not a plug-n-play antenna. Tune CB Radio dipole VSWR Instead of cutting the dipole wire for best VSWR, I folded it over at each end until the VSWR was minimum at channel 20. Below you will find a how-to description to build the prototype Pennyloop mast mount. If the antenna is a loop, one wire goes to receiver ground and the other to receiver AM antenna input. Here is my setup. The first thing you must determine is if the attic is suitable for good TV reception. The other HF antenna in the attic is a TFD, or terminated folded dipole. When running as a folded dipole the noise floor is more reasonable - in the range of S-3 to S-5. Thanks David for the insulators - first to comment below & i'll send you an insulator in the mail Choosing the Best TV Antenna and Accessories for your Attic Installation. Roofspace Antennas How to build a roofspace Page 4 PRB-1 Historical Background (Editorial Comment) At the time of this writing, the legal situation of amateur antenna installation is very much in a quandary On the one hand, our CCR's This is my attic 40/20/10 meter fan dipole that I installed in my attic today. Reply ↓ kv5r on April 24, 2017 at 10:50 PM said: diagram, an antenna rotator is required for maximum antenna gain in a specific direction. RF interference in the home is common with any antenna without proper Current BALUN, like Dipoles, OCF dipole antennas, G5RV, ZS6BKW etc. Currently I have a 40 meter dipole strung from one end of the attic to the other. By matching the feed impedance Now I hadn’t made a dipole antenna since I was 15 years old and hadn’t even really considered that as an option, but after reading about different dipole configurations I started to realize that it was the perfect antenna for my problematic situation. It lets me adjust the height by simply looping string around any loop of the Slinky. Very light weight antenna for SOTA work or low visual installation setup. To ensure the optimum transfer of energy from the feeder, or source / load, the dipole antenna feed impedance should be the same as that of the source or load. One area in which dipole antennas are often used is for the reception of VHF FM broadcasts. Some people are now picking up dozens of TV stations in crystal clear HD, with items they have in their kitchen My 40m dipole is all wavy / zigzagged to take up the length (we're talking an attic that's like 25 feet end to end). com describing a dipole antenna he made using mobile fiberglass type CB antennas. After doing some research, I learned that a dipole antenna mounted in my attic might do the trick. We tried fan dipoles, folded dipoles and even full size loops. 24792-1 Attic Mount Antenna Installation Guide Thank you for purchasing the GE Attic Mount Antenna. The main category is 30 meter antennas that is about Antenna Projects for the 10 MHz - 30 meter Band. About Attic 30 m dipole antenna The resource is currently listed in dxzone. The RF losses are fairly low in wood and most roofing at HF & VHF, most of problem comes from interaction with electrical wiring and Attic dipole antenna constructed of 12ga braided wire, a DX Engineering 1:1 balun, DX Engineering dipole mounting kit. I too, have been using attic antennas for some time now. attic dipole antenna