Set up a Baofeng UV-5R repeater
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- เผยแพร่เมื่อ 12 ก.ย. 2024
- www.ebay.com/it...
This is much cheaper to set up a Baofeng repeater using 2 handhelds and this interface. I saw other interfaces on ebay for $80 or more, this will do the same thing at a fraction of the cost. Watch the video for more information.
I was cussing mine until I went back to Amazon and read the note that the volume on the Baofengs should be turned up all the way. Worked like a charm after that.
Is that on both radios?
@@salopsniper22 yes.
To answer another question of "what advantage does this have over just using two radios?" The answer is that if the repeater is located at a central point and one handheld is 4 miles to the east of the repeater while the other handheld is 4 miles to the west of the repeater The first handheld can transmit to the repeater while the repeater transmits to the send handheld. This would not work with using just two handheld radios that were 8 miles apart.
By the way, I made one of these repeater interfaces from two cables from junk headsets and added two resistors to cut down audio level from the receiver to the transmitter. You have to decrease the audio level by at least a 10 to 1 ratio. I did this with a resistor divider network consisting of a 100k resistor and a 10k resistor. (I wish I could put a diagram in here). Wire the two resistors in series .... feed the audio output from the receiver into the 100k resistor .... connect the loose end of the 10k resistor to ground of the receiver... connect the grand of the transmitter to the ground of the receiver .... connect the mic input to the junction of the two resistors (where the two resistors are connected to each other).
Why
Just turn the volume down, 🤣🤣🤣🤣🤣🤣🤣
Ooooh, thanks for the tip. I've tried this with cables directly and it's awful, so using resistors will clean up the signal and keep it from clipping!
i have cool idea maybe somebody do with it a phantom 3 drone that give you 300ft repeater for 23mins put radios in small bag fly them up in the air.
300 ft!? LAME! Try 1600
Big balloon like they use at car dealerships. Thated be it.
I was literally thinking this but with an RC plane that could loiter for hrs.
With a solar charger
The phantom 3 is so good
Great video. I love the idea of the repeater providing the roger beep.
I purchased one of these and the tx and rx are inverse of the way they are supposed to be. The thing never transmits until you let go of the PTT... Then you just get the Rgr tone.... I'm glad you found one that worked!!!
I've had the same problem it seems these only work when your within a few feet of the receiving radio
I know this is an old comment, but your reciever is being overloaded by your transmitter.
In the end i end up spending 90 dollars for the conector 2 raidos and long range antenna thanks so much for the video now i have a repeater for where ever i go
This won't work, the minute you get a 100 yards from the repeater the the transmission radio signal is diluted by the the receive. This is due to the repeater using two seperate antennas. When a repeater uses seperate antennas for TX/RX they need to be around 30ft apart and the interface cable on these prevents that.
The solution is to add a duplexer and move to a single antenna that is tuned to a specific frequency, or to get them spread far enough apart (duplexer).
or put a good filter on the antennas
RETiredGM, I can get out an easy 30 mile radius with 250 millawatts on 2 meters. I am sure many repeaters have amps hooked up to them. And many do not. You don't need much power when you are up 400 feet. They are just demonstrating the ability to setup a simple repeater. But with external antennas, and some height, you have something that is cheap, simple, and it works well in a small radius. The idea isn't to use the rubber ducky antennas. And your right, it wouldn't produce any better results than just using the HT. The idea is to use external antennas, or put the setup on a hill or other strategic location. Think about that, what if you built a box to put the whole setup in, to protect it from the weather. And then you hoisted up to the top of a 60 ft tree. Even the rubber ducky antennas would provide an advantage due to their height.
