Laning Essentials... PMR or CB radio? 

Low frequencies = long antenna, high frequencies = short antenna. The limiting factor for the CB is that dinky antenna. A quarter wave antenna for CB is around 2.5m long! For PMR a quarter wave antenna is arond 16cm! The antenna will work better on the PMR as its more toward its proper length. An external antenna for CB mounted in the centre of your roof your results would be wildly different. 🙂

Cool. Video. Maybe you can make an Test with the " Team Duo Portable 2 / 70 PMR / Freenet Mobilgerät. ". I think this is very interessting for you.

I recently bought an old used RMR446 by Logicom, and i was shocked by the range, i got solid reception at 5km (it was suposed to be the limiting range) i actually got 8km if i got a good ground clearance, i'm sure i could get 10km from a hill too just don't use it from inside a vehicle, well you could get a 2km range from inside tho. as a new beginner radio amateur i was looking forward to get my hands on a VHF 2way handheld radio and I looked down on PMR446 as just weak toys, but i'm actually pleased by how useful and convenient they are, plus you don't need a license for them. more tx power won't fix obstacles and obstructions much

I use a 42 Multi as my main CB radio in my car and I'm getting great range (20km +) on AM, as much as friends with "normal" CB radios. The antenna on my car is a 1.55m whip. By the way, 0.2 miles is 320m, 1 mile = 1.609 km so 0.1 mile = 160m.

Where roof bars or roof rack are fitted i modify panel mount antenna brackets to bolt to or clamp around the bars, and in a way that i can still just remove a lock nut to keep the coax in the car when not in use. And a weather cap for when i leave the coax and just remove antenna.

Interesting test

Get an amateur radio license guys then 50W on 2m/70cm will solve all your radio communication needs 👍

FM range is just beyond line of sight, any dips, hills, buildings even snow and ice will attenuate the signal. On the right terrain that midland on HF could do over 15 miles with its 4 watts and correct antenna, the PMR radio only operates at 500mW (1/2 a watt) UHF shorter range. I have often worked over 25 miles with my VHF HT. Height is Might.

Most of what I am about to say has already been touched on, the dial a match antenna on the freelander aren't renown for being that good, but it should have trounced your CB hh, I would suggest changing it for a large springer antenna as a CB antenna wants to be "electrically" 9 ft in length, so a bigger antenna will work better. There are plenty of better CB antennas such as Wilson, Sirio , k40 or firestik, they will be very efficient but don't like hitting trees. The pmr radios work on 446mhz so their efficient antenna size is only a few inches. So the handy antenna is closer to its ideal size. You said you were looking into ham radio, also consider a simple business licence no technical tests, 4w hand held radios as opposed to 0.5w pmr446 and you could use external magnetic antennas to improve performance even more.

Good video, but PMR is really only for shops and kids it seems.

I would go for a set of boafeng uv5r handhelds and an antenna adapter to a mag mount, maybe a speaker mic too. Plenty good enough for green laning, and still able to quickly switch back to stock antenna and take with you on foot. I much prefer pmr446, too much noise on cb for me. Crt space u. Crt micron,(same radios available under other names). 2 good cheap options for vehicle mounted.

The wavelength of CB is some 11 metres and if used inside the car it's like using the radio in a Faraday cage. You really need external antennas and if used on both cars a range of several miles will be achieved. I would recommend a magmount with 1.5 metres whip on both cars and you will be amazed at the range. The PMR radios are on UHF with a very short wavelength that escapes through the window apertures. These are great for car to car over half a mile or so. Just seen you have cb installed on the cars but I can't understand why they have such poor performance on them.

What about built up areas what would the reception be like' as your in a field with no buildings.

Just do what most do and use a 'ham radio' boafeng is cheapest option, and despite being cheap and Chinese is great value for money. And the "Crt space U" is a good vehicle mounted option.

Interesting video and test. I still need to run mine in anger and am itching to do a test but am yet to find anyone local. Mine is a car unit Thunderpole T-600 and Mini Orbiter but would like to figure out what distance it is capable of line of sight and out on the lanes or roads.

Was a very interesting test, gutted I messed up the footage on my camera 😂 Will get a permanent system fitted to the P38 and do some more test with that and your Disco. Question the midlands in the FL2 is that still dying? Hopefully the new one in the Disco is stronger

Squelch turned up to high and rf gain not turned up we have had qso to grand canaria to a guy using 4 watts hand held to a silver rod antenna to the midlands

Hi thar whot you need is a ssb radio in the 4x4s

So you only got out less than a mile on line of site. 1.29km is rubbish. How many watts was you using on the pmr please and I’m sure the CB is 4 watts… get a K40 and put it on a mag mount in the middle of the roof as will give a fantastic ground plane for the CB. My PMR is a Quangsung k6 with a great a 2mtr/10mtr antenna which put up full telescopic to 27htz. Great video.

would have also helped if you could stand still hahah

Why are you trying to convert to metres??? In the UK we use miles for distance, makes no sense to use metres for this....

something wrong with your first radio. i reach so much much far far further on the same cb ,yes even to other countries ..but different antenna

Comparing CB with PMR: CB is 4 Watts on FM (up to 12W PEP if you use single sideband) and PMR is 0.5W CB is on 27-28MHz, which is HF (bordering VHF), and PMR is on UHF, 446MHz Lower frequencies need larger antennas so CB needs a larger transmit antenna than PMR Assuming an antenna is the proportion of its wavelength e.g. a half-wave dipole in free space a both ends, then a lower frequency will travel further. In practice a long wavelength antenna is usually massively compromised because there is no space to make it full size. On the CB bands there is more natural noise (hiss and crackle) and also long distance stations interfering from Europe and sometimes the US (some of them run insane amounts of power, illegally) PMR radios must have non-detachable antennas whereas it is possible to choose a good CB antenna and attach it to a car roof etc PMR frequencies can go through windows better because of the higher frequency and shorter wavelengths, so a PMR will sort of work inside a car. I don’t think CB would, though I never tried it All in all it depends how they are being used. Height and line of site is definitely a big factor at both CB and PMR frequencies. CB will probably cover more distance in more situations. I used to easily reach Basingstoke from Southampton using a 23 foot 5/8 wave back in the day.

Far to many variables in your test. But still interesting...

PMR446 is a waste of time and money, the 500mw output restriction and mouldered fixed antennas make these radio useless, why they didn't give a couple watts I'll never know. The cb radio at 4 watts will give much better range but using either radio you really need an antenna mounted on the vehicle and SWR of 1.5 or less otherwise you will loose all you power, the antenna on your vehicle is absolute pants, I would recommend Sirio 27 or Sirio 4000