Driving down the highway at 70mph and it wont even budge. Coaxial cable stick one end of the copper wire into the coaxial cable port on the back of the hdtv, wrap the other end of the wire around a cardboard tube, and place the tube in a window. Ive seen some small ones with pvc pipe just wondering what is inside that pipe and how to make one to achieve the best range. Calderon, du1anv makiling amateur radio society mars way back in 1987, i was at the zurich airport, switzerland, waiting for my plane ride back to the philippines after attending our yearly conference. An interesting application note about wlan discones 2. When the antenna was used with a pocket scanner, excellent reception results were obtained on 860 and 935 mhz commercial signals, much better than the 8inch rubber ducky original equipment.
The world of electronics, antennas and scanner radios can be a new realm of exploration and fun. What is the best way to make a scanner antenna for indoor use possibly outdoor. A slim jim also makes an excellent scanner antenna. Connecting an outdoor antenna to connect an external antenna, follow the installation instructions supplied with the antenna. A vhf marine antenna gets its name because it is used to broadcast transmissions from water. Carr this paper shows you how to make the connection from the antenna to your receiver. Both types of coax look similar to each other but the only correct type of cable to use for an aircraft installation is 50 be very careful with the type of coax you use as it can damage the radio if you have the wrong type. This is a simple but sensitive home made jpole antenna that works great when you are limited as to a place to mount an external antenna. In addition, specific models mentioned in the antennas forum at radioreference are linked here for future reference if youre a newcomer or old hat, or anywhere in between, when installing antennas, safety first. Although there may be other types of connectors than those covered, the connections discussed below represent the largest percentage.
Building an antenna is educational, and having a scanner radio antenna will allow you to keep up with local alerts, crime, and emergencies. Therefore this type of antenna is commonly used in boats. Ham radio satellite antenna simple, inexpensive and lots of fun. To get started with your ham radio license process, youll likely want to find a class or book to dig into and then take your test. The two elements can be either solid or composed of separate elements. Reddit user soooooil has posted a series of images showing his home made discone antenna made out of wire coat hangers and designed for a minimum frequency of mhz. How to build several easy antennas for amateur radio. The diy scanner discone my first two meter antenna was a piece of 19 inch coathanger wire witha pl 259 connector mf on a magnet attached to a old audio level instrument box for a ground. The arrl makes a antenna book with lots of great suggestions to homebrew wire antennas. Beginners guide to ham radio, make your own eagle blog.
Dummies guide to aircraft antennas cumulus soaring. I am also a ham radio operator, so i use my 2m440 antenna which works ok, but is not really tuned for scanner use. You can use it to receive and transmit a wide range of signals, including amateur radio, aircraft and other special services, on your scanner or other receiver. I live in a fringe area about 20m out of town, so a dual band jpole is a must. Listening to the radio is a favorite pastime for many, besides the millions of others who love to have some music on, no matter what they are doing the whole day long. Vhf uhf antenna basics diy antennas from surplus 800mhz antennas for 2m 70cm and dual band duration. How to make your own police scanner antenna our pastimes. Vhf and uhf antenna systems 1821 fig23these drawings illustrate the dimensions for the 144mhz groundplane antenna. Connect one end of each cut wire to one side of a piece of choc block and to the other sides connect the core and. The antenna is composed of a disc shaped radiator on top of a cone shaped ground plane. Now is there a difference in reseption if i raise the antenna partway say 17 or so inches verses all the way up. Sirio antenna sd2000n 100 mhz2 ghz discone wide band antenna.