+Bill Oldham Even a copper J-pole and maybe a small 2m amp. I'm thinking about picking up another Baofeng just to experiment with this idea. Might need to buy another sma to so-259. Looks like a fun project. 73
+Bryan Solo dont drop it, its junk
Simple video, however you forgot the part about desensing. You see, even a small simple repeater like this needs a duplexer or at least, a notch filter to notch the TX Fr from the RX Fr. Without the duplexer (properly tuned) your transmitter will overload (desense) the receiver. After you get more than a few feet from the system, all you will hear is static, or at best the radios will begin to cycle, as the receiver is cut off by the transmitter, then keys again. The basic concept however, works... you just need to add the filters and cables and you're off to the races.
I agree with the cycling part.
Or just have the antennas separated
So, with a duplexer I can run my TX radio through an amplifier, to the duplexer, to the antenna.
I can run the RX radio to the duplexer to the same antenna.
Do I need to be aware of any other technical issues?
I can’t run this on HAM frequencies, but could I use this as an FRS / GMRS repeater?
@@memowilliam9889 sounds like you got it. There's videos on here with a guy doing exactly that. He used a retevis repeater, but swapped the duplexer to a 50w.
The sound is awesome, Command and conquer generals zero hour, nostalgic
How well does the "repeater" function? Are there delays detectable? Is the system responsive and fast-switching? Is the transmitter VOX or carrier operated? Thanks!
To answer the question of "why can't I just use a straight cable from one radio to the other?" the answer is that the earphone jack outputs about 350 millivolts .... while a microphone outputs about 15 millivolts. So with a straight cable you would be ramming 350 millivolts into an input that expects 15 millivolts and severely overdriving the mic input on the transmitter.
So being a nube, I saw a guy who used a strait cord with an adapter (2.5 to 3.5). Your saying that he is going to fry his radio?
@@LM-uz4pr yes, in time.
@@LM-uz4pr That is very likely. Or the retransmitted audio will be severely distorted to the point of being useless.
Darn, too bad you cant just TURN THE VOLUME DOWN! Oh well, shucks
@@democratpro these guys are wrong. It works with vox setup on your baofeng. And the volume can be turned down. These Jack's are analog. Less volume = less volts
Cool video, thanks.This guy set up a UV-5R repeater station using 2 HTs WITHOUT using a controller box:
Set up a Baofeng UV-5R Repeater System
Looks like He did
All these radios are capable of multiband operation so why not set the system up for crossband repeat? That avoids de-sense and the need for antenna separation and/or duplexers.
I have bought that kind of interface please help how I will do it..is there any settings?? It doesn't work for me..
i bought that interface, but it only works for me when i set it up backwards.
meaning: the little black box that is labeled "receive/emission" i have to have my "emission" cable plug go to my "receive radio" and my "receive cable end" go to my "emission radio".
if i plug stuff in back wards it works, if i follow the sticker arrows the transmits radio doesn't begin transmitting until the recieve radio is done receiving, which at that point there is no audio to pass along so it transmits nothing.
i played with this about a year ago, but tonight i am only now discovering that it only works backwards for me. i watched your video again, thinking maybe someone put the sticker on upside down which would invert the cables, but using the oval shaped indention on the top of the black box as a reference shows my sticker matches your process for some reason.
can you offer any advice?
Awesome! I’ve purchased one for GMRS, volume up, programmed correctly. Radio received while unconnected, but when I plug in K1, audio is VERY quiet, and Roger beep comes in full volume. Any idea why audio is quiet but ruger beep comes on correct volume???
You explained radio a frequencies but not radio b. Are they the same? What are the other settings. Mine just goes to permanent send.
the FRS radio transmit with only 1 watt so you can use the beofeng and just turn down the power. The freq are found really easy online I have 2 FRS radios and a Wouxun HT and I have been able to use my wouxun HT to communicate to the FRS that my wife or both that family members have. I didn't see anything online that said you couldn't use a HAM radio on FRS as long as you lowered your power setting.
+Shawn Rigoulot technically you cannot transmit at more than 500 milliwatts which means you're still breaking the law. but in all honesty who gives a shit, and you WILL NOT be caught because nobody actually cares. As long as you are not abusing the frequencies, using bad words, playing music etc. You will be fine. You should monitor your signal just to make sure you're not causing splatter onto other channels of the FRS though - high power settings can create issues for FRS type radios if the channels are closely spaced, you get bad static every time someone on a nearby channel talks with their high power radio.
