When I talk on the CB, my voice comes across in all of my door speakers. This only happens with my voice (only transmitting...not when recieving) and when my radio in the truck is on. Is there something i can buy to take out this interference? everytime i want to say something on the CB, i have to turn off my headunit. Or is it just how i have wires running or something like that? please let me know if you have any ideas.

Thanks
Will

 

*****: I'll look out for you and post back later. I haven't heard any body ask about CB interference in over 20 years.

Oddly enough I "just" bought a 40 channel CB from a yard sale for $1.00. It is absolutely new in the box from 1989.

I bought it as a lark just to have it. Oddly enough it doesn't cause the type of RF interference as some used to do (That was a common problem). Just asking is the problem more acute on the AM Band or when you have a cassette playing?

Is your receiver separate and not part of a Receiver/Amp setup. {IOW} just a common AM/FM/ (?) type unit.

One place that you might look is that the chassis ground of the receiver is fixed only at the receiver. Interference could be definitely found if the Antenna has a dual ground at the fender, and the receiver. If so you will need to remediate the issue by possibly buying another antenna.
However before buying one test it out by pulling the receiver out of the IP and operating both it and the CB to see if there is any interference caused by the CB unit.
I thought that it had been common practice to include a RF filter somewhere in the receiver's chassis. Maybe after CB radio went out of favor some have not put such into their units.
MAXON-40 Channel 5 Watt Hand Held.
I'm going to try it out. Is CB radio that popular out there in TX?.

 

*****, I saw your post and it took a while for possible reason to rise to the top of my brain - kind of like the "really big chunks" in a cesspool.

Your CB radio is probably sending out a signal in a fairly wide spectrum, but it only has power in a limited band. Unfortunately, since your FM antenna is right there beside it, you're probably going to pick up the "slop over" in the CB broadcast. Someone right beside you in another vehicle might get the same result.

I used to have a radar detector that would go off now and then while passing a semi on the interstate - no police anywhere around. I think it was the same cause and effect.

I also, now and then, have gotten spark buzz from someone beside me that has poorly shielded/suppressed? spark cables.

I think it's called "spillover", and I doubt there's much you can do about it, other than try what 98Expy suggested.

- Jack

 

I'm a HAM not a CBer. It may be poorly made CB radio. Have you grounded the radio to frame ? You could try ferrite beads on various wires. Does it occur on all the CB modes ? AM, SSB. FM ?

 

Sounds like a bad ground on the cb

 

The CB's AM signal is getting rectified by the electronics of the amplifier portion of the radio.

Best thing you can do is what has been already suggested: Grounding and ferrite beads (especially on your speaker wires).

 

*****, have you tuned the SWR's on your antenna to your CB because if you havent it will cause bleed over also if you are running cheap unshielded coax this will also cause the problem you are describing. I have a peaked and tuned Cobra 29 in my truck that puts out about double what its supposed to and I have no bleed over in my truck.

 

CB radios are still proving to confuse the hell out of me. lol

as for tuning SWR, the only thing i have done is calibrated my radio with the built in SWR meter. is this what you are talking about or something else?

the coax I am using, i bought it at a truck stop. I am not sure on if i bought unshielded or not.

 

how should i ground the radio? by the negative power wire or connect a wire to a screw on the body of the radio and run that to the frame?

and what are ferrite beads?

 

You arent alone I have had a CB in my trucks since I have been 16 and they can drive you batty at times trying to get them to tuned right. Yes thats what I am talking about you should have a SWR no more than 2 and even lower if you can get it. You can adjust your antenna to lower the SWR and there are a couple different ways that you can do this and it depends on what kind of antenna you have. What kind of antenna do you have on your radio?

 

Run a wire from the ground screw on the radio to the frame of the truck. Ferrite beads , the snap on type, are snapped over wires to remove stray currents which cause the problems.

 

i have a 12' whip antenna that was on m truck when i bought it, whats the range on something like that, i wanna get a cb but i know litteraly nothing about them. what kind should i get. any helpful info would be good

 

Will Ill tune your SWR box for you today maybe that wil help who knows.

Maybe we should wire your cb power wires up through a 12v outlet plug like i did. Cuz I still havent had any problems with feed back like that.

Big Daddy Phil: I running a 10ft whip right now and its ridiculously tall. Kinda of made me made cuz me and willys5555 went to jack in the box last night and I had to remove the whip while it was ***** *** cold raining on me just to pick up some food. lol
I think the signal strength is alot better but i cant tell ya to be exact until willys5555 gets his fixed and we work on seeing how far our range is.

 

Any cb does the SAME functions. Its all down to price ive been told so many times on here. Some Cb's have built in SWR boxes some dont. Like mine I got from walmart it was 35 bucks I think its the cobra 29 its very simple to work not many buttons or switches to jack with and very easy to install. Willys5555 has a larger cobra version with a bunch of switches I have no clue what they do. Plus no matter which CB you get you will have the opportunity to run a PA system.

 

mine has the built in SWR. I figured out how to make it less...i still get interference but i dont here my self talking any more. I have Dyna-mike on mine and it had got turned up all the way. not sure how but thats what it was, i turned it down and now it just gets static through my radio. i can handle that though. lol