Matt B Posted December 11, 2007 Share Posted December 11, 2007 Breaker breaker, 10-4 good buddy, you got yer ears on, come back. Ok got that out of my system... I got hold of my CB, found a gutter mount and pole, got myself and SWR meter and patch cable and stuck it all together with my Disco - that's where the trouble started. I got an SWR reading of a high 3 so thought I'd trim my pole a bit - I now have an SWR of 10 so I've managed to knacker it. This means I need to get a new antenna. I had a shufty and apparently the bigger your pole the more popular you are with the ladies, no hang on wrong forum, the better transmission / reception you are likely to get. That being the case I want to get me a big pole, but I don't want to bung it on the gutter due to having it ripped off by rogue trees etc. I was wondering about mounting it on the rear bumper ot the rear door (spare wheel mount or such). What have you guys done? Matt Quote Link to comment Share on other sites More sharing options...
v8bertha Posted December 11, 2007 Share Posted December 11, 2007 I was wondering about mounting it on the rear bumper ot the rear door (spare wheel mount or such). Ph-narrr, ph-narrrrrrr.... big pole! IIRC it is much better to mount an antenna on a big flat area, like the middle of the roof. Something to do with reflecting signals? As it happens I have a stonkin great big roof rack, so can't do that. Instead I have a big clamp on the rear of the rack about a foot in from one side. Not has any antenna related issues On the Rangie I had a big mag mount in the middle of the bonnet. Quote Link to comment Share on other sites More sharing options...
Orange Posted December 11, 2007 Share Posted December 11, 2007 A quick search in the Discovery forum revealed THIS THREAD and others. You can't use the word CB, though, cos it's too short. Try 'aerial mount' in the search box and Robert is your fathers brother... As Dan has said, the best place is the middle of the bonnet with a mag mount, but the a RR bonnet is steel so it sticks. Gutter mounts get wiped out the moment you brush past something and the roof mount isn't an option for me as it's ali... HTH Adrian Quote Link to comment Share on other sites More sharing options...
Matt B Posted December 11, 2007 Author Share Posted December 11, 2007 Thanks for that - I tried searching CB+radio but didn't find that post. Nobody seems to be having problems with ground plane which is what I was really worried about. Matt Quote Link to comment Share on other sites More sharing options...
Happyoldgit Posted December 11, 2007 Share Posted December 11, 2007 SWR the antenna so you get the best reading at the midrange of the channels (for a 40 channel rig that means channel 20). If the SWR is higher on channel 40 than 1 then your antenna needs shortening. If higher on 1 than 40 it needs lengthening. You can sometimes recover whips that are too short by adding a spring between the antenna base and whip. Check for a good groundplane, connections, crushed co-ax etc. Quote Link to comment Share on other sites More sharing options...
Matt B Posted December 11, 2007 Author Share Posted December 11, 2007 Nice one! I shall give that a blast. Thanks Matt Quote Link to comment Share on other sites More sharing options...
western Posted December 11, 2007 Share Posted December 11, 2007 & look in the Tech Archive for the thread about SWRing a anteenna. Quote Link to comment Share on other sites More sharing options...
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