+Shawn Rigoulot note it is not legal to use them for gmrs or frrs, detachable ant and power, not part 97 compliant, quit hidding the truth
if you can't transmit at any higher then 500 milliwatts.. then why do the ones they sell for both frs and gmrs say 1 watt or 2 watts or 3 watts??? Just curious why is it on the packaging by most companies including motorola.. maybe the FCC should send them a nice little note..
+Shawn Rigoulot to make things simple goto fcc.gov website part97 the info is all there, we wouldn't be having this conversation if you paid more than $25 for the cheap Chinese radio
+bryon clemons
yeah, because someone who responds to a video must have the same equip that the video is about.
First off myself and prob tons of Hams would love to know where to get our hands on a good $25 ham radio. My two radios were more then $25 and they great.
I do not now or have I ever owned a baofeng, but people love them.
I prefer to own American products but there are no real American made Ham radios. The so called American made radios of Icom and Motorola are not made here. Icom has Asian boards and more most of the time and even Motorola when you pop the battery out of the HT or look at the back they all say made in Malaysia. So, Ill take the made in China or Japan over Malaysia any day.
I am aware of the issues in part 97 but if a natural disaster or worse happens it's good to know how to do this kind of stuff. It's the people who don't take the time to learn new skills that will be in trouble if something major were to happen.
got a ? so if i set this up with a outdoor antenna up around 30/40 ft how far u think i can talk looking to talk around 40 miles
And Ken Page, your probably right! But if you were trying to do a cross band setup, it would probably would not be an issue. I don't cross band much, but I'd rather burn up a $30 Baofeng than a $400 Kenwood due to the 100% duty cycle. And if you had the real estate to separate the antennas far enough apart, it's a cheap setup.
Several comments talk about using an external antenna for the Baofeng UV-5R. I have several of these radios--if I use them with the stock antenna, or with a small whip antenna, they work fine. In fact, their reception is much better than I would expect with such a small antenna. However, when I have tried them with several different external antennas (a couple of j-poles and a couple of mobile antennas)--I am able to transmit well with these antennas, but the better antennae seem to overload the front end of the Baofeng, and I get zero reception. I would love to set up a repeater system like the one described here, but would like to do it with a couple of good external antennas and some elevation. For those that have done it, how did you solve the desensitization (overload the front end) problem?
The UV-5R and UV-5RTP stock antennas are atrocious!
They are basically a random wire stuffed down a black straw and not even tuned properly. My last ones had almost 2cm of variation over 5 identical models. I originally fitted some very cheap Chinese (counterfeit) Nagoya NA-771's and the difference was incredible. There are also some ultra cheap SRH850S (also counterfeit) helicals which seem to put out almost twice the field strength as the stock antenna, despite being a third of the size - and the performance of those almost rival the far lengthier Nagoya NA-771
I always say that if you really want the best out of a baofeng - dump the stock antenna in the bin on day 1 : ) It's a terrible radiator. The little $2 stubby SRH805S clone is now my go-to antenna for baofeng HT's
I've never seen any real front-end overloading issues with any of the baofengs I've owned - and I've tested them on my main 5 element/8 element dual-band Co-linear with 15/19db gain ... they still work well and don't even noticeably saturate when the transmitter is literally a couple of metres away putting out 25w
In fact, there are endless youtube videos with people quite happily keying them up just centimetres apart. If anything, I'd say there's far too much headroom in the pre for their just-about-adequate sensitivity.
Can a in car repeater with antenna, be set up for use with 8w baofung 2 way radios
Hi guys. I need some help. I have done the setup on the UHF frequency. The problem I have is that I can send perfectly over a long distance, but the person responding the channel opens but nothing comes through. What could that be?
