CB antenna tuning, what am i doing wrong? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > General Tech Forums > Communications and Electronics

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 02-01-2014, 05:34 PM   #1
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
CB antenna tuning, what am i doing wrong?

So I am running the fire-ring 18' cable and I made sure with my ohmmeter that the middle antenna pin is isolated from the ground with the plastic pieces on the top and bottom in the mount. The antenna base is the one that is made by Teraflex and goes behind the rear driver turn signal. The base is grounded properly as I checked it also with my ohmmeter. I went out to tune the 2' firestick II antenna in a field with the nearest anything is a good 150 yards and the best I can get on my SWR meter is around a 3. I did have extra wire from the 18' cable and I just coiled it up rather than run it all around the Jeep. Is that bad? The wire runs along the driver side of the Jeep until it gets to the driver's seat and then it runs under the console and out where the e-brake handle is. Any type of help would be appreciated as I have no idea what I am doing wrong.

__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-01-2014, 06:27 PM   #2
Jeeper
 
Roblaza's Avatar
 
Join Date: Sep 2013
Location: Barrie, ON Canada
Posts: 141
what do you mean by your swr is 3? usually you have to take 2 readings, one on channel 1 and one on channel 40. you want as close to 1:1 as you can get. if it your swr on channel 1 is higher than on 40 your antenna is too short, if its higher on 40 than it is on 1 its too long.

here's a good link to read up

CB Antenna Tuning Instructions | Right Channel Radios

__________________
My Build:
http://www.wranglerforum.com/f322/pr...rt-409826.html

Jeepcentral.ca
Roblaza is online now   Quote Quick Reply
Old 02-01-2014, 07:05 PM   #3
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
The SWR is around 3 on both channel 1 & 40. The link you posted is the procedure I have been following.
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 10:30 AM   #4
Jeeper
 
Roblaza's Avatar
 
Join Date: Sep 2013
Location: Barrie, ON Canada
Posts: 141
On your antenna. Is there a little ground wire coming out of the bottom of it? Like this:


If there is and you hooked it up, unhook it and try the swr reading again
__________________
My Build:
http://www.wranglerforum.com/f322/pr...rt-409826.html

Jeepcentral.ca
Roblaza is online now   Quote Quick Reply
Old 02-02-2014, 10:47 AM   #5
Jeeper
 
Serg5000's Avatar
 
Join Date: Jun 2012
Location: Palmdale, Ca
Posts: 790
The firestick II does not come with that ground wire on it.

My question is, Did you use the small plastic washer that comes with the antenna hardware? I had forgot to install that and when I did everything was much better.
__________________

Go Out And Explore!
Serg5000 is online now   Quote Quick Reply
Old 02-02-2014, 11:08 AM   #6
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
Quote:
Originally Posted by Serg5000 View Post
The firestick II does not come with that ground wire on it. My question is, Did you use the small plastic washer that comes with the antenna hardware? I had forgot to install that and when I did everything was much better.
Yep the antenna is totally isolated from the mount and I checked it with my ohmmeter.

I get a SWR of 2.1 on channel 20.
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 11:15 AM   #7
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
I took ohm readings of the firering cable and the 3' SWR cable. Resistance in the cables are all the same at 1 ohm. The resistance from the firering ground of the cable end that connects to the radio to the ground/body of the vehicle is 4.8 ohms. I even grounded the antenna mount plate using jumper cables to the vehicle and no SWR readings changed. All locations that need grounding have been sanded down to bare metal using a Dremel.

I installed the stack up as shown on this page, http://www.firestik.com/Tech_Docs/Te...Continuity.htm, and I followed all tests located on this page and everything is good.

This is a list of parts I am using, all Firestik parts purchased from Right Channel Radios.


Firestik FireRing CB Coax with FME - 18' Firestik MU-8R18
Firestik FireRing Compatible Stud Firestik K4R
Firestik FS CB Antenna
Antenna Color
White
Length
2'
FS2
SWR Meter with Jumper Cable (SWR2T + A8X1) |OR| AUSWR
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 04:20 PM   #8
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,878
Images: 2
Undo the bottom nut and lift the mount out of the bracket so you can verify that the white insulating shoulder washer is properly centered in the mounting bracket's hole, shoulder down into the hole itself. That insulating shoulder washer's job is absolutely critical to preventing the antenna from touching the mounting bracket. If the insulating shoulder washer is not able to do its job, a high SWR is the result.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 02-02-2014, 04:23 PM   #9
Supporting Member

WF Supporting Member
 
Barmanvarn's Avatar
 
Join Date: Sep 2011
Location: Sherwood, AR
Posts: 4,317
I had the same issue on a 2' FireStik. No amount of turning the tuning screw affected the SWR. All SWR readings were in the red.

