Walkie Talkie 27km Range Test - PMR446 0.5 Watt

A line of sight 27km signal test of Motorola and Retevis PMR446 and dPMR446 0.5 Watt walkie-talkies.
This test uses the Motorola XT420, Motorola XT660d, Motorola TLKR T80 Extreme and the Retevis RT24. It was filmed between Selsley Common, UK (elevation 200m) and Tidenham Chase, UK (elevation 200m).
All devices were fully charged and we used PMR channel 07 with a CTCSS of 107.2Hz.
Thanks to Steve for his help.
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#rangetest #pmr446 #walkietalkie
Thanks for watching and please let us know if you enjoyed the video.
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[@tdcattech]

Buy RT24 - geni.us/rt24 • Buy T92 - geni.us/motot92 • Buy XT420 - geni.us/xt420 --- Support the channel by using these affiliate links. Thank you!

[@ReganMarcelis]

Thank God the U.S.A. Unloaded millions of copper needles into mid orbit in the 60's "to see if it would work" - it did.... Google it!

[@torpe1]

i wonder where you got the RT24 for £20 a pair?

[@thomasm5714]

That's very impressive. Assuming a uniformly spherical radiated output of 500mW by the transmitter, and a surface area of 10cm squared for the receiving antenna, the power received at 27km is just 1/18 of a trillionth of a watt. It's a good thing radio waves don't travel at the speed of sound, otherwise you'd have been waiting 2 minutes and 38 seconds for a response.

[@tdcattech]

Loving the extra stats! 👍🏻 No idea the working for the first one.

[@richardmoore8036]

Geek

[@XXXXXXXXXO]

Thanks for the test! :-)

[@luish19779]

So nice... when I have 13 years old I speak with someone from Mexico and I was in Puerto Rico... in base with my Cobra...great memories

[@officiallynmotion7100]

Epic test Brothers. Please more

[@brianshanahan3878]

The beauty of having totally clear line of sight between the two!

[@mensagemii744]

However, very long distance for 0,5 W and short antenna.

[@nickmo439]

They found that spot where radio makers test the range of their radios 😀

[@dare-er7sw]

Haha

[@mingzhu8093]

Exactly! This test is pointless.

[@MOperator]

@@mingzhu8093 no? 27 k in a 15$ radio is huge, makes you think how far we got and how we take things for granted

[@gowdsake7103]

@Afg Tunes Quality wise pay more money, range there will be little or no difference

[@fidelcatsro6948]

hahahaaha lol

[@Plasterofparis69]

AGAIN: the first reasonable range test on KZbin !!! congratulations👍 I wrote that already at the 10 km test. I use the TLKR T81 Hunter and I like it a lot! I think it's just as good as the TLKR T80 Extreme. Greetings from Switzerland

[@tdcattech]

Good to know you liked the video. Thanks for the feedback on the 10km and this range test. It looks like we're going to have to go further!

[@Plasterofparis69]

@@tdcattech Finally, there are problems with the curvature of the earth ...

[@tdcattech]

I've recently done some investigation into this. Based on reasonably accessible terrain within England / Wales, the furthest these tests can possibly be is about 120km. Past that point, we end up dealing in atmospheric stuff...which is not what I'm testing here. I'm after *reproducible* tests here.

[@michaelloughlin734]

@@tdcattech looking forward to that mission.

[@ahmadsayem]

Appreciate your efforts.. thanks

[@bunston1000]

Weather conditions can play a very important part, particularly at uhf / vhf frequencies. I remember in my early days with my ham licence, working a GU4 station in St. Peterport iGuernsey. I was using a good old Trio Tr 2300 on 145 MHz with one watt of r.f. output in the centre of Chichester, West Sussex. The contact was very clear, with just a hint of background noise.

[@delboyonline]

Interesting tests, I did similar tests in the late 90's/early 2000's but unfortunately that was before KZbin 😁 It's amazing how far you can get on these little radios.

[@tdcattech]

Indeed. Before everything had to be captured on video. Early days for PMR446 too. It was a fresh new allocation then.

[@delboyonline]

@@tdcattech First radios I bought were Goodman's Trackers, cost £100 for the pair. Still got them and they still work 😀

[@beedslolkuntus2070]

delboyonline Wow then

[@ukd8387]

Great test !!!

