Hi all, fitted my new cb radio today and tested it with a mate in his landy mine seems to cut out at 30 yrds. I can Cleary hear him but he can't hear a word from me? I've got a 5ft ariel onto body mount with the lead connected to that then straight to the unit ( TTI TCB 550) anyone guess what I've wired up wrong? Or common faults? I have not yet got out with swr and tested. Thanks. P.S there is no problem with his unit just my end.
CB unit cuts out at 30 yrds?? wat have i done wrong?
- Thread starter MaxyMan
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baggyjim
New Member
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do not use it again until you have checked the swr as it sounds like it is way out, continued use will fubar your unit
Mark L
Well-Known Member
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Sounds like a bad earth on the aerial.
Was having this convo with Deasy tonight, and apparently, a common problem is people earthing their aerial to an alloy body or part of when it should actually be earthed to a steel point, ie, the chassis.
Try re-earthing the aerial - see how you get on and report back.
Was having this convo with Deasy tonight, and apparently, a common problem is people earthing their aerial to an alloy body or part of when it should actually be earthed to a steel point, ie, the chassis.
Try re-earthing the aerial - see how you get on and report back.
baggyjim
New Member
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- gillingham dorset
Sounds like a bad earth on the aerial.
Was having this convo with Deasy tonight, and apparently, a common problem is people earthing their aerial to an alloy body or part of when it should actually be earthed to a steel point, ie, the chassis.
Try re-earthing the aerial - see how you get on and report back.
mine is earthed to the roof panel of my 90, cleaned off area of paint no probs with it so far and get a low swr reading
Mark L
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Excuse my ignorance, but what does SWR stand for?
Yeah tht might be were I'm going wrong. I have the main input signal from the top bolt on my Ariel body mount then a second part of that cable which is connected to what looks like mesh that runs around the cable onto a second bolt, this second bolt is not connected to the ariel so its not that. Am I being stupid and have no earth comming of my Ariel??
Mark L
Well-Known Member
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Ah, ok.
I ask because I had a similar problem with my CB when it was wired into my old Disco, and, as it happens, I'm fitting it into my current Disco tomorrow - ready for the weekend.
Although at the (much) cheaper end and entry level of the market, it's not a very old CB at all so am hoping the aerial and earthing of - was the issue.
I'll report back once fitted tomorrow.
I ask because I had a similar problem with my CB when it was wired into my old Disco, and, as it happens, I'm fitting it into my current Disco tomorrow - ready for the weekend.
Although at the (much) cheaper end and entry level of the market, it's not a very old CB at all so am hoping the aerial and earthing of - was the issue.
I'll report back once fitted tomorrow.
theres an inner and an outer on the co-ax.
the inner goes to the aerial and also the centre hole in the rig.
the outer goes to the aerial base (to earth the groundplane) and the centre goes to the rig earth where you screw it in.
you need a substantial ground plane to get any distance out of a cb (it also helps when setting the swr)
thats why it's not brilliant when attached to bumpers or nudge bars, they are better in the centre of a metal roof.
Pikey
Dummy Ejection Facilitator..
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nowt wrong with earthing to an Alloy body at all I had a PSM?? Mount on the 90. and had an swr. of 1:1.5 well within range. and could chat to peeps upto 10/15 miles away.Sounds like a bad earth on the aerial.
Was having this convo with Deasy tonight, and apparently, a common problem is people earthing their aerial to an alloy body or part of when it should actually be earthed to a steel point, ie, the chassis.
Try re-earthing the aerial - see how you get on and report back.
Coax as said needs to be properly fitted to a proper plug. at both ends and preffereably soldered on.
RF Interference. ideally you want the cb wired direct to battery. and if the problem continues a suppressor fitting.
Personally I'd find someone who knows what's what and get them to install it properly. or failing that take it to an autoelectrician.
The end that connects to the unit is proper job like that diagram just not the end at the aerial. Also what is it ment by tuning it, all i was told was this "You will need to check your SWR after you've fitted the system - if you don't you may have a pretty lousy range of transmission or damage the unit"
Pikey
Dummy Ejection Facilitator..
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nope that's a PSM mount nowt wrong with it at all make sure that the plastic spacer is fitted to the bolt supplying the centre feed. in order to prevent it from earthing to the body. Make sure you have the backing plate fitted and that all the paint is removed from the inside of the tub where the plate is located.
