CB Radio (1 Viewer)

[Jaws]

You could always pop a cheapy rubber duck in the holder if you sell.. that would baffle em !!!

 

[bigfoot]

What do you do with a Hymer? My old 544 had the 'D' type mirror bars and it was easy to fit a mirror clamp. My new Exsis has 'coach type mirrors. I used a 'spider' ground plane that fitted between the antenna base and the mount. I would want to use this for 2m & 70cm as well as CB.

 

[DanielFord]

@Jaws Totally forgot about this thread, the rig is all fitted. The mount was really quite sturdy, solid plastic with a gasket on the outside. The metal plate that goes inside has "claws" to bite into the body and give a good contact.
I will get some piccies up as soon as I can.

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[34127]

Used to enjoy the old AM CB radios but lost interest when the FM type came in - and it became legal !

 

[Jaws]

What do you do with a Hymer? My old 544 had the 'D' type mirror bars and it was easy to fit a mirror clamp. My new Exsis has 'coach type mirrors. I used a 'spider' ground plane that fitted between the antenna base and the mount. I would want to use this for 2m & 70cm as well as CB.

Those spider things are not exactly great unless they have changed an awful lot.
Are the legs still just solid ally or do they have coils now ?
A ground plane needs to be at least a 1/4 of the frequency it is to be used on.. so if not a sheet of metal then the rods would need to be almost 9ft long to actually work well !

You can 'kid' it all a bit by using coils but even that is a compromise and makes it very difficult to get a decent standing wave ratio even across the standard 40 channels :-(

 

[bigfoot]

Those spider things are not exactly great unless they have changed an awful lot.
Are the legs still just solid ally or do they have coils now ?
A ground plane needs to be at least a 1/4 of the frequency it is to be used on.. so if not a sheet of metal then the rods would need to be almost 9ft long to actually work well !

You can 'kid' it all a bit by using coils but even that is a compromise and makes it very difficult to get a decent standing wave ratio even across the standard 40 channels :-(

They are coiled,like rubber ducks.

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[Jaws]

Excellent.. Still a bugger to set up though !
For a while back in the 80's I made and sold all sorts of antenna for mobile application with both cb radio and on the various amateur bands..
Somewhere I still have the calculations to work out the 'q' ( goodness ) of a coil at any given frequency.. And as said, the more coil lthe less 'Q' and the worse the band width !

 

[DanielFord]

@Jaws I have been having a David Bailey moment this afternoon, so finally, this is what the mount and aerial look like when fitted:

 

[jollyrodger]

Neat fitting hope it works OK for you now all you need is a Muppet handle

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[Jaws]

Nice neat job.. what is the tuning like ?
I ask as with that big coil close to the body I am wondering if it is having any effect ?

 

[DanielFord]

Nice neat job.. what is the tuning like ?
I ask as with that big coil close to the body I am wondering if it is having any effect ?

It got a respectable SWR when I tested it, but I suspect that it does affect it slightly. I am getting reasonable range, so am quite happy with it

 

[Jaws]

Well what more can you ask !
Currently gone with the lip mount but may well change to one of those little buggers !

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[DanielFord]

Well what more can you ask !
Currently gone with the lip mount but may well change to one of those little buggers !

It was really easy to fit, the only tricky bit was the insulator on the top bolt is a very tight fit, but with a lot of swearing and brute force I got it into place

 

[mjltigger]

It was really easy to fit, the only tricky bit was the insulator on the top bolt is a very tight fit, but with a lot of swearing and brute force I got it into place

On my discovery I had the whip on the top gutter.. had to fold it to go in car parks etc or it made a right racket.. The transit has gutters as well at the bottom of the hi top so may sneak my cb in this weekend while the other half thinks I'm fixing the leaky skylight in the wc

 

[Jaws]

Not gutter mount ( wish I could but would be up at silly feet and catch on all sorts of over head stuff on the MH !! ).. It is a lip mount that goes on the edge of the bonnet
I have a quick release attachment on it too, so when parked up it is a simple push and twist to remove

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