The Mitsubishi Pajero Owners Club®

smidsy · Posted: Sun Jul 03, 2011 15:11 Post subject: cb doing my head in

right had to change my antenna on my cb so put conected the mirror clamp to my roofrack and when i put it on the swr metre push the talk button the metre goes all up to the right on set then switch the metre it goes higher in the red so then put it back where it was on a gutter mount on my door and it still does the same any ideas why its like that any help appreciated .

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neil-tce · Posted: Sun Jul 03, 2011 15:23 Post subject:

Sounds like poor earth..

Or antenna is in need of adjustment..

but i could be wrong...

smidsy · Posted: Sun Jul 03, 2011 16:05 Post subject:

ive put new antenna cable on and everything i cant believe the bloomin thing i had it perfect then got the roof rack and now i cant get it set up at all

neil-tce · Posted: Sun Jul 03, 2011 16:10 Post subject:

Yep. been there myself..

spent 3 weeks on and off trying to get a cb to work... eventualy i got it to work, but could only get out 1/2 a mile, so threw it in the cupboard...

then when i got a tractor on a farm, that was just for me to use, got cb out, put it in tractor and it worked without any problems..

got another for my landy i had at the time, and that worked no probs..

bought new one for my paj. made a bracket to bolt on a frame at the front, works perfect..

never did find out whet the problem was.. they are very tempermental.. and have to be right..

smidsy · Posted: Sun Jul 03, 2011 16:29 Post subject:

yea im starting to get that idea lol

AJRS · **** Joined: 18 Sep 2010 Posts: 446 Location: Sussex

Smidsy, check the inner core of the coax isn't going to earth. You may have earthed the aerial to the bracket or something. Without looking to check, I think it should be isolated from the bracket by a shaped plastic or fibre washer.

shaunandelly · Posted: Wed Jul 06, 2011 7:27 Post subject:

Do you have a magmount? Can you plonk it somewhere else and get a reading ?

Firkhamhall · Posted: Wed Jul 06, 2011 11:53 Post subject:

It's also possible that you have accidentally nipped the coax breaking the conductor or allowing the shielding to break through the isolator so that there is a connection between that and the conductor of the cable?

Take the PL259 (the antenna plug) out of the back of the CB and set a multimeter to continuity. One probe of the meter to the centre pin of the plug and the other probe to the whip of the antenna. The meter should buzz or indicate zero (depending on setting) This is correct. If there is no connection, no buzz or reading high resistance, then the conductor is broken somewhere. If your antenna is body mounted, i.e drilled through the car or fixed to the body by a bracket, then touch the probe from that you had on the antenna whip, to the car body. There should be no buzz or a high resistance reading. If it does buzz or show zero, then your cable is shot (or plug shorting). If it's a mag mount antenna, take the rubber cup off the bottom of the magnet and touch your probe to this. Again no buzz or meter reading high resistance, anything else the cable is shot or the plug at one end or the other is shorting.