[@arkadiuszweiss]

Great radio stations, in the past 70 cm band was reserved only for the most important government services. Mass production of the device at one frequency allowed to reduce costs and you do not have to pay 10-30 times as much for a full band radio, often with a lower sensitivity of the receiver. Wonderful devices, the peak of human scientific possibilities. I greet you :-)

[@casavilla458]

Great job on the field testing here where I am in America I have a similar version Motorola t631 it has farm/gmrs frequencies 0.5 and 2.0 watts maybe the extra wattage could provide a stronger signal but even at 0.5 Watts still amazing that it was able to transmit and receive at that distance

[@gowdsake7103]

The power doesnt even really enter into it its the clear line of sight

[@donalderickson-si8ww]

that radio has a 1/2 watt transmiter in town 1 mile or line of site out of the box

[@ahmads6674]

Tess.. good job. Nice and like that redio. Ahmad from Indonesia listening

[@danielbeller972]

Very nice video!

[@michaelcarey]

Great test! It goes to show that line-of-sight is king! :-) This is why a LOT of money is spent putting radio/TV transmitters and two-way radio repeaters on top of tower on top of hills/mountains! :-)

[@donalderickson-si8ww]

sorry thay are all on towers no mountens minimum height is 150 ft over that you need a light on top for air craft

[@donalderickson-si8ww]

how about just having a 150 ft tower and put the repeter on that just like the police and fire service do everyday

[@hidenfn]

Awesome video dude, quality is great :D

[@tdcattech]

Thanks! Glad you enjoyed it.

[@jobesp183]

Line of sight and location is the main thing in RF coverage optimization, Great job,

[@qsdrfghgujfddyffguff]

Superb testing very helpful video

[@jonmac3995]

Yes location and line of sight is the main thing, I regularly receive the data from Weather Balloons on 404 MHz, at distances up to 400 Km, and they transmit only 60 mW. They are of course very high above ground, up to 30000 Metres.

[@emilferent23]

Thanks for this test!

[@tdcattech]

Bit of fun. Obviously, this doesn’t show real world use or performance.

[@programatempodevitoria2320]

Xt420 e xt660d se sairam bem demais!!! E com outro de 0,5 watt se saiu bem e teve grande êxito. Congratulations!!! Great test!!! Sem deixar de falar que em certas frequências; altura é tudo!!! 1hug

[@grenaldalves]

so the boxes arent lying ... great test guys

[@donalderickson-si8ww]

38 miles is done on are G M R S channels not family service

[@okhamradio]

Good job 👏

[@osmanlitorunu9585]

Hello...Very Good Video Thank you very much👍

[@cronaldoefe]

Very Good video thank youu ❤️

[@MartinProavis]

Clear sound!

[@NoHandleNameScrewTube]

Magnificent! At first I was like hmm .5 watt walkie talkie this should be funny. I was surprised the test went so well. Got me thinking to put a walkie talkie antenna on my cb tower once I can afford the coax lol haha thanks for sharing.

[@johansmitphotography]

Is CB 2m or 70 cm. If not it would not be possible.

[@PD-ws7tn]

I made even longer distance pmr communication, approximattely 50km. From higher altitude, some 800m above sea level, to the town located also on high altitude. If you can achieve to have line of sight at least if there is no serious obstacles, you will be able to communicate at long distances, even more than 50km.

[@mikesey1]

I had a chat with a bloke 51 miles from my location in Somerset ( he was 20 miles north of Cardiff)

[@russelpasamontehabla]

That's how you do range testing!👍👍👍

[@olehstarchak]

Very good!

[@W0LF-Pak]

Enjoyed this video very informative field test.. and additionally your other similar PMR/dPMR reviews. I live very local to where you conducted the tests so appreciate the terrain over which you were Tx/Rx. I'm looking to purchasing several Motorola radio's but cannot decide between the XT460 or XT660D. I feel the XT660D would provide some future proofing with the additional benefits that digital provides, but would appreciate feedback from yourself or others that have previewed your field test.

[@tdcattech]

I have a couple of XT660D radios for sale if you're interested. :-)

[@allsortsabouteverything]

Problem with digital is it can be switch off in times of crisis whereas analogue can only be jammed and that is only if in line of sight so multiple jammers would be needed for blanket coverage in a given area. Food for thought.

