Antenna Ham Radio
Antenna Ham Radio
 |
No items matching your keywords were found.
|
|
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... |
|
|
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... |
|
|
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... |
|
|
BLMA Models HO Scale Kit Radio Tower w/Antennas $35.99 HO KIT Radio Tower w/AntennasBlma ModelsPart BLM4101... |
|
|
Midland 75-822 40 Channel CB-Way Radio $119.99 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... |
|
|
Uniden BC355C 800MHz 300-Channel Base Mobile Scanner (Black) $99.99 Includes 300 channels close call RF capture technology with do-not-disturb and temporary lockoutsPreprogrammed service search makes finding interesting active frequencies even easierThe most interesting "action" bands hear police ambulance fire amateur radio public utilities weather and moreClose Call RF Capture Technology instantly tunes to signals from nearby transmittersIncludes AC adapters DC ... |
|
|
Uniden PRO510XL 40-Channel CB Radio $49.99 40 CHANNELMICROELECTRONICS INTEGRATED INTO A EURO-STYLE 2-WAY RADIOANL SWITCHCOMPACTS/RF METERUPC : 050633031131Shipping Dimensions : 12.00in X 5.75in X 3.00inEstimated Shipping Weight : 2.3375... |
|
|
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.... |
|
|
Reverse SMA to PL-259 Adapter Cable - Female/Female for Wouxun $14.99 This Cable accepts a PL-259 from Base/Mobile antennas, & adapts it to the Male"SMA" style jack found on Wouxun, Linton & other 'reverse sma' Two Way radios & Amateur Radio handhelds. (see closeup of SMA on cable) Not for Yaesu, Alinco, Icom or Kenwood Ham Radios (see other version). Fits Wouxon KG-UVD series of Handheld radios, & others wth "pin in radio" sma jacks.... |
|
|
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... |
|
|
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... |
|
|
Midland 1001Z 40-Channel CB Radio $21.00 The Midland 1001Z two-way, 40-channel CB radio represents the state of the art in CB engineering. Incorporating microprocessor controlled PLL circuitry for precise tuning, it boasts 4 Watts of power, an emergency channel, digital power signal strength meter, squelch control, external speaker and PA speaker jacks, and plenty more. Installation is a breeze in most cars, trucks and RVs. Perfect for n... |
|
|
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..... |
|
|
Ham Radio For Dummies $12.87 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... |
|
|
ARRL Handbook for Radio Communications 2012 softcover $33.42 ... |
|
|
ARRL's Wire Antenna Classics $9.36 -- 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... |
|
|
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) |
|
|
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... |
Ham Radio Antenna impedance?
I have a transmitting ham radio with a stock rubber ducky antenna. The antenna is very poor at sending a signal so I want to make a much larger one to increase its transmitting range. There is one major problem. Unlike a regular radio were you could put many different sizes and shaped antennas on it to receive a signal, a transmitting radio has to have an antenna with the right amount of impedance (measured in ohms). My radio has to have an antenna with 50 ohms of impedance any less and any more could damage or destroy to radio. So how do you measure the impedance of an antenna? Can you measure it with a standard ohm meter and if you can what are the steps you would take to do so?
If you don’t know please don’t answer.
Use an antenna analyzer - they have a built-in noise bridge, which is the actual instrument that detects complex impedance. In addition, you might want to use a grid dip oscillator to find your antenna's resonant frequency.
Make sure you measure the antenna's impedance at the feedpoint. This will give you the most accurate reading, as it eliminates any possible feedline issues.
The following website is devoted to CB antenna theory, but the theory is the same at least the 10 & 12 meter ham bands which are near CB frequencies (27 MHz 11 meter AM and SSB).
http://www.signalengineering.com/ultimate/index.html