What is an antenna launcher?
An Antenna Launcher is designed and optimized to launch lines for placing antenna support lines and other applications. These are used not only for antenna work but also for roof work, tree canopy work and electrical work to get a line into places that may be difficult otherwise.
What size PVC pipe will a tennis ball fit in?
2.5 inch diameter schedule 40 is a tight fit for tennis balls, but does the job well. A note here about the barrel. Schedule 40 PVC is fairly available, and Tennis balls fit quite tightly into schedule 40 barrels.
How does a whip antenna work?
The whip antenna is a monopole antenna, and like a vertical dipole has an omnidirectional radiation pattern, radiating equal radio power in all azimuthal directions (perpendicular to the antenna’s axis), with the radiated power falling off with elevation angle to zero on the antenna’s axis.
What is the diameter of a regulation tennis ball?
2.575 inches
The official diameter of a tennis ball, as defined by the International Tennis Federation, is at least 2.575 inches and at most 2.700 inches. Tennis balls are sold in cylindrical containers that contain three balls each.
Is a tennis ball yellow or green?
By rule of tennis law—specifically, the International Tennis Federation, or ITF—a tennis ball should be yellow in color. The edict was handed down in 1972, after television viewers had trouble following the movement of white balls.
What is the circumstance of a tennis ball?
Tennis Balls have a diameter of 2.575”-2.7” (6.54-6.86 cm) and circumference of 8.09”-8.48” (20.6-21.5 cm). The mass of a Tennis Ball must be between 1.975-2.095 oz (56-59.4 g). A Tennis Ball is a ball designed for the sport of tennis.
How do you use a tennis ball launcher?
These launchers use compressed air to accelerate a weighted tennis ball sufficiently enough up through the air to tow a mono-filament fishing line over any branch or tree. The line is then used to string over a wire ham radio antenna and by pre-choosing the proper fill pressure one can get their favorite dipole up and out 400′ or more if need be!
What is pneumatically powered antenna launching?
Pneumatically Powered (Tennis Ball) Antenna Launching. Pneumatic Line launching is perhaps a more apt description. most cases is a long piece of wire. In the launcher pictured above a Tennis Ball is propelled by compressed air, towing a fishing line over the tree. Then we pull up nylon mason twine with the fishline, and finally a wire
Is there a use for antenna launcher?
If you have a need to quickly set up antennas in various field situations, or you have some really nice trees in your backyard, you may have a use for Antenna Launching. What is a Pneumatic Antenna Launcher?
How do you launch a tennis ball over a tree?
In the launcher pictured above a Tennis Ball is propelled by compressed air, towing a fishing line over the tree. Then we pull up nylon mason twine with the fishline, and finally a wire or heavier line as needed.