[@conrad13579]

Great test. I did a similar test at 23km, from a hilltop of 200m elevation, in the tropics on a highway stretch..It was successful. I used the roof of the vehicle as an antenna range extender. no wires, just as a reflective surface at ground level to compensate for the curvature of the earth.

[@lt4324]

ITS CALLED "White noise" when a signal is weak and or breaking up just above the noise level, You can do 100KM if not way more depending on the power and clear line of sight path. I have worked stations 500 miles away with 1/4 watt on UHF as long as you have line of sight! otherwise great video guys! thanks for posting! 73 DE KD6SBR

[@lukeuzzellbryan3883]

White Noise sounds a bit racist

[@MladenMijatov]

Very very very important thing is to keep the antenna vertical. Radiation these antennas make is perpendicular to its position. If you keep the radio horizontal all the signal is going to the outer space instead of other radio. XT420 is a professional grade radio so it probably amplified weak signal or at least cleaned up reception.

[@LZ1SSA]

Световния рекорд на пиемерки е малко над 500 километра. Понякога при подходящи условия, при радиовръзките ,стават чудеса... Прекрасно видео. Благодаря

[@t4om154]

Not sure where you guys are form, but here in North Yorkshire at Sutton Bank YO7 2EH. I've had contact on 446 - 0.5W all the way to Aysgarth (33 miles away) 53km in the Yorkshire Dales 1000ft high to about 1300 high, both places accessable by road and both have a phone signal to text that you have arrived. Both is like of sight with no obstruction

[@tdcattech]

👍🏻 Good result. What we were aiming for here is two people on the same handhelds (no external or car mounted antennas) and a test we could reproduce (not related to weather or conditions)

[@ApocGuy]

holly s**t :O. i knew that those tiny PMR's arent that bad (tested few motorolas with line of sight up to 10km) but this...wow.

[@stfuplsok]

*PMRs

[@RingwayManchester]

Really enjoyed this! Nice one! If you're up in the north west again let me know I'll do a test with you

[@tdcattech]

Glad you liked it! These take a fair bit of effort to film so it's great to get positive feedback. 50km+ gets tricky due to logistics and finding a clear frequency but I already have a few ideas. :-)

[@alexderpyracc4053]

@@tdcattech well channel 9-16 are free most of the time due to nobody else really owning a radio that has all the 16 frequencies available now the retevis rt40 makes use of the new 16 channel frequencies most of the time 8 are used for anologue and the 9-16 for digital but the rt40 also does anologue on 9-16

[@canadianobserver7467]

I have been recently testing the Motorola T600 H2O. At 6km getting white noise but still no problem hearing the other person. The range had a forest and 2 large hills between us. I haven't gone for distance yet.

[@zaheerhaider2812]

Good thought

[@ieuangwynne7736]

amazing

[@user-io4gb6zq9q]

Wonderful

[@michael.speaks]

You should try this is the Mediterranean in the spring. They have something called the Mediterranean effect, which creates a tunneling effect for radio waves in the lower atmosphere, leading to crazy distances. I once stood on a hill on the island of Menorca in April and talked to a guy at the beach in Barcelona. We each had 5-watt radios. The distance was 220 kilometers. The best DX from that location was about 600 km with a person in Genoa, Italy. He was on a proper station, though, with a beam antenna and probably more than 10 watts.

[@nativetexan9776]

I saw two things that is affecting your contact. One is, some of the noise is a little wind noise across the mic. Two is, moving around from one place to another. Even by turning around and facing a different direction will change the reception. A step in any direction can change the quality of the signal. Could make a bad signal better or a good signal bad. I always find that "sweet spot" and stay there.

[@SAVVASASLA]

παρακαλοει να εχει και μια δοκιμη ποιο χαμηλα στο επιπεδο του σπιτιων ευχαριστη

[@barneyquinn3657]

Power is so deceptive. Obstruction losses and antenna systems are by far the greatest factor in transmission range. For example, 1 watt is +78 dB. 1/2 watt is +75 dB. Doubling the power only increases the signal by 3 dB for each doubling. A 2 watt transmitter puts out +81 dB. A 4 watt unit is +84. 8 watts is +87. The path loss formula is L = 32.2dB + 20 Log F + 20 Log Distance. Try transmitting from inside a shopping mall and you're luck to make it to the parking lot let alone 27 km.

