Question about Radio Communications
It is either 72MHz or 216MHz. There r a lot of utube videos on DIY Dipoles but u must change the length to match the frequency.
A VHF TV antenna will work for 72. Length = 39" each side-- 216MHz is going to be 13" - total will be about 80" and 28"
The issue is the matching xformer. A dipole presents 300 ohm impedance. The 200 is a 50 ohm Z. a typical TV matching xfmr is 300 to 75 so u will have to build the right one of maybe find one in a HAM store.
Google this - 1/2 wave dipole ham - for lots of ideas
Posted on Dec 26, 2014
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Posted on Jan 02, 2017
SOURCE: cb antenna warning
If your readings are below 0.5 with a dipole that is a excellent swr reading, most fall in the area of 2.0 or higher, you will not harm your RF output transistor, if you are getting antenna warnings see if you can recalibrate it.
Posted on May 05, 2012
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