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Nothing but noise after new install...

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68jimmy
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Nothing but noise after new install...

Post by 68jimmy » Thursday, 20 April 2017, 18:47 PM

Good evening and hello from Albuquerque. This is my first CB install and I'm needing some wisdom from those who are in the know. First the basics, the radio is a used Cobra 19 DX IV from a local craigslist ad, a 4' firestik ground plane antennae from RightChannelRadios that included the mounting brackets, coax cable and finally the vehicle is a 1989 Toyota 4Runner.

I mounted the cb under the radio in the dash, attached power and routed the cable under the carpet behind the interior panels to where the cable attaches to the antennae on the drivers side above the taillight. All in all I was pretty proud of my install until I powered up the radio. The radio powers up fine but all I get is noise on all channels with no discernible audio from anyone transmitting. The display on the radio shows 'Busy' which according to the manual it's receiving something regardless of the squelch or rf gain settings.

I don't have an swr meter so I haven't tuned the antennae but I have verified my mount is grounded properly by using a meter to check the resistance between the negative post of my battery and the mount itself. I figured the radio should be picking up some type of chatter which would cleanup after an antenna tune. Any help with troubleshooting would be greatly appreciated.

Thanks in Advance!
donovan


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Re: Nothing but noise after new install...

Post by Bozo » Thursday, 20 April 2017, 20:57 PM

I would suggest checking your SWR's with a meter, but it sounds like the radio could have issues. You said that you got out on Craigslist. That sounds suspicious like a bad buy.

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Re: Nothing but noise after new install...

Post by Bluerunner » Thursday, 20 April 2017, 21:05 PM

Is it only noisy with the engine running?

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Re: Nothing but noise after new install...

Post by silvereagle1 » Friday, 21 April 2017, 3:39 AM

Check to see if it has a NB (Noise Blanker) switch.

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Re: Nothing but noise after new install...

Post by 68jimmy » Friday, 21 April 2017, 6:31 AM

Bozo wrote:
Thursday, 20 April 2017, 20:57 PM
I would suggest checking your SWR's with a meter, but it sounds like the radio could have issues. You said that you got out on Craigslist. That sounds suspicious like a bad buy.


Luckily I only paid $25 for it.... I'll probably order an swr from right channel today.

Thanks.

(edited by MDY, repaired quote)


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Re: Nothing but noise after new install...

Post by 68jimmy » Friday, 21 April 2017, 6:33 AM

Bluerunner, Noisy either way.

Silvereagle1, No NB switch

Thanks!

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Re: Nothing but noise after new install...

Post by sonoma » Friday, 21 April 2017, 6:40 AM

you have got to find a swr meter to see what your swr is at. if it is messed up could cause these problems. a cheap 12.00 one will work just to set the swr and go from there. you need to get one that has some form of wattage out put reading also . using a ohm meter you can check if any thing is shorted with the coax. make sure your mount has the fiber washer in the right location so the antenna is not touching ground. just a couple days ago one guy here had the insulator in the wrong spot and he could not get any thing but noise also.

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Re: Nothing but noise after new install...

Post by 68jimmy » Friday, 21 April 2017, 7:15 AM

Sonoma,

Thanks for the info. Cant seem to find any cb shops here in albuquerque so I'll probably order an swr meter today. I made sure the plastic washer was in the right place before I snugged it down and checked for a proper ground between the mount itself and the neg post of my battery which was under 10ohms, seems ok...

Thanks.

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Re: Nothing but noise after new install...

Post by sonoma » Friday, 21 April 2017, 9:16 AM

put the ohm meter on the antenna and ground to see if it shows to be no resistance on the meter. should show a open conection.

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Re: Nothing but noise after new install...

Post by MDYoungblood » Friday, 21 April 2017, 14:13 PM

68jimmy wrote:
Friday, 21 April 2017, 7:15 AM
Sonoma,

Thanks for the info. Cant seem to find any cb shops here in albuquerque so I'll probably order an swr meter today. I made sure the plastic washer was in the right place before I snugged it down and checked for a proper ground between the mount itself and the neg post of my battery which was under 10ohms, seems ok...

Thanks.
Check the coax to make sure it isn't shorted or broken like sonoma said, it also could be the antenna is bad, fiberglass antennas usually break contact at the solder joint on the stud.

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Re: Nothing but noise after new install...

Post by 68jimmy » Friday, 21 April 2017, 17:45 PM

MDYoungblood wrote:
Friday, 21 April 2017, 14:13 PM
68jimmy wrote:
Friday, 21 April 2017, 7:15 AM
Sonoma,

Thanks for the info. Cant seem to find any cb shops here in albuquerque so I'll probably order an swr meter today. I made sure the plastic washer was in the right place before I snugged it down and checked for a proper ground between the mount itself and the neg post of my battery which was under 10ohms, seems ok...

Thanks.
Check the coax to make sure it isn't shorted or broken like sonoma said, it also could be the antenna is bad, fiberglass antennas usually break contact at the solder joint on the stud.

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Greg
MDTYoungblood, Thanks for the reply. As Sonoma suggested, I rechecked the antennae vs. ground and I'm happy to say that it all checks out ok. The antennae is brand new from RightChannelRadios and I'm sure it is ok. I will say that earlier today as I was around town I was able to pick up a faint conversation on Channel 16 so it may just be that my antennae needs a tune...

Thanks.


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