No, we sell through our dealer channel, please use our dealer locator to find your local dealer.
The antennas differ in type and size of their elements, ferrule material, the way the antennas’ fiberglass is wrapped, and the coax cable that is used. These factors determine the basic cost of building the antennas. To this, add the relative cost of the finish that is applied.
Gain is an increase in effective radiated power (ERP) from an antenna, usually stated in dB (deciBels). As a rule of thumb, you can multiply the radio’s output power by 4 for 6dB antennas and by 8 for 9dB antennas. A 3dB antenna gain gives an ERP of 2 times the radio’s output power. A Unity Gain antenna provides no increase in ERP.
Yes, Shakespeare offers a product that makes this possible with our AS-2 switches, which allow for hook-ups of this nature. The AS-2 is an automatic switch for two radios connecting to one antenna. It electronically senses which transceiver is used and switches the antenna. Further instructions are on the packages.
Shakespeare recommends using a separate antenna for this purpose, if possible. Band separators were designed for boats that don’t have room for two antennas. Be sure the antennas are mounted at least three feet apart.
Yes. Shakespeare’s antennas can be painted any color you wish. Be sure not to use any paint containing metallic chips or lead bases. To prepare the surface, wash the antenna with soap and water and allow it to dry completely. Paint the antenna with polyurethane or a lead free, non-metallic paint.
Yes. Wash the antenna with soap and water first and allow it to dry completely. Next, paint the antenna with polyurethane or a lead free, non-metallic paint. Then lightly sand the surface with 400-grit sandpaper. Additional coats of paint may be added but are usually not necessary.
It depends on your needs and the amount of space that is available to mount the antenna/radio. Some considerations are: the height at which you can mount the antenna; whether you have to raise and lower it to fit under bridges, boathouses or other obstructions; and how far you need the transmitted signal to reach. The longer the antenna, the better coverage you can expect, generally speaking, if a larger antenna will fit on your boat. Always purchase the best antenna you can afford, since the antenna is the most important part of any VHF installation.
There are a few options, the easiest is to do a radio check on a commonly used channel for your area (note that the U.S. Coast Guard frowns on radio test calls made to them, Channel 16). Another option is to call a friend on a channel you agree upon from a range of known distances, then have the friend assess your transmission for quality. The final fail-safe option is to measure the efficiency of your antenna/radio system more scientifically. Shakespeare makes an antenna / radio tester – the ART-3 Tester. The ART-3 measures transceiver output power, antenna VSWR, and proper receiver sensitivity.
An instruction sheet for installing the PL-259 connector is included with the antenna. Follow the instructions and consult the diagrams. For true ease of installation without soldering, check out Shakespeare’s innovative Centerpin® solderless connectors. The PL-259-CP-G and PL-258-CP-G connectors are gold-plated brass construction. If all else fails, there are a few videos on YouTube that walk you through the process, just google “How do you install the PL-259 connector?” and there are many video options to choose from.
Yes, if you need to. However, you should leave at least three feet of coax cable, measured from where the cable exits the antenna. Note: This is NOT true for all antennas. CB antennas’ coax generally should NOT be cut. See separate question regarding CB antennas’ cable length. Reasonable lengths of excess cable can be rolled in a coil of at least 8 inch diameter and stowed in an out-of-the-way place.
This depends on the amount, as well as the type of coax used. On the average, 50 feet of RG-58 coax will have about 3dB loss, 50 feet of RG-8X coax will have about 2dB loss, and 50 feet of RG-213 (RG-8U) will have about 1dB loss.
Yes. It is best to locate the antenna at least three feet from any metal objects or other antennas.
Yes, that’s why our antennas are internally grounded.
No, it must be at least three feet away from the radio, so transmission will not interfere with the radio’s reception. When mounted too close to the radio usually there is a “squeal” that can be heard from the speaker.
There is no particular height requirement. However, the higher the antenna, the better the antenna’s range and performance.
To determine the range of an antenna, multiply the square root of its height (In feet) above water by 1.42. This gives the range in miles. Remember to perform the calculation for BOTH vessels, then add the results to get the range between two vessels.
Not necessarily. Shakespeare VHF and CB Marine Band antennas are designed with independent ground planes built in. SSB antennas, on the other hand, must be properly grounded.