They can say all the want about power, its always based on PEP peak envelope power, thats what the input is, the out put is at the legal amount, CB radios were always listed at 5 watts, but that was pep the out put was usually between 3-4 watts out
Thanks for the video! I plan to get a few of these boxes and a few baofengs. One mobile system in my truck, one I can carry with me in a backpack (to be the envy of everyone at ham fest) and one to put on a pole with a control box in a yard, which I don't know about mine or my friends
Are you one of the 22 people at hamburgerfest who are not too fat to walk, or do you ride a scooter and weigh 1700 lbs, too?
@@democratpro I weigh less than 150 lb buddy
@@seanjuth not bad for being 4'8". Comrade lives matter✊🏿💉💉
What is the name, model # or description of the repeater interface you used? Thanks
This is a really cleaver idea, but it has one drawback: Repeaters are legally required to identify themselves every 10 minutes. This setup does not permit that. Being temporary you will probably be able to get away with that, but it's something you should know. For an emergency or very remote application it would probably be OK.
shut up
I would like to know how he got it to work on 146 MHz? The box works flawlessly on 70cm, nothing but headaches and hangs and loops on 2m. The relay box states 400-470 MHz.
I have all the pieces and parts to build a GMRS Repeater. How do I program the 2 different radios? I am totally new to GMRS and hopefully soon will also take the ham test.
Any help would be appreciated.
I use Baofeng & Chirp software to program my radios.For the"two repeater radios" all I need to do is: Type in 145.800 on the receive (RX) line for radio one & on the second radio type in 146.400 on the receive line for the transmit radio. Is this correct? My radio & my buddy's radio will have both the receive freq. 146.400 & transmit freq. 145.800 on each radio. Could I add a PL tone to this set up and if so I guess I would have to place it on the two repeater radios as well. Last question; would this work just using a simplex freq like:467.68750 on both the receiving & transmit freqs or does it have to use a duplex freq?
Couldn't you put a 40 watt amp on the tx to a outdoor antenna and make a long range repeater?
With that interface you don`t need to have VOX on the transmitter radio or it has to be on?
You have to configure VOX properly.
Also add tones (CTCSS/DCS) for smoothing out noise interference.
Would this work on the Baofeng's GMRS channels as well (obviously only for emergency situations)?
@Jacob Trent what do you mean, make sure vox is configured properly?
@Jacob Trent Oh, okay. Thank you!
Wondering if you still use the repeater box, if so how is it holding up? Great video!
I like this idea. How would I intigrate a nano node into the repeater system? Radio A (input) talks to repeater, output talks to Nano Node (low power simplex) to transmit to IRLP. Then Nano Node talks back to Radio C (low power simplex) which connects to Radio D (repeater output) Is this logic right? It would take 4 radios plus the simplex radio inside the nano node? Or is there a better way to do this?
I want to see somebody use a couple of the 8-watt radios on high power using mobile antennas and do a range test
Reading on a repeater site, do these really work ok, since they do not output more than 5 watts? Does the transmitting radio interfere with the receiving radio, since they are in such close proximity to each other? Most repeaters use 1 antenna and a rf filter to filter out cross talk.
Is VOX necessary or is the TX smart enough to PTT?
But how can this work without a duplexer? Radios side-by-side are going to deafen one another. If using VHF aren't you better off buying a cheap 5MHz Chinese mobile duplexer and using a VHF antenna or use a discone? Also, what about cross-banding where RX on side A is VHF; TX is UHF. RX on side B is UHF and TX is VHF. Can this be done? Placing this at a high point makes a a simplex VHF repeater.
Hi Eric, Can you share how you configure, bec my set up with same box is not working properly and both are transmitting continuously. it will damage the tripple 1 units. Please.... Please.... Help me.
Hi sir Eric my order for repeater systen just arrived . Have test it and it works like what you show on video. Thanks :)
How do u make it work Ive been trying for months . my antennas are 30' apart horizontally and 10' vertically . all I get is an almost but not quiet
Can this go both ways? For instance, I am trying to connect a network radio system to a transceiver. but the Walkie Talkie Repeater Box would need to work in both directions to pass the network radio to the transceiver and the transceiver back to the the network radio.
