Antennas Ham Radio
Antennas Ham Radio
 |
No items matching your keywords were found.
|
|
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 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... |
|
|
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..... |
|
|
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 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... |
|
|
Uniden PRO510XL 40-Channel CB Radio $49.99 As part of Uniden's Professional Series, the Pro 510XL CB radio offers high-performance 40-channel operation in a compact, ultra-mobile radio. This model operates on any of the 40 AM frequencies authorized by the FCC, and its S/RF meter and red-lit LED indicators help you monitor activity at a glance. A built-in noise limiter and ANL switch and squelch control fine-tune performance and eliminate... |
|
|
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 Keep in touch with your buds, be prepared for emergencies. Compact Midland 40-channel CB Radio, SAVE BIG! The time honored way to keep yourself entertained and up-to-date on changing road and weather conditions. Independent RF gain control and squelch for crystal reception. Pro-quality microphone and PA connector for loud-and-clear transmission. And the easy-to-read digital display means you'll ne... |
|
|
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... |
|
|
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) |
do i need the cb ham radio antenna on the ground?
so i have this cb ham radio antenna and it is not on the ground, it is on the roof of my house. my house is not tall, just a normal regular house. do i need to put the antenna on the pole that is on the ground? and not on the roof? well my antenna is on the pole and its on the roof of the house. why is called ground plane antenna? and why do i need to put the antenna with the pole on the ground?
For a ground plane vertical to work correctly they need to be mounted above a conductive sheet or metal or a radial network.
This metal sheeting is called the 'ground plane'.
If your house roof is made form metal roof sheeting , then this can be used as a ground plane surface , just in the same way it is used in a car antenna installation.
This is not however possible if you wish to raise the antenna base away from the surface of the sheeting , eg , on a pipe mast support above your roof.
If you want to get the antenna up on a pole you MUST replace the ground plane with radials.
Radials are wires connected to the base of the antenna and are approximately 1/4 wavelength long.
Typically they are angled slightly down for impedance matching purposes , which also makes them handy in some applications as guy wires.
Up on a pole you don't have as bad an effect called 'earth losses' . this means that 4 radials may be all that is required to get the antenna to perform well. (but more the merrier)
Now if you mount your antenna at ground level the losses force you to use a considerably more amount of radials.
AM band broadcast stations use 120 radials ..!!!!!
Typically though no appreciable gain can be seen after you get past 20 - 30 or so radials.
The result of using less radials than required is poor radiation efficiency.
4 radials just wont cut it in this situation.
That all means that with a poor radials system ,. you have more wasted power , by comparison to a good radial system.
Another disadvantage of using a ground mounted antenna is signal obstruction due to buildings and trees etc.
Not only will these drop the strength of your incoming signals , but they also absorb your outgoing power, which means again , less overall effectiveness from the antenna.
Ground mounted verticals can work well 'ONLY' , if they are mounted in the clear and 'ONLY' when used against a suitable ground system.
Saying this , the fact is , most attempts of ground mounted verticals for CB fall far short of the requirements and often perform poorly.