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Author: Subject: CB Radio Antenna Tune Question
Ken Cooke
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[*] posted on 8-19-2016 at 10:24 PM


I don't believe it! David K is outfitting his truck with a CB radio!!:bounce:



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PaulW
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[*] posted on 8-20-2016 at 05:23 AM


Doing the same thing except on my Jeep. Here is a ref for ant mount that is more applicable for a Taco than a Jeep. It gives a good review on the NMO mount.
http://www.hamradio.me/antennas/nmo-mobile-antenna-mount-opt...
I am using the nmo on a fender bracket due to the plastic roof on the Jeep. Fender mounts are applicable to just about any vehicle and are little compromised compared to a hole in the metal roof.
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[*] posted on 8-20-2016 at 09:00 AM


I can bring my Bird watt meter if anyone needs to tune their CB on the PLR run.
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David K
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[*] posted on 8-20-2016 at 09:05 AM


Quote: Originally posted by PaulW  
Doing the same thing except on my Jeep. Here is a ref for ant mount that is more applicable for a Taco than a Jeep. It gives a good review on the NMO mount.
http://www.hamradio.me/antennas/nmo-mobile-antenna-mount-opt...
I am using the nmo on a fender bracket due to the plastic roof on the Jeep. Fender mounts are applicable to just about any vehicle and are little compromised compared to a hole in the metal roof.


Not drilling a hole in my roof, sorry. The antenna will only be up there for group trips, so not all the time. I don't want to hear the noise of skip and static while driving as I have XM satellite radio, instead. Anyway how do you do "hands-free" driving with a CB or is there a blue tooth option? LOL




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[*] posted on 8-20-2016 at 09:07 AM


Quote: Originally posted by lencho  
Quote: Originally posted by David K  
The antenna seriously needs to be adjusted otherwise you will have both poor range and risk damaging the radio.

Don't ignore the ground plane consideration. :!:

.


Yes, with a magnetic mount, I can place the antenna in the center of my large roof ground plane, creating great omnidirectional radiation of my signal. Thank you.




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[*] posted on 8-20-2016 at 09:11 AM


Quote: Originally posted by Ken Cooke  
I don't believe it! David K is outfitting his truck with a CB radio!!:bounce:


Well if it was good enough in the 1970's, then it is just fine for the 2010's!

It was just 23 channels when I got involved but soon jumped to 40 with the surge in popularity. We used to add extra crystals to have private channels either above 23 or below 1, back in the day. Oh, and linear amplifiers too... 4 watts just doesn't cut it when skip is in!




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[*] posted on 8-20-2016 at 09:33 AM


If you want better communications use a VHF FM radio like SCORE uses. No static or noise. I have several mobile units at 50 watts but if you only need a handheld for comms like on the PLR trail the Baofeng from Amazon works really good for about $30. Just use the key lockout for those technically challenged.
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[*] posted on 8-20-2016 at 09:55 AM
TW is correct again!


The small hand held Baofeng, right out of the box, under 30 bucks, includes an antenna, clear communication, skip free, no SWR meter.

In a group "convoy" situation it works just fine - you cannot, however, get CB channels on it as far as I know.

For the money - this is the way to go.

Model: UV-5R+ on Amazon and elsewhere

This radio also gets the race frequencies, BFG, Weatherman, and most of the rest of them.

John
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[*] posted on 8-20-2016 at 09:59 AM


??? Never heard of this before?
The issue is that everyone would need one, and at the moment, everyone on our group caravans has a CB, except me... unless TW loans me his!
I am looking at the Cobra 75WXST as it is small (all in the mike) yet has good reviews and low noise filtration.




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[*] posted on 8-20-2016 at 10:04 AM


DK you are right as far as the PLR group is concerned but having a VHF radio comes in handy for the off road races and the Baofeng is easy to tune for the marine frequencies, ie: rescue services.

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[*] posted on 8-20-2016 at 10:24 AM


I always thought it was easier to buy a long coax and shorten it, rather than shortening the antenna.


Quote: Originally posted by David K  
The antenna seriously needs to be adjusted otherwise you will have both poor range and risk damaging the radio. An SWR of 2 or under is desired through all 40 channels. You check the SWR on channel 1 and 40. You adjust the height of the antenna so at both extreme channels are below 2.0, ideally.