Curious what duplexer would be appropriate?
So I have a random couple question. 1) will the box transmit a repeater ID?
2) is this only for VHF and UHF? Like if I connect one of these to a 900mhz radio would it work the same?
1) No, ID must be done by the sender (there is no separate ID for the repeater)
2) You can use UHF on both, or VHF on both, or either on one and something else on the other.
3) Whatever comes into 1 radio will be transmitted out the other radio.
For example: if you had your receive radio on a Ham radio frequency and
your transmit on a GMRS frequency, then when you transmit on your Ham
radio, the GMRS radio was receive your signal.
However, this configuration would be illegal. I just used it to give you an
example to better understand the operation and the differences.
What is that cable that is interfacing between the two radios in the repeater? I think you are calling it an, "interface." What does it do? Is it necessary? I've seen similar videos that just use a mini headphone cable going between the two HTs. What does your baofeng "interface" cable do differently?
Do I need to set the radio volume on A or B? That repeater intermediate does not need volume?
Thanx. This was helpful. I can now set up an emergency repeater in my neighborhood.
I did a test with a EM1000R talkabout with a bs888 Baofeng one of 16 channels and has no display.
I used that cable p1 to p2. I made the connection P2 in Baofeng mic with active Invox. Called P1 in talkabout. I set the radio in 3 462 725 repeater on channel 22 for receiving and talkabout 462 625 20 channel talkabout in the Baofeng. I did my test and did not work the connection by cables. This test only works with two Baofeng? Does not work with the talkabout to receive the signal and to transmit the Baofeng?
Set up a Baofeng UV-5R Repeater System
Witch antenna needs to be the highest when u don't have the douplxer . The Rx or Tx antenna
I have been wanting to set up a mobile field repeater for camping site. I have a 8ft painter pole that extends to 50ft. I want to put 2 antennas on the tower/pole for this. With the 2 antennas so close, what kind of filtration should I need on each to prevent crosstalk?
Both radios will be on UHF, not on VHF.
Hey just out of curiosity before I invest in one of these, is this one of the ones that actually uses the PTT button or does it require VOX? Thanks. :)
It works either way. You choose what mode you want to use. For a repeater setup VOX is easiest
What kind of distance can you get using a setup like this?
Doesn't work here..., tried it with different Baofengs; UV5R's and UV82-s, but nothing.
The problem is that the TX unit keeps transmitting, i changed all FOX possibilitys, but nothing, keeps transmitting.
Changed the offset from + to - , from 0,6 Mhz to 10 Mhz; nothing...
And an other problem; both the RX as the TX unit's display's are on line "A" both when you connect the cable they both changed to line "B" and there is no way to go back to line "A" (dual watch is off)
So i gave the lines A&B the same frequencie but that also don't work, the TX unit keeps tramsmitting no matter what...
Any suggestions?
In this set-up what will be max range
The tx unit is turned on by voice activation ? Or is the ptt being closed by the cable ?
The reason I ask is because voice activation has a noticeable lag.
To have the rx unit ptt the tx unit directly would be far better.
Unfortunately there is no 'carrier detect' signal available from the receiver. Therefore, you either have to use voice activation or take the receiver apart so you can 'find' the carrier detect signal so you can connect it to the PTT input on the transmitter.
I do see problems with a baofeng repeater.
1. They run on battery's and will eventually die.
2. If they were run while in the charging base the radio would overheat.
3. Baofengs will cut off after 600 seconds of use
These could be fixed but I just wanted to get that out
Please tell me, which brand and model of the antenna on the right device?
Can you add a uhf repeater duplexer to this setup. Also will this work on the Baofeng BF-888s radios.