It can range from 1/4 wave to 5/8 wave, depending on the length and style of antenna. Please see the antennas’ specifications section for information on your particular antenna.
Yes and No, you can use a VHF antenna for AIS receive. To transmit AIS you will need a dedicated AIS antenna. If not possible to have a dedicated AIS antenna, and you only have one antenna on the boat, make sure it’s a VHF antenna because that’s the primary form of communication. Please note you will need a splitter to accomplish this (sold separately). If you have independent VHF and AIS antennas on a sailboat, the VHF antenna should be installed at the top of the mast, the AIS should be installed lower down on a radar arch. Due to the fact that range is not as important to AIS.
On all Shakespeare VHF Marine antennas, the receiving zone is 360 degrees – or omni-directional.
Maximum power input varies with the model and type of antenna. Please see the antenna specifications pages.
There are two main reasons to silver plate an antenna element. First, silver is a much better conductor than brass or copper alone. Second, over time, as the silver surface oxidizes it becomes silver oxide, which is a better conductor than the oxides that form on un-plated brass and copper.
All Phase III antennas have a standard 1in-14 thread bases that will work with standard marine mounts. The antennas have the added bonus of being mast mount ready with appropriate U-bolts or strapping.
Any 50-ohm coax may be used with the antenna (except AM/FM) as long as it is sized appropriately for the cable run needed.
A mild detergent or soap and water may be used to clean the antenna. The use of abrasives or cleaners that contain any solvents should be avoided.
No, this is not necessary as these antennas are pre-tuned at our factory for maximum performance and efficiency.
SeaWatch® Marine TV Antennas carry a Shakespeare Limited Warranty for 2 Year from the date of purchase.
Check the voltage from the power supply for 110V AC operation and 12 vDC on DC operation with a voltmeter. If you are experiencing difficulties, try moving out of the slip to see if interference from other boats might be causing your reception problem. VHF TV transmission is line-of-sight, so at sea level you’re quite possibly out of “view” of the TV signal.
Marine TV antennas have the same limitations as the ones that install on top of your home. Poor reception can be caused by location, height (for example, is your boat at sea level?), atmospheric conditions, and power. Make sure your antenna has an open and unobstructed view of the sky.
Yes. However, be sure to seal the coax connector located on the underside of the antenna. Please note this will also diminish the performance of the antenna.
No. TV signals bounce off flat, reflective surfaces, which would effectively shield the antenna from the station’s broadcast.
Yes, two TV’s will work with one antenna, as long as the total coax run is kept relatively short. Our Antennas are set up to run a max of 2 TVs.
Unfortunately, there is no sure test. The best suggestion is: if the signal strength meter on the phone is low or shows no signal, there could be a problem.
Yes, they will. It is best to locate the antenna at least three feet away from any metal objects or other antennas.
The only limit is practicality. However, remember that at the frequencies of Cellular communication, great line loss will be encountered with long coax runs. For best performance, keep the coax short and be sure it is the best grade possible. LMR-400 low-loss coax cable is specifically designed for cellular antenna installations.
For technical assistance with the Shakespeare Stream or Super Halo products, please call or email SureCall at 888.365.6283 or email@example.com.
If you are not getting any signal, the first step is to contact Sirius and make sure they can see your antenna on the network. 855.796.9847 or firstname.lastname@example.org
Satellite Radio antennas only need a clear view of the Southern sky – for them, height is not as important as the unobstructed view to the satellites.
Shakespeare CB antennas are specially built to allow trimming the coax: the Galaxy® Style 5223-XT Note that this answer applies to CB Marine Band antennas – VHF antenna coax is not part of a tuned system and can be trimmed. Reasonable lengths of excess cable can be rolled in a coil of at least 8-inch diameter and stowed in an out-of-the-way place.
There can be quite a number of reasons for this. The most usual reasons are coax having been cut or altered, coax running through conduit, antennas located near metal objects, or people standing too close to the antenna while SWR readings are being taken or improper installation of the PL-259 connector.
No, all Shakespeare CB Marine Band antennas have independent ground planes built into them.
Most of our threads use a standard 1’-14 threaded mount.