Ham Radio Antenna
Ham Radio Antenna
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Cables To Go CABLES TO GO 25FT WI-FI M/M N-TYPE CABLE [Office Product] $34.95 Ultra Low Loss Cable is designed to transmit the maximum signal to your antennas. 1/2 inch LMR-400 cable by Times Microwave USA meets Military Specifications with silver foil and silver coated copper conductors for less signal loss in runs up to 200 feet.. In this high quality cable, the dimensions and spacing of the conductors are uniform. Any abrupt change in the spacing of the two conductors al... |
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HAM Radio During World War 2: The Voice of Victory (1944) [DVD] $9.99 Voice of Victory describes the design and construction of Hallicrafters Radio transmitters and receivers and explains how these radios aided our soldiers and allies in World War II. This was a very heavy (and expensive) radio and the first part of the film explores the extensive planning and testing by amateur HAM radio operators that it took to introduce the device to the war front. The second p... |
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2 pack Cobra 650mAh 7.4V FRS and GMRS Battery $29.98 %section%%title2%Comes with 2 Batteries%/title2% %/section% %section%FRS stands for Family Radio Service. GMRS stands for Ground Mobile Radio Service. They both use frequencies in the 462-468MHz range. There are many 2-way radios now which are both FRS and GMRS. What's the difference? The FRS service is fairly new, authorized for use in the U.S. in 1996 based on a petition to the FCC from radio ma... |
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World's Smallest Walkie Talkies $6.49 The World's Smallest Walkie Talkies are ideal for your little investigators. Kid-sized yet totally high-tech, these walkie talkies can be used to talk or to exchange morse code (instructions included), depending on just how secretive they want to be! With the power to penetrate walls, floors, steel, and even concrete, these kids walkie talkie radios have a range up to 150 feet. Antennas are flexib... |
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BLMA Models HO Scale Kit Radio Tower w/Antennas $35.99 HO KIT Radio Tower w/AntennasBlma ModelsPart BLM4101... |
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Midland 75-822 40 Channel CB-Way Radio $74.99 Handheld Mobile CB w/ Adapter. - Midland handlheld mobile CB with adapter- Lightweight handheld CB radio that can be easily converted to a mobile CB- For portable: insert batteries into battery pack and attach flexible antenna- For mobile: replace the battery pack with the silde-on auto adapter, plug into your vehicle's cigarette lighter and attach an external antenna- Squelch control- On/off volu... |
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Uniden BC355C 800MHz 300-Channel Base Mobile Scanner (Black) $86.99 The BC355C is an affordable, basic mobile scanner that's great for home or mobile use, with 300 storable channels, coverage of all the "action" bands, convenient features like "close call" and program lock, and a wealth of powering options for different applications. An affordable, basic mobile scanner that's great for home or mobile use. Affordable Base / Mobile Scanning Scannin... |
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Handheld VHF & 2 Meter Amateur Radio Tranceiver 5watt, TYT TH-F5 Ham Radio $78.50 VHF & 2 meter Handheld 5W transceiver, 136-174Mhz . Direct Keypad Freq & function entry. 128 AlphaNumeric memory channels, Scan modes, PL & DPL (ctcss/dcs), selectable step rates & repeater shift. Has regular Amateur SMA antenna jack, & a "Kenwood Style" 2-pin speakermike jack, for compatibility w/ many aftermarket accessories. Optional PC programming cable available.. 5W / 2W / 1W Output setti... |
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Ham Radio For Dummies $12.79 Itâs time we cleared the air about ham radio. If you think of it as staticky transmissions sent by people in the middle of nowhere, think again. Todayâs ham radio goes beyond wireless to extreme wireless, Operators transmit data and pictures, use the Internet, laser, and microwave transmitters, and travel to places high and low to make contact. In an emergency or natural disaster, ham ra... |
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ARRL Handbook for Radio Communications 2012 softcover $33.42 ... |
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ARRL's Wire Antenna Classics $9.40 -- A collection of the best articles from ARRL publicationsSo many wire antenna designs have proven to be first class performers! Here is an entire book devoted to wire antennas, from the simple to the complex. Includes articles on dipoles, loops, rhombics, wire beams and receive antennas and some time-proven classics! An ideal book for Field Day planners or the next wire antenna project at your h... |