But there is ONE problem that NONE of these videos address. Receiver desensitization. I set one of these up and while the transmitting handheld (that is NOT part of the repeater) is sitting two feet away from the repeater it works perfectly. But in my test, when the transmitting handheld reached about 50 feet away the repeater's receiver could still receive the carrier but the repeater's receiver was being so desensitized by the repeater transmitter being so close to it that the handheld transmitter could no longer be received. In other words, when you got 50 feet or more away from the repeater it became useless because its own transmitter was interfering with its own receiver. I tried moving the receiver and transmitter 5 feet apart .... no help. So a MUCH wider separation will be needed between the repeater transmitter and receiver to make it practical.
At least 20 feet is needed on UHF and 60' on VHF.
What antenna are you using on the TX unit with the extended battery? and is it covered for 136-174/400-520mhz?
Hi, I’m trying to set up this type repeater using the same cable in the vhf frequency band and every time I connect the two radios rx 158.745 and tx 155.085 the tx radio constantly keys up while they are in the charger how can I mitigate this issue? Thanks
Have this same problem, did you ever fix it?
wouldn't a 2.5mm to 3.5mm cable do the same thing? hook up the transmit input to the receive output and use VOX on the transmit radio?
+SheepdogSupply Yes, there are other videos showing how it can be done. It's no where near as simple, elegant and reliable though.
Question. Can GMRS fixed channels be repeated in any way? I get the Ham radios part, I have both. But the GMRS transmit and receive on the same frequency, they don’t have offset options.
Actually, the GMRS frequencies do have an offset. The transmission out of a gmrs radio on a repeater channel is 467.xxx and the receive is 462.xxx.
okay I get setting up the first two radios what do you set radio B on ...the exact same frequency and offset? because I am thinking if you do that both radios will receive. I guess my question is what would you program into radio B to have it transmit out of the repeater?
They do have to be different frequencies, or else the transmitting side would hold open the receiving sides squelch and you'd just get a big feedback loop that would never stop transmitting till you turn off the radios.
Here's a scenario ...
Output Radio - set to 145.650Mhz
Input Radio - set to 145.050Mhz
So, all your users are listening to the repeaters output on 145.650Mhz, and they need to go DOWN by 600khz whenever they transmit, because that's where the repeaters input frequency is.
We call this 'the repeaters offset' ... In this case, the offset is -600khz
An offset can be - or + ... depending on whether the repeaters input frequency is lower or higher than it's output frequency. In this case it's minus 600khz.
So an offset of -600khz just means (The repeaters Tx frequency - 600khz = the repeaters Rx frequency)
Great!
So... now your repeater is happily listening on one frequency and (re)transmitting on another. We also know that our repeaters output is 145.650Mhz and we know that its offset is -600khz
Now we have to go program the users radios to do the same thing, but in reverse.
So, on the users radio:
set the receive frequency to : 145.6500Mhz, so it listens to the repeaters output.
set the repeater offset to : -600khz, so whenever you transmit it goes down 600khz to the repeaters input frequency.
Now the users radio will listen on 145.650 - but will transmit on 145.050
Because this is the opposite way around to the repeater, the system works.
Hope that helps
You do not address the settings between the two radios that have the interface. So any settings will work with all frequencys, no matter the output radio settings?
How do i decide what frequencies to run the repeater on?
Hey Eric...I got into radio due to the fact im partially disabled- I
Passed my tech and general last September but I am still a total noob....
I have a uv5r in my truck as a mobile rig running through a btech vhf amp with a tram mag mount antenna. It works very well and i often hit repeaters over 60 miles away. ( im in very rural Mississippi) When i do go fishing or a woods walk, i bring along a uv5r mostly for NOAA weather,but also in case of emergency and my cell has no signal.... here is my question- Is there a way to use the radio in my truck to re-transmit a tx from my handheld using all of its power and antenna?? I have the genuine Nagoya on the ht but i cannot hit any repeater near me barefoot.... Thanks for your time and for all you do to help us noobs out. 73 de KI5GEV
Randy in the North Mississippi woods.
do you have a link for antenna on your amplifier? thinking of setting up this same thing.
obviously we need a 3rd UV5r for the walkabout radio, then the other 2 would be at the truck to rX/repeat out from the Amp side
cant you just use a 3.5mm to 2.5mm audio jack from speaker and then run 3.5mm aux to the mic port on the other radio and set the offset? then set roger tones on the transmit radio? once you do that with the cable if the radios are on the transmitter will just start transmitting on its own, they need to be off while ur plugging everything in.
