Cascadia Antenna Solutions

my thought is if you had dual antennas on the back that are the proper amount of feet apart. have no reflection front to back. meaning north to south. no reflection side to side. meaning east to west...and you could use a pair of matching antennas of your liking that actually perform on a field strength meter. talking/receiving 35/50 miles would probably be the norm for all of us

 

of course your going to have reflection look what the antennas are surrounded by....... but I'm talking more where each antenna can pretty much stand on its own and feed off each other.....

 

It works like a beam when it's done correctly..

 

Craig from previous post I saw that you had the 40 inch extension with a predator antenna and now I see you're looking to go to the dipole method so I assume the 40 inch extension and the Predator antenna combination did not work for you. Thanks

 

Craig, if your SWR is still sky high as you say, something has to be shorted. Be absolutely sure that there is no continuity between the center post on the stud and the bracket.

0 ohms... anything other than zero, it's shorted.

Double check your coax while it is disconnected. 0 ohms between the barrel nut and the center conductor.

Also start out with two identical antennas as your radiator and counterpoise. Not one 3 ft and one 5 foot... or one Wilson and one Francis. Two regular CB antennas of the same brand and length should put it in the ballpark.

 

I told Craig I'd take care of it for him on Monday if he feels like stopping in my neighborhood before he goes to Carlisle.

 

Since common core math seems to be 6 inches off, here is a calculator to simplify things.
http://www.wavelengthcalculator.com/

 

What?

It's not 108.

You are talking about dipoles, not single wire antennas so it is simple - to find the length for a half wave dipole is L=468/f

So for a side of a dipole at center of the band, it is ~103= (468/27.2)/2 ... it comes out to 103" for one side. If you want to go a quarter wave, the divide the 103 by 2.

A whip is a monopole antenna, it works off a different formula which is closer to the what is posted.

By the way one reason why these dipoles are not all working as they should be is because of none of you guys are listening to what is going on. You are allowing current to be induced through the shielding of the coax, causing common mode conditions. This is because you are trying to use a balanced antenna with an unbalance feedline and nothing in between >>>> you can't just throw a mount up on the truck with an second reflective or rf tuned ground being fed with an unbalanced feed line and expect it to work right, the feed line acts as part of the antenna at that point and this isn't why you won't get a proper reading in your antenna analyzers. The real issue is all of this have been done before and there is no secrets that you guys can create to fix it.

 

works just fine for me ..................

 

that makes sense ...