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Old 11-25-2014, 09:03 PM   #1
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CB Radio Antenna Installation

I wanted to install a CB in my 390QS. The techs at Camping World told me that the glass mount antenna will not work, as I have double pane windows.

I note that a lot of 18-wheelers have their CB antennas mounted on the top of the shell that encompasses the side view mirrors.

I was wondering if anyone has drilled a hole in the top of the mirror shell and snaked the antenna wire through the arm and into the cockpit area for hook-up.
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Old 11-25-2014, 09:17 PM   #2
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I suppose you could but why?

Just use a antenna ball mount on the side above a mirror and run the coax into the headliner.
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Old 11-25-2014, 10:34 PM   #3
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No ground plane

You would have to use a antenna that creates a GROUND plane. Or if you use a 90 bracket (aluminum) to mount your antenna to the side wall with lag bolts. Use a magnet to find the frame around the top of the drivers window to anchor the lag bolt to. The frame may be aluminum. But you still have to get to a part of the coach frame for a ground. You see for a
CB antenna to work, the mount has to be grounded because the frame in the coach becomes part of the antenna system. The longest a ground wire you can use is about 8" in order to get the "STANDING WAVE RATIO"
down in order for it to work. I have a CB I carry with a mag antenna and only turn it on in case traffic is backed up on a interstate for info.

Good luck on drilling any holes in the nice "BERK", personally I wouldn't do it.
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Old 11-25-2014, 11:13 PM   #4
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The statement daisy has written is exactly right . (Old cb er at heart). Whatever solution you use, make sure you use a swr meter and get a swr reading of less than 2:1. If you don't, your transmit capacity will be greatly reduced with damage to cb as a possibility.
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Old 11-26-2014, 01:48 AM   #5
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DJP6371

Note that the 18-wheelers you see that have their
CB antennas in the mirrors have brackets that have
been built into those mirrors when made.

The glass mount antenna's will work, but not are
not all that great .....

As stated you need a good ground, both for the
antenna to mount to and the radio. You can run a
ground longer than 8" but the rule of thumb is the
shorter the better.

In my semi truck and my own pickup i ran a 1" web
copper strap from the frame to the cab in 2 places,
I then hooked a strap from one of the grounds
to the radio...I then hooked a ground strap from
the cab to the antenna bracket on the mirror.

A 3/4 wave antenna is better than a 1/2 or 1/4
wave antenna, antenna's with coils on them
are to me not as good as good old what is
called big sticks or a 102" inch whip which is
a full wave antenna for CB....

A thin wire, even say #12 is not as good a ground
wire as 1" copper shield/woven stripped from
some old coax or bought from a store. The wider
the strapping the better.

Let me say this, get you amateur license,
amatuers have radio that can fit in you
have, put out 5 watts and can talk many
more miles than a CB radio...You can go
across the United states and talk to
amateurs no matter were you with a
handie talkie/hand held radio. You no
longer need to learn morse code and it
very simple to get your license
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Old 11-26-2014, 08:56 PM   #6
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Thanks for you input.....gonna have to do a little more research
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Old 11-26-2014, 08:56 PM   #7
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Thanks for the input!
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Old 11-26-2014, 08:57 PM   #8
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Thanks
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Old 11-26-2014, 08:58 PM   #9
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Thanks for your help!
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Old 11-27-2014, 08:45 AM   #10
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CB mount on BERK

After being in the two-radio business for 28 years (CB & commercial) and thousands of installations in all kinds of vehicles, if needed it can be done
even in Corvettes with fiberglass bodies. I could make antennas work with
a low SWR of 1.5 or lower in any situation. It is all about the ground and the type of antenna. Not all antennas will work in every case.

But again at 28 years working with 1.5 MHZ to 900 MHZ, old wisdom pays off.

N4CNG for a long time
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