cb radio help
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FTE Chapter Leader
Joined: May 2001
Posts: 3,322
Likes: 20
From: Rhode Island
cb radio help
hey all...
installed a cb in the 04 F-250 while back.. and just finished getting it hooked up....
problem is im gettin engine rpm range feedback through the cb and im sure the feedback doesnt help my broadcast...
any help would be great...
installed a cb in the 04 F-250 while back.. and just finished getting it hooked up....
problem is im gettin engine rpm range feedback through the cb and im sure the feedback doesnt help my broadcast...
any help would be great...
FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
Probably the alternator. Buy supressor for it. Use shielded wire for power lead and as OBX says, hook power directly to battery - both power AND ground. Do NOT use crimp leads, strip and solder wires. Keep antenna leads as short as possible. Make sure your hood to frame wires are still connected. Vehicles today are nothing but a big electronic box. You need clean, bright, tight connections. Good luck.
PS I'll bet your AM radio has the same noise in it.
PS I'll bet your AM radio has the same noise in it.
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
A magnet that fits around the the RG58 or RG8U antenna cable. It some how reflects the signal that bounces around on the shielding.
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"Mifflin Clay"
Joined: Jul 2005
Posts: 3,177
Likes: 4
From: Mifflin, PA
Go to your local library and check out a copy of the "Radio Amateur's Handbook", it has a whole section on noise suppression. Might also look around to see if there is a local amateur's club, and make some new friends.
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"Mifflin Clay"
Joined: Jul 2005
Posts: 3,177
Likes: 4
From: Mifflin, PA
Originally Posted by BPofMD
Do Hams talk to CB'ers now??? WOW!! When I was deep into CB a hundred years ago, Hams wouldn't give a CB'er the time of day. 10-36 please?
Posting Guru
Joined: Feb 2005
Posts: 2,295
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Originally Posted by ReAX
Radio shack has them, and a ferite core will not hurt on the rg58 either. However, try making a few short loops of the antenna wire near the antenna as well.
What happens when you loop wire like that? You form a coil. Guess what? A coil will alter the characteristic impedence of the coax (which should be near 50 ohms), presenting a poor match to the radio and causing high SWR.
A ferrite core does the same thing.
Yes, both hurt.
Please learn some *basic* RF theory before making such comments.
FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
As coax is shielded wire, coiling a few feet of RG58 will do virtually nothing as far as reflected waves go. I've 'made' enough mobile antenna cords, either straight wire sets or RG59 (75ohm) phased dual antenna sets to know that a difference between a 1.2:1 or 1.5:1 VSWR means nothing. I'd be happy with anything below 1.5:1. One thing....if you do do anything to your antenna system, do check that VSWR just to make sure it's okay so you don't fry your transmitter.
If "CB'ers" are in the 10 meter band, they aren't CB'ers, they are in the Ham bands and require licensing by the FCC. Does it happen??? Dang right it does... but that don't make it right. At one time, CB too required to be FCC licensed. Guess those days are gone forever....I was KOD4972 for many years. And if you were a REAL cber, you'll be able to tell from what state I was licensed in.
Who knows the answer?
If "CB'ers" are in the 10 meter band, they aren't CB'ers, they are in the Ham bands and require licensing by the FCC. Does it happen??? Dang right it does... but that don't make it right. At one time, CB too required to be FCC licensed. Guess those days are gone forever....I was KOD4972 for many years. And if you were a REAL cber, you'll be able to tell from what state I was licensed in.
Who knows the answer?
"Mifflin Clay"
Joined: Jul 2005
Posts: 3,177
Likes: 4
From: Mifflin, PA
Originally Posted by BPofMD
As coax is shielded wire, coiling a few feet of RG58 will do virtually nothing as far as reflected waves go. I've 'made' enough mobile antenna cords, either straight wire sets or RG59 (75ohm) phased dual antenna sets to know that a difference between a 1.2:1 or 1.5:1 VSWR means nothing. I'd be happy with anything below 1.5:1. One thing....if you do do anything to your antenna system, do check that VSWR just to make sure it's okay so you don't fry your transmitter.
If "CB'ers" are in the 10 meter band, they aren't CB'ers, they are in the Ham bands and require licensing by the FCC. Does it happen??? Dang right it does... but that don't make it right. At one time, CB too required to be FCC licensed. Guess those days are gone forever....I was KOD4972 for many years. And if you were a REAL cber, you'll be able to tell from what state I was licensed in.
Who knows the answer?
If "CB'ers" are in the 10 meter band, they aren't CB'ers, they are in the Ham bands and require licensing by the FCC. Does it happen??? Dang right it does... but that don't make it right. At one time, CB too required to be FCC licensed. Guess those days are gone forever....I was KOD4972 for many years. And if you were a REAL cber, you'll be able to tell from what state I was licensed in.
Who knows the answer?
As to the ferrite core on the coax, it is used to reduce rf current flow in the shield or outer braid. Does little to the rf on the center conductor. Used primarily on power cords of electronic equipment (especially digital) to prevent rf radiation.
Senior User
Joined: Feb 2004
Posts: 181
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From: NJ
Originally Posted by BPofMD
Do Hams talk to CB'ers now??? WOW!! When I was deep into CB a hundred years ago, Hams wouldn't give a CB'er the time of day. 10-36 please?
I also ran 10-gauge ZIP wire (red/black) DIRECTLY from the battery to inside the cab. I fused BOTH + and - near the battery. The radio has a fuse on the + lead. Radio draws about 11Amps DC.