[@webmastercaribou7570]

As long as you have line of sight, no problem. Try in heavy city rf environments and deep woods and one half a mile will be your maximum range.

[@martindx1120]

can confirm lol, i recently went out on a walk to a nearby hill to test my radios out, i tried transmitting around 500 meters from my house but nothing was picked up. when i arrived at the hill (which is around 2km away from my house) i tried transmitting again and this time the signal was picked up.

[@oudotcom]

Please try even more range ! Thanks ! Good background music also ! Can you try to run on more than 0.5 Watts for just some tries ??

[@W-733_KWX]

If the path is in the clear it can really go FAR at VHF and UHF ! Just reminds me of a QSO on a repeater on top of a hill at 1000m ASL (me at 200m ASL), I was 60km away and 20mW output on my HT Yaesu FT51.

[@gowdsake7103]

Precisely, try explaining that to a flat earther tho !

[@alvinfreeman8838]

😂😂😂

[@user-dn4sr1rp7r]

Just rescued a pair of those yellow ones from the bin. Will give it a try.

[@arvyvyar]

wonderfull

[@willemfloris]

Wow you found a great spot to do the test so close to the road...☹️

[@saadhnor6555]

Great.

[@MeineVideokasetten]

Ehehe. Great Video. I like how he's grining about the first contact 3:28 :). So: Can we hope for a 50 km range test? This would be cool!!!

[@stfuplsok]

*grinning

[@markus4692]

You just can't beat the RT24 price wise, I have 18 of them and never had a problem with a single one of them. And we also use them in bad weather. Would be interesting to see how far you could push the RT24 when changing the output power from 0,5w to 2w. Can be done with the programming cable and the retevis software. I never tried it cause I only use them within a range of 3km.

[@fc1133]

Amazing what 0.5 watt can do. Too bad that you only get this kind of range where there is nothing in your way. Any videos where you test the range in a Town or so? Thanks. EDIT: Never mind. I just checked your channel and found a few videos I was hoping to find. : )

[@jason_berns]

Line-of-sight condition could greatly enhance radio signals. At least one or both should be in a higher location to fully utilize the quality of signals. Environmental factors (air moisture, reflections, radio signal generating devices,etc) can greatly influence radio signals,too. Thanks for sharing.

[@donalderickson-si8ww]

here is a simple test draw two circles if thay don't over lap one your out of range

[@BarefootBeekeeper]

In Devon, we call that the Midlands.

[@terrymac9570]

That’s a great test next Dartmoor to Bodmin moor.

[@stfuplsok]

NOTE: this only means that the cheaper brand (e.g. Baofeng) or the more expensive brand (e.g. Motorola) of 0.5 watts FRS (US) / PMR (Europe) radios/walkie talkies are ALL the SAME (i.e. in range/s). the only difference is their form/style/design factor.

[@tdcattech]

Correct. Don’t worry about comparing range between PMR446 devices. They all perform the same.

[@kayli3294]

Nice Test. If there is free space between you two it can go much far. Give it a try ! You can talk to the ISS Spaceship with 5W output. it is going around ~400km above with HAM Radio Gear. 73 DM5KS

[@tonsmulders5218]

I use the Wouxun KG-UV9D 5 watt PMR and also LPD on it, works perfect, but also amteurfrequenties and lots more.Great fun.

[@tonsmulders5218]

@Steve Terry I know, but it works perfect, anyway, i am always good to receive for other stations.

[@Mulazim.]

All transceivers are same performance as we made such tests in 90's on YAESU FT-411, ICOM,ALINCO ,BALCOM & KINWOOD all the same performance approximately,but i like YAESU transceivers,because of the software and their shape were better than others at that time...

[@mikepeirson1150]

Good line of sight is why.

[@Little_Alesi]

Range test in a Range ;)

[@mikesey1]

Right, well I've had a great copy between Glastonbury and Barry, in S. Wales.... 30 miles.

