help please any body ?

[j1s]

Hi All,

I bought a CB radio about a year ago, and only took it out of the box and fitted it in my truck yesterday,
all seemed well although i only heard about 4 people on i did not manage to communicate with anybody to see if it was working.

Its been 20 years since i last used CB's so i guess i am a little rusty,

After i hand had the unit on in my truck for about an hour it started to show that i was receiving a signal that rated 30+ on my screen wavered a little , and scanned all channels and the same, in EU & UK, i traveled about 15 miles and it still continued.

Did simple checks, turned engine of mobile etc, and still the same in every location, is there something i have missed ? did i forget to do something simple ?

Basic Set-UP

Team RoadCom Rig, external speaker
Mag mount
Powered and earthed through same loom as car stereo


Thanks in Advance

j1s

[stampman]

hi and welcome have deleated your double posting as we are easily confused on here this could be a question for andy

[Dragonfly]

Large trucks are 24 volt system and will do your radio no good if it is a 12volt set, U will need a voltage dropper if the truck is not allready fitted with one. There are 24 volt CB radios for sale nowadays.
I still get ocassional bouts of hash from certain trailors when the fridge is running ,and hashy channels from ABS or onboard computer or satelite tracking or god no,s what , some wagons can create enough interferrence to make CB radios useless.

Try the set in your car to see how it works.

[stampman]

as suggested try in car sounds as thought the set may be faulty unless the batterys are being drained on the truck and the altinator starts running at full power to charge them disconnect the antenna and see if you are still getting the same reading if so its deffinately rf are you running a cool box or fridge in the waggon as they can give probl;ems as well

[Guzzy]

Large trucks are 24 volt system and will do your radio no good if it is a 12volt set, U will need a voltage dropper if the truck is not allready fitted with one. There are 24 volt CB radios for sale nowadays.

The rig that j1s has is dual voltage (12V or 24V).

We know this because otherwise the post would have been; "I installed the rig in my truck and when I plugged it in, it went BANG!"

In regards to the interference problem, you could try fitting clip on ferrites on the power lead.

they look like this:



Some details here: Filtering with cable-mounted CM chokes

This may (or may not) help depending on where the interference is getting in from.

[stampman]

he would be very lucky if a ferrite filter worked most interferance comes down the antenna if you kill that then you deafen the set

[Guzzy]

For the sake of 25p it's one less path for interference to get into the CB radio.

[stampman]

reading the post again i would change the 24/12 volt dropper

[Guzzy]

reading the post again i would change the 24/12 volt dropper

Powered and earthed through same loom as car stereo

Is that how the "car stereo" in a truck works, it's a 12v unit and gets fed through a voltage dropper?

[stampman]

yes all trucks have a built in dropper if you are unlucky the it can give an awful lot of interferance and the only way to cure it is to replce it

[Guzzy]

yes all trucks have a built in dropper if you are unlucky the it can give an awful lot of interferance and the only way to cure it is to replce it

Ah, that explains it then.

[stampman]

at least its a start

[Dragonfly]

Yesterday i had 8 pounds of interference on my truck cb for 3 hours then when i switched the lights off the interfierence stoped,the Trailor had LCD lights but i dont no if that was the cause ,the next trailor was no problem.

[stampman]

could be the altinator working harder to power the lights