Easy external scanner antenna for police, fire, ems youtube. Excellent antenna for your scanner if you monitor 700mhz and above, i do suggest that you use lmr400 and put it up 30ft or higher. Scanner antenna ham radio, ham radio equipment, ham. How much better range can i achieve with an external antenna. Use 50ohm coaxial cable to connect your scanner to the outdoor antenna. Doublet multiband antenna that is not resonant on a particular band. Dipole antennas often are the easiest to build, and then turned into inverted v antennas by raising the center of the antennas up into the inverted v style. Attach the coaxial cable to the so239 on one end and the other to the scanner. Building antennas has long been one of easiest ways to experiment with scanner radios. Hi guys, i have a radioshack base model scanner and a separate radioshack antenna that hooks on to the rear of the unit. Sometimes, there might be interruptions while broadcasting radio programs. Five 18inch stainless steel or copper rods 25 inches each needle nose pliers. Great article on scanners and antennas for a scanner. Insert the antenna in the hole on the top of the scanner.
Using a string, hang the antenna from an outdoor eave or inside the attic. Make sure the connector type of the antenna matches the connector on the police scanner all scanners have either an sma female or bnc female connector or buy an adapter. Build a simple vhfuhf scanner antenna a police scanner. Typically, a high gain antenna is designed in the computer, then you try to come up with a matching arrangement for a 31. Hamradio 360 has a great list of study materials for you to start with. So much has been written on homemade ham radio antennas that it would be a shame not to point you to some of the best sources of articles on the subject because many ham radio operators, all over the world, like to experiment with homemade antennas, i felt i should share with you here my favorite sources of information for the antenna home brewing enthusiast. How to increase the range of a radio scanner jpole antenna. A discone antenna is a version of a biconical antenna in which one of the cones is replaced by a disc.
The scanner is weak, but with this antenna it boosted its receiving abilities 10 fold. If you have a little free time on your hands and are interested in a project, you can actually make your own antenna. I will show you how to build a complete discone antenna with just materials from home depot and radioshack in one afternoon for about 100 to 150 dollars. This discone scanner and ham base station antenna is our most efficient omnidirectional antenna system, combining a disc an tenna with electrically matched radiators. This guide will teach you how to make a durable discone antenna aimed at the rtlsdr crowd. How to build a multiband scanner antenna our pastimes. Here is an easy to make home brew antenna that can get you on the air working satellites or be built for use as a portable. Log periodic antennas wide band, high gain, low vswr small size, light weight, easy assembly cd model clp5x series is a high gain, wide band vhf and uhf log periodic type beam antenna. Wire antennas for ham radio sun country amateur radio. One conical antenna, long popular among scanner hobbyists, the discone, has been described in previous articles in amateur radio magazines and books. An antenna constructed from separate elements is lighter and more cost effective to construct. Handheld police scanner antenna good to knows some handheld antennas have an adjustable elbow that allows the antenna to be vertical or horizontal. A discone is a good general antenna for the rtlsdr as they are extremely wideband, and can be expected to be useful over almost the entire.
Once you know your stuff, youll want to look for a local club in your area for a testing session. A discone antenna derives its name from its unique appearance. Manufacturer mp antenna product the mp antenna superm classic base was designed for amateur radio and scanner applications and seamlessly covers a frequency range from 25 mhz to 1. Groundplane antennas for 144, 222 and 440mhz for the fm operator living in the primary coverage area of a repeate r, the ease of construction and low cost of a 14. You can build this groundplane design for 146, 223 or 440 mhz. Professor, department of ece, k l university 2student, b. The model that john used the gh0n should be able to pick up digital hdtv channels that youre within range of, and works better with uhf or ultra high frequency channels channels 1451 than vhf or very high. Build the slim jim antenna a unique vhf antenna with gain over a jpole jose i. In order to avoid such interruptions, learn how to make a homemade fm radio antenna all by yourself. A guide to homemade fm radio antenna for all the radio. The formula to calculate the length of the antenna is 147frequency in mhz, this gives the total length of the dipole in metres. The antenna can be mounted pretty much anywhere, but you do need to make sure its facing the right direction to pick up any stations. As a standard, the antenna is designed for horizontally polarized base station use but by means of an adapter, vertical polarization is also possible. Its a good idea to have your antenna at least one half 12 wavelength of the antenna.