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[*] posted on 8-20-2016 at 10:35 AM


The radio waves leave from the antenna, if the antenna is not matched to the location & radio then the radio signals (energy/ heat) cannot get "out" of the antenna well... that causes a heat/ energy buildup inside then CB's "finals".

Here is YouTube on how to trim the antenna for the lowest SWR reading:





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[*] posted on 8-20-2016 at 01:07 PM
Blue Diamond


After trial and error (money spent foolishly) I have found that the Blue Diamond brand, U.S.A. manufactured, cable stretcher to be the best, but they aren't cheap.

I will loan it though.

John
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[*] posted on 8-20-2016 at 04:06 PM


I have found RG-8U to be the best low loss coax with ham radio, but a real PITA when used with a stretcher. Remember, each 3 dB loss is a 50% cut in transmitting power (5 watts becomes 2 1/2 watts). And that 5 watts is input power to the radio, not power out anyway.
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[*] posted on 8-20-2016 at 04:30 PM


Quote: Originally posted by John M  
The small hand held Baofeng, right out of the box, under 30 bucks, includes an antenna, clear communication, skip free, no SWR meter.

In a group "convoy" situation it works just fine - you cannot, however, get CB channels on it as far as I know.

For the money - this is the way to go.

Model: UV-5R+ on Amazon and elsewhere

This radio also gets the race frequencies, BFG, Weatherman, and most of the rest of them.

John



Exactly. We use a 65 watt radio in the truck for the races and the UV-5R while walking around. Works great...plus you can tune them for marine frequencies while at the beach. Most everyone we know have moved on from CB.
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[*] posted on 8-20-2016 at 04:44 PM


People I jeep with all use marine or race radios too. Cb is 5 watts, marine is 25 watts, race radio 50 plus watts. I have both cb and marine radios installed.
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[*] posted on 8-20-2016 at 04:52 PM


That's the way to go....Most Farmer ranchers have a base station in the shop, and radios in all the equipment...Side benefit is accessing a repeater and being able to communicate cross country...I bought a Baofung handheld BF F8Hp which also allows me to talk to the cops and monitor emergency service channels. Works fine sitting on the dash of my truck, no external antenna needed...about 55 bucks..Adios CB



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[*] posted on 8-20-2016 at 04:57 PM



Quote: Originally posted by David K  
Quote: Originally posted by PaulW  
Doing the same thing except on my Jeep. Here is a ref for ant mount that is more applicable for a Taco than a Jeep. It gives a good review on the NMO mount.
http://www.hamradio.me/antennas/nmo-mobile-antenna-mount-opt...
I am using the nmo on a fender bracket due to the plastic roof on the Jeep. Fender mounts are applicable to just about any vehicle and are little compromised compared to a hole in the metal roof.


Not drilling a hole in my roof, sorry. The antenna will only be up there for group trips, so not all the time. I don't want to hear the noise of skip and static while driving as I have XM satellite radio, instead. Anyway how do you do "hands-free" driving with a CB or is there a blue tooth option? LOL

========
David,
No way I would suggest drilling a hole in your roof. Use a fender mount with a proper NMO attached to the fender mount
When the antenna is removed all that is left is the small bracket. The whole front of the vehicle results in a great ground plane.
I would suggest making your own bracket with a small piece of metal. Use the correct screws and it will be strong and removable.
Put the mount between the fender and the hood.



nmo Fender mount.jpg - 52kB
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[*] posted on 8-20-2016 at 06:34 PM


No matter cb, marine, or race radio it's alot of fun when everyone in the group can communicate and make fun of each other.
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David K
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[*] posted on 8-20-2016 at 06:53 PM


The CB is installed... wired direct to the battery... and I was surprised that I could not hear anyone on any channel the several minutes I had it on and in scan mode. Don't truckers use CB anymore, either? No skip... just static, and set squelch just above static point. See, it's been ages since I used a CB except on the PLR run.
So, next, I will check the SWR of the antenna and adjust if needed. If the antenna is not synced then that would be another reason why I heard no CBers?

[Edited on 8-21-2016 by David K]




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