[@justinmiranda8815]

how much trouble is radios they look awesome

[@gowdsake7103]

well yeah your 500 foot up

[@alexderpyracc4053]

I reached 45km from Terschelling to Leeuwarden on pmr446 using 0.5w retevis rt40 radios I was standing on the beach and the propregation was really nice that day

[@stratigointernational662]

alex derpy racc Hi! That was on a digital channel or analog? 😊

[@marcelmollema2957]

Hierden /Harderwijk/ Ameland

[@alexderpyracc4053]

@@stratigointernational662 analog on digital it isn't so easy to talk to people without setting them both up on both ends

[@stfuplsok]

alex derpy racc propregation???

[@tomgrafton954]

Hi, there was no bleep after you finished transmitting on the TLKR T80. Just wandering how you managed that. Hope you can help. Thanks

[@tdcattech]

Just done a video covering this one. kzbin.info/www/bejne/pYC3nnmQjKpkqpI (timecode 1:50 ish)

[@spig021]

Well well, it just goes to show that they are indeed capable of those advertised ranges when they are line of sight. Great test, really interesting. Would’ve been nice if you’d have also tested the XT660D in analogue mode too. I suppose the results would have been similar to the XT420.

[@tdcattech]

Yes. Pretty sure it would have performed the same. They certainly sound the same in analogue mode (I love the bold, brash sound of the XT420). The XT660d was only in the test to make sure that the digital would work the same. It still sounds terrible though :-(

[@MladenMijatov]

Funnily enough, digital has better range and should provide with better audio as it has error correction built-in.

[@genieur8188]

Hi, thanks for this interesting test. Very much appreciated. Just a quick question in an off-topic. What Software helps to get the yellow focus for the cursor? Thanks.

[@tdcattech]

I probably used Camtasia in this. 👍🏻

[@adambrammeld9286]

Never knew youd be so close (15 mins away) to me when i randomly came across this video! are you from the area? i want to see if anyone uses pmr446 for general chatter like cb haha

[@tdcattech]

No, I'm from Bristol (so not too far away). I think PMR446 does technically have a calling channel (CH8 if I'm not mistaken) and it is possible to raise people there but it's not used in the same way as CB CH19 or similar.

[@johansmitphotography]

0.5 watt can go thousands of miles line of sight. Amateurs talk to satellites over 600km away. As long as it is line of sight. Good job.

[@dajorivision4897]

Satelites dont exist as we have been told, they are high altitude baloons, no fotos of satelites only cgi, research flat earth. light houses are a give away, no curvature, take care.

[@pengiethebird]

@@dajorivision4897 So, what propels these high altitude balloons at thousands of kilometres per hour? How do they not burn up or just get destroyed? You need to do a little research yourself.

[@hywelw]

You should try from the Black Mountain View Point car park (western Brecon Beacons)- pretty amazing takeoff point into the Midlands using 2 metres on QRP for me on amateur radio and no reason why 446 should be different when conditions are right...

[@historydiggerpat8404]

0.5 watt. I would love to see the Baofeng UV-9R plus, 10 Watt do that. Just 40 quid on a Chinese website. Great test btw👍😊

[@africantwin173]

Hook up any chinese baofeng HT to a power swt meter, and you will see that the max output wattage is not true.

[@mikeav7083]

Are those radios using repeaters anthenas installed along the city ? * The noise background noise in the yellow Motorola ones might be due you have deactivated the noise filter, because it's usually disabled to capture weaker signals for a low-battery Tx radio or very hard environmental conditions that makes difficult the signal to travel freely over the air to the other end.

[@stephengunrunnerhanson3550]

A great video and a good distance and it's fun to do it I use baufengs and I like them we use them in the hills as there is no Mobile phone sig

[@stfuplsok]

*Baofeng / Baofengs

[@UnseenSpirit]

Wish you went back to the same clearer spot with the t80 :o

[@lee2e0wyk60]

I think we beat the 27km tonight Myles lol. Thanks for the contact. 👍

[@tdcattech]

118km if my guess on your location is correct. There is total line of sight between the two locations so, if you're able, I'm going to have to try it using the same limitations as this video. 2 x 0.5W handhelds with fixed antennas.

[@lee2e0wyk60]

@@tdcattech Im also not sure of your location last night?, happy to give it a go from a handy but its certainly pushing it without any lift conditions. 🤔

[@tdcattech]

When I spoke to you the second time last night, I was here - goo.gl/maps/H843odyancM2EK2D9 - I think you said you were in the Clent Hills which would make sense as it's a great run down to Bristol. Were you static mobile or home based?

