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.
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.
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.
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.
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.
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.
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 :-)
AGAIN: the first reasonable range test on UA-cam !!! 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
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.
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.
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.
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.
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.
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! :-)
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
Interesting tests, I did similar tests in the late 90's/early 2000's but unfortunately that was before UA-cam 😁 It's amazing how far you can get on these little radios.
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.
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
👍🏻 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)
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.
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
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. : )
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.
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.
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
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.
@@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.
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.
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
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.
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
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...
Not because of a clear path or a high ground because you have a high quality radio and the most important is you're place is using what we called REPEATER.... Its loud and clear sir... Your signal is good because of repeater .. frequency and channeling
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.
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.
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.
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
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.
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.
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?
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.
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
Retevis rt45 617 is an excellent radio and like the rt 24 it has a hex screw at the base of the antannae when removed antannae can be changed the rt 617 has a Mon key.
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. :-)
@@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
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...
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.
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.
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
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
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?
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.
Distances greater than 50-70Km can be made from two high-altitude positions. But if you try in the city only a few hundred meters. For me the best is Motorola.
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.
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.
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.
None of these. In a built up environment, you’ll manage 300m (see the first range test in this vid ua-cam.com/video/Jg2AbYHkMhw/v-deo.html ). For any more you’ll need 4W of power which needs a license. You’ll never manage more than 1-2km though.
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
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?
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
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!
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!
i wonder where you got the RT24 for £20 a pair?
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
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.
Loving the extra stats! 👍🏻 No idea the working for the first one.
Geek
They found that spot where radio makers test the range of their radios 😀
Haha
Exactly! This test is pointless.
@@mingzhu8093 no? 27 k in a 15$ radio is huge, makes you think how far we got and how we take things for granted
@Afg Tunes Quality wise pay more money, range there will be little or no difference
hahahaaha lol
The beauty of having totally clear line of sight between the two!
However, very long distance for 0,5 W and short antenna.
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.
I had a chat with a bloke 51 miles from my location in Somerset ( he was 20 miles north of Cardiff)
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.
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.
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.
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.
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.
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 :-)
AGAIN: the first reasonable range test on UA-cam !!! 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
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!
@@tdcattech Finally, there are problems with the curvature of the earth ...
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.
@@tdcattech looking forward to that mission.
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.
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.
Correct. Don’t worry about comparing range between PMR446 devices. They all perform the same.
Just rescued a pair of those yellow ones from the bin. Will give it a try.
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.
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.
Of course not. Nobody assumed otherwise.
Mineiro jumento, que não sabe disso.
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! :-)
sorry thay are all on towers no mountens
minimum height is 150 ft over that you need a light on top for air craft
how about just having a 150 ft tower and put the repeter on that just like the
police and fire service do everyday
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
The power doesnt even really enter into it its the clear line of sight
that radio has a 1/2 watt transmiter
in town 1 mile or line of site out of the box
Interesting tests, I did similar tests in the late 90's/early 2000's but unfortunately that was before UA-cam 😁 It's amazing how far you can get on these little radios.
Indeed. Before everything had to be captured on video. Early days for PMR446 too. It was a fresh new allocation then.
@@tdcattech First radios I bought were Goodman's Trackers, cost £100 for the pair. Still got them and they still work 😀
delboyonline
Wow then
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.
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
👍🏻 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)
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.
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.
Shows noise is environmental. RF noise is also low during power outages. A blackout is great for testing SHTF comms.
so the boxes arent lying ... great test guys
38 miles is done on are G M R S channels not family service
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
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. : )
That's how you do range testing!👍👍👍
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.
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.
Precisely, try explaining that to a flat earther tho !
😂😂😂
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
alex derpy racc Hi! That was on a digital channel or analog? 😊
Hierden /Harderwijk/ Ameland
@@stratigointernational662 analog on digital it isn't so easy to talk to people without setting them both up on both ends
alex derpy racc propregation???
Hello...Very Good Video Thank you very much👍
Световния рекорд на пиемерки е малко над 500 километра. Понякога при подходящи условия, при радиовръзките ,стават чудеса... Прекрасно видео. Благодаря
7:40 the sound quality will increase if you would hold both radios with antennas straight up
Epic test Brothers. Please more
Line of sight and location is the main thing in RF coverage optimization, Great job,
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.
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.
@@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.
Tess.. good job. Nice and like that redio.
Ahmad from Indonesia listening
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.
buy a zastone a19 or baofeng for half price of a pmr takie, stop with this shit
Good line of sight is why.