I can pop on my 3' FireStik and it'll tune perfectly. Haven't had a chance yet to track down the problem.
__________________
-Brian
2012 Cherry Red JK
TF 2.5 Coils w/ Billstein 5100 Shocks
17x8 Black Rock D-Window Alloys
315/70/17 GY Duratracs
4:56 Gears - LSD in Rear w/ Ten Factory Chromoly Shafts
TF HD Diff Covers
Barmanvarn is offline   Quote Quick Reply
Old 02-02-2014, 05:00 PM   #10
Supporting Member

WF Supporting Member
 
wayne d's Avatar
 
Join Date: Aug 2013
Location: Stuart, Florida
Posts: 551
Quote:
Originally Posted by Barmanvarn View Post
I had the same issue on a 2' FireStik. No amount of turning the tuning screw affected the SWR. All SWR readings were in the red.

I can pop on my 3' FireStik and it'll tune perfectly. Haven't had a chance yet to track down the problem.
I had the same problem. 2' firestik, high swr.
3' firestik, low swr.
No idea why.
__________________
Best regards from a flatlander in Florida.
Now Pass the Rum!
Wayne,
2014 Anvil JKU
Thanks to all those that have served and are still serving protecting the freedoms we love.
wayne d is online now   Quote Quick Reply
Old 02-02-2014, 05:04 PM   #11
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
Quote:
Originally Posted by Jerry Bransford View Post
Undo the bottom nut and lift the mount out of the bracket so you can verify that the white insulating shoulder washer is properly centered in the mounting bracket's hole, shoulder down into the hole itself. That insulating shoulder washer's job is absolutely critical to preventing the antenna from touching the mounting bracket. If the insulating shoulder washer is not able to do its job, a high SWR is the result.
Thanks for the idea Jerry. Here is a picture with the red arrows pointing to the lips of the plastic isolaters.Click image for larger version

Name:	3.JPG
Views:	59
Size:	125.0 KB
ID:	729081
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 05:17 PM   #12
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
So I started a new thread about this problem with a lot more detail and pictures here.

CB Antenna help needed.

Thanks for your help.
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 07:23 PM   #13
Jeeper
 
Serg5000's Avatar
 
Join Date: Jun 2012
Location: Palmdale, Ca
Posts: 790
Quote:
Originally Posted by doclouie View Post
Thanks for the idea Jerry. Here is a picture with the red arrows pointing to the lips of the plastic isolaters.
what is the bottom arrow pointing to?

When I installed my antenna bracket, I did not remove any paint. Thing works great
__________________

Go Out And Explore!
Serg5000 is online now   Quote Quick Reply
Old 02-02-2014, 07:27 PM   #14
Supporting Member

WF Supporting Member
 
wayne d's Avatar
 
Join Date: Aug 2013
Location: Stuart, Florida
Posts: 551
How are you using the swr meter?
Set to fwd. key mike and calibrate
Flip switch, key mike.
__________________
Best regards from a flatlander in Florida.
Now Pass the Rum!
Wayne,
2014 Anvil JKU
Thanks to all those that have served and are still serving protecting the freedoms we love.
wayne d is online now   Quote Quick Reply
Old 02-02-2014, 07:51 PM   #15
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
Quote:
Originally Posted by wayne d View Post
How are you using the swr meter?
Set to fwd. key mike and calibrate
Flip switch, key mike.
Yep that is what I am doing.
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 07:53 PM   #16
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
Quote:
Originally Posted by Serg5000 View Post
what is the bottom arrow pointing to?

When I installed my antenna bracket, I did not remove any paint. Thing works great
The FireRing has a plastic piece that goes into the mounting hole to isolate the antenna from ground. The white part is completely in the hole and there is a metal ring on the bottom that creates the ground needed.
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 07:56 PM   #17
Jeeper
 
Serg5000's Avatar
 
Join Date: Jun 2012
Location: Palmdale, Ca
Posts: 790
Quote:
Originally Posted by doclouie View Post
The FireRing has a plastic piece that goes into the mounting hole to isolate the antenna from ground. The white part is completely in the hole and there is a metal ring on the bottom that creates the ground needed.
i have the same setup. I will check it out and get back to you.
__________________

Go Out And Explore!
Serg5000 is online now   Quote Quick Reply
Old 02-02-2014, 08:00 PM   #18
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
Quote:
Originally Posted by Serg5000 View Post
i have the same setup. I will check it out and get back to you.
Thank you!
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 08:05 PM   #19
Supporting Member

WF Supporting Member
 
wayne d's Avatar
 
Join Date: Aug 2013
Location: Stuart, Florida
Posts: 551
I have the same setup also. Did you have to soldier the radio end on the coax? Mine was loose and separate in the box.
__________________
Best regards from a flatlander in Florida.
Now Pass the Rum!
Wayne,
2014 Anvil JKU
Thanks to all those that have served and are still serving protecting the freedoms we love.
wayne d is online now   Quote Quick Reply
Old 02-02-2014, 08:13 PM   #20
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
Quote:
Originally Posted by wayne d View Post
I have the same setup also. Did you have to soldier the radio end on the coax? Mine was loose and separate in the box.
Nope everything was already soldered.
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 08:15 PM   #21
Supporting Member