That is the exact problem that I am having. How did you fix this?
I am having same problem!! did you get the issue solved??
I used the 3.5mm to 2.5mm male jack.the problem was my tx radio was draining fast and it overheated the tx radio.the worst was when i walk 15 meters away the repeater didn't repeat my voice.it only light up that is indicate that their is someone pressing the ptt.how can you fix this problem?plz give me an idea..
Do both Baofeng's have to be the same model number? Thank you. Ernest Bazzinotti KC1LKB
What do you think?
where a buy the big antena you have in baofeng???
Ok, very sorry I know nothing about radios but trying to learn. I have 3 Kenwood tk-3360 radios and need to extend my range. would this work for them and if you wouldn't mind telling me how? What I am looking to do is Leave one at home and put the other 2 in both my cars, but right now it only has a range of about 100 yards. I need at least 2 miles. Can you please help me. Thank you.
***** This setup would not work for you. The tk-3360 radios that you have are not repeater ready meaning that you can only transmit from radio to radio directly (aka simplex) for all intents and purposes. Also, you would need 2 radios at home and then one in each car for this setup. If you do not wish to buy new radios, being that you have a removable antenna, I would invest in a external omnidirectional antenna for your home. This will only improve communications between your home and each car respectively. It will not improve communications between the cars. Adding a fairly inexpensive magnet mount antenna to both cars, and you will improve communications all around. Talking on a rubber duck antenna inside a car will ensure that your calling party will not hear you.
Would this system work on the btech gmrs v1?
is this a out side VOX control. and can it be made to work with other mobile radios
Hi, can I ask you what antenna do you use for the TX radio, the longer one? Thanks.
You never showed how radio B is setup. I assume the freqs are reversed. In practice, how far apart do the antennas need to be if on the same band?
Is there not supposed to be a duplexer installed?
Very helpful review.
Would this box eliminate the problem of 'receiver desensitization'?
Bruce Wayne Try crossband. Much more better even if theres no duplexer. Just have vertical separations.
i would like some info on this on UHF/VHF crossband repeater, what do i have to do in the interface ? i have the bff-9 radios too
How or what frequency you program the transmitter radio?
how about antenna separation ? especially if you used external gain antennas
Wondering if there are adaptors that would connect from ht to the internet so the ht's would not need to be in the same physical location. Not sure if this is even permissable
zello,allstar , dmr, etc all do exactly this but in most cases a cheap radio is modified with a few resistors and soldered to a cheap sound fob to solve ptt type problems.
is there a external power supply to attache to prolong the battery of both rx and tx radio?
I know the extended batteries have ports for AC/DC adapters.
What antennas are these ?
Can you not just hook them up with cables to do this? What's in the box?
I guess there's something about squelch and triggering.
You *can* just hook them up with cables. I've done it. It works. The transmitting unit would be set to VOX in this case. Unfortunately, the Baofeng VOX doesn't work all that great. The add-on controller box is more reliable to actually key up the transmitter when the receiver picks up a signal. Squelch? No. Triggering? Yes.
+Hangfire
No idea what's in the box, but I'd assume it simply triggers on audio voltage and closes the PTT on the second radio. I'd also expect there's some simple level protection rather than a direct link between speaker and mic too... because setting the levels correctly can be a pain in a back-to-back (vox-operated) configuration.
