About build a 9db, 70cm collinear antenna the resource is currently listed in in 2 categories. This antenna project will allow you to design a collinear antenna for either the 2 meter or the 70cm 440 ham band that will give you lots of gain using the calculator in the download. Build a 9db, 70cm collinear antenna resource detail. Antenna dimension calculators from the antenna elmer antenna dipole. Build a 9 db, 70cm, collinear antenna from coax, mike martell n1hfx. An added bonus is an extremely low angle of radiation. While it is not always feasible to homebrew a commercial quality antenna designed to take. Super jpole antenna calculator and plans collinear design. A coaxial collinear antenna for 70 cm user web pages.
Coax collinear antenna dimension calculator back to antenna calculator overview. Wb3ayw and kk1cw vhfuhf collinear j pole with short. For an antenna with more gain you can add sections, and make it longer. The original antenna was a diamond v2000 2m, 70cm and 6m colinear and i found this worked just as well. Recently the rason technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. Although only a 70 cm antenna was described in this article, the formulas can be easily calculated for the 6 meter, 2 meter. The calculator program available for download to design this antenna is in xls spread sheet format and requires that you have a program that will read xls spread. Now its time to add the additional elements to the top and bottom of the collinear array. Build a 9 db, 70cm, collinear antenna from coax by n1hfx recently the rason technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna.
I was able to get more by using a pair of endfed 12wave antennas. When building my first collinear using this design, i made the loops in a similar way to those seen on many commercial antennas which have multiloop coils, with. Modern resume template for ms word professional cv design teacher cv. This is an introduction to a high gain vhfuhf vertical collinear antenna program and project that can be an asset to many of you that are looking for more gain in a vertical antenna for base or repeater use. I use the nasa engine in conjunction with seaclear software when sailing offshore on friends yachts, and the. A little while ago about 6 years to be exact the best antenna i had for 145mhz was the 14wave magmount antenna on the roof of my car. The main category is antennas projects for 432440 mhz that is about antenna for 70 cm 432440 mhz. This link is listed in our web site directory since tuesday jul 11 2006, and till today build a 9db, 70cm collinear antenna has been followed for a total of 30316 times. Collinear antenna building, by karl shoemaker, ak2o. Build a collinear antenna diy electronics, electronics projects, electronic. Antenna pattern is omni directional very high gain and low to horizon radiation angle. This is a simple and quick design for a collinear antenna. Enter the required frequency in mhz, the velocity factor of.
Antenna calculators antenna plans antenna designs construction antenna how to. This antenna came about as a result of my requiring something quick and cheap for testing a new 70cm transceiver and having nowhere to mount it except of the side of an existing mast. Compiled from the internet for the aara ham radio club 2010. One of the members commented to me that i should write an article about collinear arrays so that we could all build our own. Calculate the required dimensions for a coaxial collinear antenna construction for any given frequency. About 9 db 70cm collinear antenna the resource is currently listed in in 2 categories. A coaxial collinear antenna for 70 cm this coaxial collinear antenna was built to test for my own consumption whether or not this antenna method actually works. High gain collinear ais 162mhz receiving aerial ais decoder. Build a 9db, 70cm collinear antenna con imagenes antenas. It can produce similar results to a commercial version and be made from scraps of coax. Online calculator folded dipole calculator changpuak. C3i antennas calav labs software champion radio products comet antennas. Build a 9db, 70cm collinear antenna with images ham radio. Collinear antennas category is a curation of 21 web resources on, homebrew compact 6dbi collinear antenna, collinear antenna building, build a 9db, 70cm collinear antenna.
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