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NEW BAOFENG UV-5R VHF/ UHF DUAL-BAND TWO WAY RADIO $62.95 This BAOFENG UV-5R transceiver is a micro-miniature multiband FM transceiver with extensive receive frequency coverage, providing local-area two-way amateur communications along with unmatched monitoring capability. Frequency Range: 65-108MHz(FM Receive only) 136-174MHZ and 400-480HZ (TX/RX) |
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Midland XT511 22-Channel FRS/GMRS Two-Way Emergency Crank Radio $89.99 The Midland Base Camp Radio combines the emergency power of a Dynamo Crank with GMRS 2-way radio technology. The XT511 includes AM/FM radio, All Hazards Weather Alert radio, clock with alarm and an LED flashlight to make it the most versatile product of its kind. Ideal for hiking or camping enthusiasts because of its precautionary tool for any emergency situation. The 2-way radio lets users commun... |
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Solarcon I-MAX 2000 CB/Ham Radio Base Station Vertical Antenna - 24' $99.18 Solarcon IMAX-2000 24ft Omni-Directional Fiberglass Base Station Antenna 5000 Watts.... |
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valley-ent.com Yaesu USB CT-62 CAT Cable FT-100 FT-817 FT-897 FT-857 FTDI Chipset Supports Windows 7 64bit $27.77 Supports: Windows 2000, Windows XP (All), Windows Server 2003, Windows Vista (All) , Windows Server 2008, Windows 7 (All), Windows Server 2008 R2, Linux and Mac OS X. Link provided to download drivers from FTDI website. No programming software included. Works with Yaesu: FT-100, FT-817, FT-857, FT-897, FT-100D, FT-817ND, FT-857D, and FT-897D. FTDI Chipset, Manufacturer Technical Support and Warra... |
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Coaxial Lightning Antenna Surge Protector for Amateur, Ham, CB & Two-Way Radio - LP-350 $29.99 Inline Coaxial lightning surge Protector installs inline with Coax antenna cable of Ham Radios, CB, commercial & two way radio antennas. For Transceivers up to 350W, 0-600Mhz. SO-239 connectors.... |
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Uniden BC-95XLT NASCAR Bearcat 200-Channel Portable Scanner $119.99 UNIDEN BC95XLTB NASCAR 200-CHANNEL COMPACT SCANNER WITH 800 MHZFULLY PROGRAMMABLE ; HANDHELD WITH 200 CHANNELS & 13 BANDS;CLOSE CALL RF CAPTURE TECHNOLOGY; FEATURES FULL FREQUENCY LCD DISPLAY, PAGER SCREEN, CHAIN SEARCH, SCAN DELAY, SERVICE SEARCH & BACKLIT DISPLAY; 3.5MM HEADPHONE JACK; COVERAGE: 25 MHZ54 MHZ & 108 MHZ174 MHZ; REQUIRES 2 AA ALKALINE OR RECHARGEABLE BATTERIES; INCLUDES BELT CLIP &... |
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I Support Antenna Farm Subsidies Ash Grey T-Shir Ham radio Light T-Shirt by CafePress $29.50 Hams love antennas, and a yard full of antennas is an antenna farm. Ham radio Tee, TShirt, Shirt. About our Light T-Shirt: Look cool without breaking the bank. Our durable, high-quality, pre-shrunk 100% cotton t-shirt is what to wear when you want to go comfortably casual. Preshrunk, durable and guaranteed.5.6 oz. 100% cotton. Standard fit..... |
Why are small ham radio antennae shaped like a satellites?
Does it help to make antennae shaped like a cube or is it better to have them on one plane(flat)?
Are there methods for calculating the size and ratio of the vanes?
Sorry so layman terms I don't know much about aerials.
(but I do know Shinoloa)
Oh the reason I ask is I want to make a cool and functional aerial for my house.
I think what you have seen is what is called a ground plain antenna. That is, you have an element that is vertical and 3-4 that are either horizontal or at a 45 degree angle. The vertical part is the main radiating portion of the antenna and the horizontal elements are connected to the ground.
However, there are many, many different kinds of antennas. I have a very extensive library of antenna books, and I still have only scratched the surface.
You have many considerations when it comes to antennas: polarization, frequency, what type of communications path, what type of communications in general, and space requirements. Almost all antennas are some kind of a compromise.
As for calculations for a simple antenna that will match a 50 ohm antenna input -- the type that most of us are familiar with on HAM radio transceivers and CBs -- you simply divide 234 by the frequency in megahertz, which for the CB radio would be 234 divided by 27 (since it is 27mHz) this will give you the length in feet. You cut one piece of wire, or tubing to this length, and attach it to the center conductor of the coax. You cut 3 more and attach that to the shield. The one that you attached to the coax center should go vertical, and the ones attached to the shield should slope down at a 45 degree angle, and spaced 120 degrees apart.
I am still a little stumped on your question, but I thought that I would give it a go anyway. I have been a HAM for 10 years, a shortwave listener, as well as a scanner buff since I was about 8 years old. I also have a very extensive knowledge on antennas.
John, AD7VH