παρακαλοει να εχει και μια δοκιμη ποιο χαμηλα στο επιπεδο του σπιτιων ευχαριστη
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
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.
That half a watt power may not actually be that if you aren't using a fully charged battery/ batteries.
Any Walkie Talkie with a range of over 6 miles will have problems because of the curvature of the Earth based on level ground.
Yep. I always reckon about 10km assuming each person is stood up when using the walkie-talkie.
But with any height it improves quickly. However be realistic when estimating distance.
Curvature of the planet is actually 22miles over open water so on high ground this would be greatly expanded.
Earth is flat, dont worry about curvature
would help if both of you kept the antennas vertical. cross polarization weakens the signal.
Thanks for the test! :-)
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
White Noise sounds a bit racist
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...
Not because of a clear path or a high ground because you have a high quality radio and the most important is you're place is using what we called REPEATER.... Its loud and clear sir... Your signal is good because of repeater .. frequency and channeling
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.
here is a simple test draw two circles if thay don't over lap one your out of range
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.
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.
I probably used Camtasia in this. 👍🏻
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
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.
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👍😊
Hook up any chinese baofeng HT to a power swt meter, and you will see that the max output wattage is not true.
Superb testing very helpful video
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.
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?
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.
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
Retevis rt45 617 is an excellent radio and like the rt 24 it has a hex screw at the base of the antannae when removed antannae can be changed the rt 617 has a Mon key.
In Devon, we call that the Midlands.
มี option camera port hdmi v ? รุ่นใหม่กำลังจะมา มีกล้องเสริมระยะไกล฿?
Really enjoyed this! Nice one! If you're up in the north west again let me know I'll do a test with you
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. :-)
@@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
Hi, there was no bleep after you finished transmitting on the TLKR T80. Just wandering how you managed that.
Hope you can help. Thanks
Just done a video covering this one. ua-cam.com/video/oOTmFZWE1t0/v-deo.html (timecode 1:50 ish)
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...
Awesome video dude, quality is great :D
Thanks! Glad you enjoyed it.
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.
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.
How about the baofeng families, especially the UV5R, did you try that before???
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
Great test !!!
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
The makers all test these radios LINE OF SIGHT! thus the farther range than in the city or bush! also take into effect the weather conditions.
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 ??
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?
PMR446 model is price is 4 unit.
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?
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.
Distances greater than 50-70Km can be made from two high-altitude positions. But if you try in the city only a few hundred meters. For me the best is Motorola.
Yes, 100-200m in a built up area is the best you'll do with these little devices.
Clear sound!
Clear site of line I can do it with smoke signals !!.can you do it in Forest more than 300 h.yards?
Wish you went back to the same clearer spot with the t80 :o
Wow you found a great spot to do the test so close to the road...☹️
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.
*PMRs
Very nice video!
Right, well I've had a great copy between Glastonbury and Barry, in S. Wales.... 30 miles.
how much trouble is radios they look awesome
well yeah your 500 foot up
What about price?
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.
Good job 👏
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.
I have a couple of XT660D radios for sale if you're interested. :-)
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.
Cuál sería el mejor walkie talkie pmr ?!!
Hi TDCatTech, please tell me which is good for urban city walkie talkie? Can i use this 27km Range in urban?
Thank you for testing amazing video!
None of these. In a built up environment, you’ll manage 300m (see the first range test in this vid ua-cam.com/video/Jg2AbYHkMhw/v-deo.html ). For any more you’ll need 4W of power which needs a license. You’ll never manage more than 1-2km though.
I use the Wouxun KG-UV9D 5 watt PMR and also LPD on it, works perfect, but also amteurfrequenties and lots more.Great fun.
@Steve Terry I know, but it works perfect, anyway, i am always good to receive for other stations.
You could have come back with the T80 to the place where you were before, while holding the camera, and then compare to XT420 :)
yeah I'm really wondering about that too!
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
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?
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
@@tdcattech Thank you! That'll be equally useful.
Is it UHF? As i know UHF must be using the base station for that range...correct me if i wrong.thx.
Hi I got the yellow walkie-talkie and I didn't try them yet up the mountain but I try them soon
if the antennas can see eachother you can reach even the double of 27 km and if you use a Yagi you can do better
I’m guessing a Yagi is an antenna make?
@@Really2950 A type of antenna. Looks rather like a TV aerial. They can concentrate ( or beam)a signal in any desired direction.