[@lee2e0wyk60]

@@tdcattech we were indeed on the Clent hills which would be 75 miles ATCF. Clent hills 2 Hagley Wood Ln, Hagley, Stourbridge DY9 9JR goo.gl/maps/Q8UgmTo3uupMx7vd7

[@tdcattech]

If you’re up for a handheld test at some point, shoot me an email to [e-mail] so we can organise something. 👍🏻

[@fabiontg]

Any Hand Talkie will work perfectly with 0.5 watt if you are on the top of the mountain.. Try 27km in a urban zone with buildings... will not do the same performance...at all.

[@tdcattech]

Absolutely. I’ve done a few videos on that. My general guide is 100-300m in such circumstances. If one radio has a static spot in a building, that might extend to a 1km but, without a repeater, they’re pretty poor.

[@joecachia2]

Of course not. Nobody assumed otherwise.

[@gabrielueta6908]

Mineiro jumento, que não sabe disso.

[@mdhaierimiskan4762]

I love Motorola & Kenwood product.....👍🇲🇾

[@juststeve7665]

would help if both of you kept the antennas vertical. cross polarization weakens the signal.

[@SkKim-rv2gb]

Good test 0.5w could be over range than there. if the one station is high elevation than the other station For exam, using 50w mobile stations on ground that 200miles away neither copy, but flying airplanes on 2000feet either copy very very clear

[@wasptube1]

I recently purchased the XT180 part of a 2pack, it was £75 reduced from £150, the XT180 is the sister set to the T80, they're identical except the T80 is yellow with black strips and the XT180 is Black with yellow strips, it is good to know they are capable of 27km but its a shame its not great at 10km and less, in heavily built up areas and large warehouse environments they are only capable of 1km, i have been trying to find out if i can remove the antenna to replace it for a higher range antenna, but sadly i think the standard might be glued on to prevent tampering.

[@egillis214]

Shows noise is environmental. RF noise is also low during power outages. A blackout is great for testing SHTF comms.

[@lumerasahebat]

Point to point sama sama dataran tinggi,bebas halangan...jelas jangkauan bisa jauh...🏁

[@harisrozak]

Nice video, I think those range accomplished because the obstacles between radios are minimum. I wonder how far it will be if we test it on the forest or cityscapes

[@tdcattech]

In real, everyday use, the range of PMR446 is a few hundred meters. I've never tested in a forest though. Maybe 1km, terrain allowing? Just a guess.

[@tigdin68]

amazing! That's impossible! )))

[@salam2488]

I was keying our repeater by handheld radio 5 watts output power and the distance between the repeater and the radio was 42 km away. the repeater has an excellent antenna and 100 meter above the ground

[@sambathkumar0072]

Hi friend I'm. From India tamilnadu Nice to see

[@TomSP9TL]

You could have come back with the T80 to the place where you were before, while holding the camera, and then compare to XT420 :)

[@randfee]

yeah I'm really wondering about that too!

[@MrTruckdriver66]

hello guys, thanks for your video, i am about to buy some walkie talkies for our motorbiker friends for get connected while we are riding, this video help me a lot, but i`d like to ask also which video editor did you use for edit the video which is able this PiP swap function?

[@tdcattech]

I generally use Davinci Resolve for editing these days but I think this was done in Premiere Pro. Any video editor will allow this type of composition so you shouldn't have a problem.

[@ianhand5006]

I can access a 70cms repeater, about 30 miles away as the crow flies, from inside my house, with 200mW. I live 800' asl and have line of sight with it. Your only limitation, on UHF, is the Earth's curvature.

[@MaximusPanin]

I bought a T402 for the American market. Very similar to the T80.

[@tulenik71]

Hello, is there any possibility to control squelch function in XT660d? I read thoroughly the documentation but didn't find any information about it.

[@muhammadhazikrabbani2697]

U Make Me To Subscribe Your Channel Man This Video Is Awesome.

[@mikesey1]

That half a watt power may not actually be that if you aren't using a fully charged battery/ batteries.

[@tony35842]

Not too surprising. True LOS is invariably excellent. I can contact the ISS (about as LOS as you can get) using less than 5W on a handheld with rubber aerial.

[@awisstory]

Indonesia hadir.....