With Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts.
Tell us about yourself!
Quarter Wave Dual Band VHF/UHF Ham Radio Antenna
There is no need for the 6.5" elements, unless you have a UHF SWR meter and want to spend a lot of time installing the antenna, measuring SWR, taking it down, trimming the elements, re-installing the antenna, measuring SWR, taking it back down, trimming the elements again, etc., etc. until you get it set for one precise frequency. The common version of this antenna uses all 19.5" elements -- ONE up and four down -- is easier to build, gives dual band performance at least as good as this more complicated version, and a significantly smoother omnidirectional radiation pattern.Hams should know that a quarter-wave element for 2m VHF will also work as a three-quarter-wave element on 70cm UHF.
Basically its an omni directional antenna but you could aligned it so that the top of the V elements is slanting towards your repeater. Tqvm Darks10
Where the antenna should be oriented?
This is the antenna I built as a Novice, (KA9WXT), back in 1983 and I placed the antenna in the attic. I am proud to say it is still in the attic and performing quite well. I also have one in my 'GO BOX' along with my two SLINKIES.
tqvm. I have achieved bronze view achievement for dualband antenna but recenty it dissappear, why?
Tqvm for the suggestion
3/32 inch, but Neo commented below he used a larger diameter, maybe 1/4 inch and hammered the end flat and drill holes for the screws
someone mentioned that silicon becomes conductive at high frquenciesdid your swr change after you added the silicon?may i suggest hot glue?
Join 2 million + to receive instant DIY inspiration in your inbox.
Download our apps!
© 2016 Autodesk, Inc.