WF Supporting Member
 
wayne d's Avatar
 
Join Date: Aug 2013
Location: Stuart, Florida
Posts: 551
Eliminates that.
__________________
Best regards from a flatlander in Florida.
Now Pass the Rum!
Wayne,
2014 Anvil JKU
Thanks to all those that have served and are still serving protecting the freedoms we love.
wayne d is online now   Quote Quick Reply
Old 02-02-2014, 09:35 PM   #22
Jeeper
 
Serg5000's Avatar
 
Join Date: Jun 2012
Location: Palmdale, Ca
Posts: 790
Quote:
Originally Posted by wayne d View Post
I have the same setup also. Did you have to soldier the radio end on the coax? Mine was loose and separate in the box.
i had to solder the end that goes to the CB on my setup. Are you sure it's soldered and not just shoved in place?
__________________

Go Out And Explore!
Serg5000 is online now   Quote Quick Reply
Old 02-02-2014, 09:45 PM   #23
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
I just went and checked and it is on there good.
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 09:53 PM   #24
Jeeper
 
Serg5000's Avatar
 
Join Date: Jun 2012
Location: Palmdale, Ca
Posts: 790
Quote:
Originally Posted by doclouie View Post
I just went and checked and it is on there good.
the end that screws into the CB, the center of that cable, can you see the solder? Sorry to keep beating the dead horse but I was under the impression all 18' firering cables required soldering.

I looked at mine and it installed the way you pic shows.
__________________

Go Out And Explore!
Serg5000 is online now   Quote Quick Reply
Old 02-02-2014, 10:03 PM   #25
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
Don't worry please beat the dead horse to make sure it is dead. Mine did not have the normal end, but a smaller end that had an adapter on it. You can see the crimp on the cable is a professional crimp and not a do it yourself. The blue arrows show the adapter pieces. They do this so it is easier to run the cable through grommets and such.

Name:  5.jpg
Views: 147
Size:  41.0 KB

Click image for larger version

Name:	6.jpg
Views:	33
Size:	172.6 KB
ID:	730049
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 10:07 PM   #26
Moderator

WF Supporting Member
::WF Moderator::
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: In the mountains.
Posts: 3,653
Images: 4
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is online now   Quote Quick Reply
Old 02-02-2014, 10:15 PM   #27
Jeeper
 
Serg5000's Avatar
 
Join Date: Jun 2012
Location: Palmdale, Ca
Posts: 790
The CB end on mine is the regular end. Mine does not have that piece that comes off for easier install.
__________________

Go Out And Explore!
Serg5000 is online now   Quote Quick Reply
Old 02-02-2014, 10:17 PM   #28
Supporting Member

WF Supporting Member
 
wayne d's Avatar
 
Join Date: Aug 2013
Location: Stuart, Florida
Posts: 551
on the second photo, blue arrow. Does that piece screw onto the piece in the first photo?
__________________
Best regards from a flatlander in Florida.
Now Pass the Rum!
Wayne,
2014 Anvil JKU
Thanks to all those that have served and are still serving protecting the freedoms we love.
wayne d is online now   Quote Quick Reply
Old 02-02-2014, 10:22 PM   #29
Jeeper
 
4x4mickey's Avatar
 
Join Date: Dec 2013
Location: Stillwater ,OK
Posts: 380
just scanned this but the first flag i saw was you stated you coiled your coax!
don't ever coil coax it makes a els. magnet. and will cause havoc on your system.
I learned this in my Big truck .
i have drove for over 20yrs and put many C.B.'s in to cars and truck
try to find a way to use the cable if you have to run it all the way around the windshield thats fine you just don't want a tight coil on it. i used to take it from one side to the other of the truck in real lose side to side loops.

also a 2' fire stick is not a great ant. for distance if you want to get out and reach someone and your down in a canyon it won't do it. you have to have the top of your ant. over the top of your truck to get and send signals for others in front of you . otherwise the ones behind you will hear ya just fine. but not anyone in front of you.

if you want fiberglass there are some that are 4-6 foot so they clear the top of your rig. the higher they are the better they are for all around the rig.
I personally prefer the wilson 200 but they are a steel whip and some don't like them because you will get more noise from them however you will also get distance from them and not shatter them if they hit some tree branch when cold.
also 1.5 is the "ideal" swr reading but if you get close your going to be fine. if you get the coils loosened up it will also drop your swr reading

hope that helps some
4x4mickey is offline   Quote Quick Reply
Old 02-02-2014, 10:22 PM   #30
Supporting Member

WF Supporting Member
 
wayne d's Avatar
 
Join Date: Aug 2013
Location: Stuart, Florida
Posts: 551
Quote:
Originally Posted by wayne d View Post
on the second photo, blue arrow. Does that piece screw onto the piece in the first photo?
Answered my own question, disregard.

__________________
Best regards from a flatlander in Florida.
Now Pass the Rum!
Wayne,
2014 Anvil JKU
Thanks to all those that have served and are still serving protecting the freedoms we love.
wayne d is online now   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:26 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC