Walkie Talkie 27km Range Test - PMR446 0.5 Watt

[@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?

[@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

[@Spscc23998]

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

[@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.

[@theultimateblindmaster8570]

Nice range testing guys, I would have to give it to the XT for 20 and the RT 24, as these were the best to with the clearer audio.

[@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)

[@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.

[@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.

[@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.

[@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)

[@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.

[@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 :-)

[@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

[@officiallynmotion7100]

Epic test Brothers. Please more

[@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.

[@donalderickson-si8ww]

over here in the US the F C C runs the show and are Family service radio run at 1/2 of a watt a mile maybe or line of site we cant use yours here as thay are not under F C C rules

[@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

[@saftflo1489]

I need your help. I'm looking for a walkie talkie that's cheap but can cover up to 20 kilometers. Can you recommend one to me?

[@osmanlitorunu9585]

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

[@XXXXXXXXXO]

Thanks for the test! :-)

[@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.

[@ahmads6674]

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

[@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

[@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.

[@СергейНеобязательно-з1у]

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

[@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.

[@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.

[@LZ1SSA]

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

[@jobesp183]

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

[@justme-n-gracie]

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

[@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.

[@udom64566]

มี option camera port hdmi v ? รุ่นใหม่กำลังจะมา มีกล้องเสริมระยะไกล฿?

[@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

[@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.

[@qsdrfghgujfddyffguff]

Superb testing very helpful video

[@mikesey1]

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

[@Priyodarsono]

How about the baofeng families, especially the UV5R, did you try that before???

[@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...

[@okhamradio]

Good job 👏

[@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.

[@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)

[@ukd8387]

Great test !!!

[@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. : )

[@cronaldoefe]

Very Good video thank youu ❤️

[@majorkonfuzion1007]

Now, how do i knock down all the hiills where im from, i need not 27, not 20 just 10 kiometers

[@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

[@russelpasamontehabla]

That's how you do range testing!👍👍👍

[@hh-vq3cz]

I want to purchase a pair of two way radios, would you guide me which model or brand has a good quality for long range and lower noise, better reception? Not expensive one.

[@kitkatkutv307]

I cant understand - my Motorola t80 extreme dosen't work on 3km distance. Me and my friend have the same room, and those 2 numbers on the Main page 1 1 and we cant jest eachother. Can someone help? Should we try changing rooms? Distance is 3,7km (2,299mile)

[@kitkatkutv307]

Also it's raining and I live near the forest, but he lives at the border of the town, so signal have to go trough the entire town i guess, but I still should hear him, right?

[@SAVVASASLA]

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

[@michael.meinhardt]

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.

[@Samurai161177]

Maybe for you interesting the " Team Mico Vox PMR "👍

[@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.

[@danielbeller972]

Very nice video!

[@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

[@TechNolicAl]

Hi, are you able to post a link to a google maps screenshot which shows the distance between Point A and Point B, from the destinations you've done, by any chance?

[@tdcattech]

I can give you the exact lat and long. This will show you exactly where we were. Location A (Steve) - 51.72452, -2.25029 Location B (Me) - 51.69078, -2.64028

[@TechNolicAl]

@@tdcattech Thank you! That'll be equally useful.

[@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. 👍🏻

[@simonsupersi2225]

Whats with the yellow bit on the bottom .the extreme has a light shame these dont

[@GenerationalWealth_GW]

Hi I bought one of the Motorola "XAP0085BDGAA" XT180 and I would like to know what is difference between XT180 and T80 or would it be better if I pay the extra for the T80 Extreme? I'm buying these Radios to connect to some older model Motorola at work so I can have my own Radio and better signal, this is just to give you a idea of what I'm using them for.

[@josephmullen3254]

Hi do you use scan to pick up channels yes

[@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.

[@Samurai161177]

Pmr Test in Portugal is amazing. See it on KZbin

[@waseemabbas6703]

Can anyone explain, why the Voice over DMR Portable Radios is very robotic & Nasal? It doesn't sound clear, and it's very difficult to recognize who's calling. Sometimes, it's very annoying because you don't recognize the calling person. Any expert option?

[@tdcattech]

Bandwidth on the audio codec. Imagine an MP3 music file at about 4-8kbps rather than upwards of 128kbps as is normal. It would sound like a garbled mess. Same thing with DMR and dPMR (as used here). You just can’t squeeze enough data down the channel to make it much better.

[@waseemabbas6703]

TDCatTech as per your experience which model / brand of DMR radios have the best audio quality?

[@Goyotero1000]

@@waseemabbas6703 dPMR NXDN Kenwoods set to 9600 the best..DMR is only 4800.

[@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

[@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]

😂😂😂

[@Shahidulislam-me5rx]

Brother per set is price usd dollars pls?

[@lumerasahebat]

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

[@spokojnyMamut]

There is one major difference. Antena length. Motorola 80 Has shortest one, so efficiency is lower. Best pmr I ever had, was midland g9 with 1/4 vave aerial. About 25-30 percent konger range than t60.

[@jackcarver8234]

buy a zastone a19 or baofeng for half price of a pmr takie, stop with this shit

[@JPDW3072]

So are those PMR's any good like CB-Radios or better ? Thank u.

[@tdcattech]

Not the same as CB. CB had a standard 4W output on 27MHz which gave some decent coverage but required stupidly long antennas. It was much more base station stuff really. You'd never be able to get a CB handheld in the lightweight form factor that you can with PMR446. This is for business use really. Around a building, construction site, leisure centre, school, that kind of thing.

[@JPDW3072]

@@tdcattech So if you would connect a PMR to a decent antenna , even with a max of 0,5 watt i could get the same (or close) result as a CB ?.. Because i dislike those stupid long antennas too.

[@marty68wt248]

@@JPDW3072 know people who have pmr446 that uses diamond sg7900 with great results. Antenna is for 2 / 70 but swr is flat on 446 . Its illegal to use this on 446 mhz but so is power been transmitted by most (not all ) on pmr446 radio nets . PS personally love using pmr446 from high ground, 73s.

[@TheChosen2030]

rt24, is its range really 27km? Because on amazon site description it say it can only go 3km.

[@rogerwoodland2587]

there talking about use in a built-up area.

[@TheChosen2030]

@@rogerwoodland2587 on the amazon description it says in a build up area 2km. In a open field 3km

[@tulenik71]

realistically, several hundred meters there is no such thing like guaranted range carefully choosing hill and conditions it is possible to make several hundred kilometers call, but at the same time being unable to call my gf maybe 1000 m from me but inside the building UHF is very sensitive to any obstacles, althouhg sometimes random reflections can do miracles even between buildings

[@mervynsands3501]

At 0.5 watts on a UHF walkie talkie, low power (QRP), in urban or close proximity to obstructions range is meagre, sometimes less than 2km, open space double if lucky. If high up LOS every 10 metres extra gives a further range increase, so if say you're 200m above surrounding terrain and weather/background propargation is favourable, several tens of kilometres are workable.(sometimes) UHF is by its nature fairly short range and not to be relied upon much beyond your visual horizon.

[@rileycook7686]

What walkie talkies would you recommend for a 10 mile range because i would like for me and my friend to be able to talk to each other from our houses. But without them being too expensive

[@abiputra85]

Is it UHF? As i know UHF must be using the base station for that range...correct me if i wrong.thx.

[@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.

[@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 ??

[@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.

[@ahmadsayem]

Appreciate your efforts.. thanks

[@marinmarin7187]

Retevis RT24 is the best on test?

[@tdcattech]

No. They all perform the same range wise. The RT24 always sounds pretty good though.

[@hidenfn]

Awesome video dude, quality is great :D

[@tdcattech]

Thanks! Glad you enjoyed it.

[@easternnagagospelvlog2951]

What about price?

[@Kokopellli]

7:40 the sound quality will increase if you would hold both radios with antennas straight up

[@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.

[@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

[@egillis214]

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

[@emilferent23]

Thanks for this test!

[@tdcattech]

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

[@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???

[@Hockeyfan9884]

Ok. so if you both were at sea level but on a raised platform 200 feet high with no obstruction , can the line of sight transmission go up to 300 miles ?? Is it similar to a single side band radio ?

[@tdcattech]

No. As far as I know, curvature of the earth would prevent anything past about 80-100 miles at that altitude. You can get very long distance performance but this is caused by atmospherics and is not something that could be reproduced readily.

[@paganphil100]

Steve Davis: Line-of-sight for two stations each 200 feet high would be approx. 62 - 63 miles (but could be much more in certain atmospheric conditions). Formula is square-root of height multiplied by 2.22 for each station (31.39 miles) then add them together (62.78 miles).

[@vinsmith1731]

would like to see this test done in a built up area, line of site is fine but how well will it do in towns?

[@tdcattech]

This video is an urban range test I did using most of the same radios. kzbin.info/www/bejne/qmSvi2h5q9GEfa8

[@AndroidFerret]

Hi... Has someone any idea how far i can connect in a big city... Due to the buildings i guess there would be much less connectivity... But how much less? Is 15km realistic?

[@tdcattech]

Unless you're using a higher powered repeater, you'll be limited to a few hundred metres in the city. The joys of radio communication. :-)

[@AndroidFerret]

@@tdcattech thanks ...that's what I wanted to know ... I have a stationary one ... maybe thats better? I have to learn many things about cb ...

[@cpbbg5bcbbg580]

Looks like you were doing the same type of experiments testing out FR-S frequencies basically PMR different frequencies instead of 4:40 it's it's 467 MHz yes you can do more than 27 km when it concerns PMR made a test at UBC University of British Columbia from UBC Ombudsman which is 300 feet above ocean a mountain 52 km away calculating of Kursi angle of attack managed to make the contact however the person was carrying his transceiver as well on FR-S basically same power the person I was at 1.5 K above the ocean so basically line-of-sight was almost visible no problem with the curvature of the earth as we lose 6 ft each 5 miles 3 MI the only issue is for it to work how to put the monitor button on off basically listen to the static the squalus was off monitor was on and we managed to get a contact going through the signal look like and sounded like it was a 5 out of 10 they probably would have work with the monitor on however did not want to take a chance this was definitely an interesting testing scenario also with the type of antenna you have the type of transceiver in antenna you're using may also make a big difference point is line of sight altitude are your friends however sometimes and some special circumstances you connect the waves bounce off Hell's or buildings this would work better in VHF definitely managed to transmit the small contact even though they was a hill infront literally in front so there was no way of transmitting a signal without the signal reaching back bouncing true buildings it came in very weak the point is you can do more than 27 km for sure sometimes by modifying the antenna you may also do so however as they say it's not supposed to be done for licensing issue blah blah blah however I've also heard of people Hammer you guys using specific antennas doing a distance of about 300 km however 4D small radios they have a potential of still kicking ass let's think about it this things were designed for like maybe two maybe three miles the fact is we can beat those by calibrating the equipment and having the right pitch angle inputting all variables together height line-of-sight also being outside the city well help RFI to be on the lower noise yes we can on PMR FRS gmrs we can achieve longer distance by pushing the boundaries sometimes we end up having different results thank you for the video

[@mikepeirson1150]

Good line of sight is why.

[@DroneLifeLelystad]

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.

[@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...

[@middleeastern6497]

No doubt that Motorola radios are still the best. I'd like to ask you, would those radios cover an area like countrysides like between farms? Also do you need a licence to own those radios?

[@MartinProavis]

Clear sound!

[@sphere821]

Which one do you recommend xt420 or xt460?

[@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.

[@silverlg21]

What's pmr? Is that the same as gmrs/frs in the US

[@tdcattech]

PMR is more of a generic term but PMR446 is the license-free frequency allocation for the EU and UK which, as you say, is equivalent to FRS in the US.

[@CianTheWutDK]

Im so confused! - When i read about the XT420, it says ''max distance 10km''.. How come the 27km range? :O

[@tdcattech]

This is radio. There are no exact numbers. The XT420 will manage a few hundred metres in a built up area but much more with clear line of sight between the two radios.

[@UnseenSpirit]

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