It looks like the PRM446 radios we have in the UK are not legal in Norway. They have ardios called KDR444
(
https://en.wikipedia.org/wiki/Personal_radio_service#Norway)
You will probably struggle to buy those radios in the UK. And if you could, they would be no use (and not legal) if you brought them back to the UK.
Norway appears to have joined the CEPT (European telecomms and postal union). So I would assume that any CEPT/EU band CB radios will be legal there. This is a block of 40 channels, often refered to as FCC, or EU, or CEPT, or 'mid block'.
It looks like AM or FM or SSB modulation, is legal and licence free in Norway.
The best reference I can find is:
http://service.alan-electronics.de/radio-passports/AM-FM-SSB-CB-Radio-Passport.pdf
Any UK band CB sets (often marked CB 27/81) will not be legal ousude of the UK. This was the band we were granted in 1981.
Generally, CB radio will work over much greater ranges than the UHF handelds. And will work better around obstructions (hills) .
Vehicle mounted antennas are best. Handheld antennas are a big compromise, so will be limited in range. But still better than UHF.
There are lots of CB sets on sale on ebay. Alan seems to be a big manufacturer of them these days. And even cheaper radios will often do many of the bands, the CEPT/EU band and the country specific ones. And can do multiple modes. So you can talk to anyone, whatever CB set they have, on future events.
Just make sure that the everyone in the convoy has radios that can do a common mode.
Antennas.... Basically the longer the better. Mounted as high on the vehicle as poss and as central as possible. But don't get too hung up on that, if not cenvenient. And you need a good earthing to the car body.
So ideally a mount drilled through the roof and biting through the paint on the underside. But if you don't want to do that, then mounting a gutter clamp, or boot lip clamp mount, with a short (less than 9" would be fine) bit of wire to ground the base somewhere to the body.
Magnetic mounts are not too bad. But get the bigest and strongest you can. It saves having it dragged along your roof, if the wind or a low tree catches it. Also the big footprint helps the mount get a sort of grounding to the bodywork (without an actual connection).
Shorter antennas will still work, but reduced range. If you only run in tight convow, that would be fine. But if you get separated by more than a few miles, or there is a hill between, then you will start to struggle.
Taking 12volt power from somewhere in the car should be easy enough. They only take a couple pof amps on transmit and hardly anything on receive.
If your lighter socket is live all the time, this would be fine, if you can find a reliable plug. Or just tag some wires directly off the back of the socket to the CB. If the lighter socket dies when the ignition is turned off, you can't easilly leave the radio monitoring when at camp etc.
And use a fuse in the live (positive), please! Ideally a fuse holder in both the live and ground (+ve and -ve) power leads. If a fuse pops, you have something very wrong. Probably mixed up your ground and live. But a popped fuse is better than a damaged car loom and burnt up CB set.
Sorry to go on, but have seen it sooooo many times.
You may find that having an external plug in speaker is useful. it helps you hear in the vehicle, and when at camp, you can hang it out of a window, and listen for calls
Hope that helps.
Little correction to that PDF of the CB allocations in Europe....
Since that was published, the UK have allowed SSB and AM on the EU 40 channels.
So should read:
40 FM UK + 40EU FM/AM 4watts + 40EU SSB 12watts