I'm in the process of building my own repeater harness for radios like the UV5R with Kenwood K1 speaker/mic connectors. I did have a play with a PIC microcontroller over the last few weeks and found that you can implement the periodic morse idents quite easily and even transmit tails (short hold-opens) with a soft K... which I've always found helps weaker break-in stations. These PICs are less than 50p per unit so I figured why the heck not : )
I'm meaning to have a go at some DTMF decoding sometime next week to see if I can't set up a remote shutdown but I'm at a loss for what else I'd want DTMF control for. Setting scheduled power-up/power-down times could be useful I suppose, for extending battery life when deployed for a weeks camping. Luckily the radios handle the CTCSS so that's one thing I don't have to worry about implementing.
I'll be posting up the code and schematic once I've got something I'm happy with though.
Yes there's a video here in youtube that did exactly that. Using the built in VOX to activate the Tx radio.
where do you found the Baofeng OEM Interface?
thanks
Gervais
Please help me :( Ive got a similar setup that i cannot get to work. Ive got two baofengs acting as my repeater, a duplexer that is properly tuned (467.675 and 462.675) and an amplifier hooked up to my TX radio. The setup works flawlessly when I am close, works as it is supposed to. However from about a block away it will no longer carry voice transmissions even though its within range and can be pinged for a curtesy tone. Any insight would be much appreciated
In spite of your duplexer the transmit side is desensitizing the receiver. My solution was to get the two radios as far apart from each other as I could and use a looooong audio cable between the radios. But I still had some desensitizing going on because I didn't have a duplexer available.
@@marcspeth4850 One thing also to consider is the possibility of the cable bringing in RF from TX to RX. Consider adding some toroid iron cores along the cable, especially before the TX or "emission" end of the box (although it can work either direction, truth be known!)
What about the required call sign announcement? Can that repeater interface be programmed with the announcement to announce every 10 minutes?
This device is basically used as a range extender, not to be set up as an area wide permanent repeater. This cant be programmed for that. Its more for emergency communications on a temporary basis.
Doesn't work!!! I was once a Sub but I notice when these TH-camrs doing it for $ and not the Hobby...YOU Dont get A RESPONSE from the creator...but when its them spending there money all you get every Question in the comments ANSWERED...LMAO..WOW
Morning and what a great Vid, were in the UK can i get the repeter interface? Could you send me a link if you no were in the UK i can get the interface
Can this be done with 2 meter mobile radios?
Why can't you use a simple audio crossover cable? Set Squelch on the Rx side and then VoxOp on the Tx side ?
Does the repeater module provide the periodic ID and remote control required for Licence Compliance? Because if not, I'm struggling to see the point of using the module : / hmmmm... actually, Morse Identity and DTMF Remoting seems like a nice easy little microcontroller project to add onto the Squelch+VoxOp system.
Still, I'd love to know the advantages of using the module over a simple audio cable.
GaryChap I did this just to try it. pretty neat
Yeah, it's a fun little free repeater setup.
I was island hopping by yacht with a few friends. We visited an island and put a baofeng repeater with a 7AH battery up in a tree on the hill so we had comms from both sides of the island. The baofengs pull so little power in receive that it lasted all week.
Simple APRS from a baofeng using a mobile phone as the terminal+gps is kinda cool too.
That's what I love about baofengs, they're so cheap you can just mess about with them and not worry.
I stripped one down and used it to monitor POCSAG pager messages for a bunch of typical first responders services nationwide I'd gathered by monitoring on my PC... so now by watching for a statistically anomalous volume of messages across about 100 users I have an Early Warning System for emergency events. I'd never have dedicated a more expensive receiver to something like that.
Interestingly, It's gone off twice. The first was a 'red activity alert' due to sustained multi-agency activity during a national emergency response exercise. I plugged it in again last July, after about 18 months in a cupboard, and left it running - I totally forgot about it until it triggered an 'orange' activity alert on new years eve. So I know it definitely works when there's something going on.
For their price you can squeeze a lot of fun out of these little FM-Only radios... and in a disaster you can afford to hand them out like candy.
I have another one for digital DMR radios, like the Baofeng DM5r. These tier1 radios can't be used on repeaters, so why not use them this way??
GaryChap how did you hook up the battery to the ht's?
+MelloB Outdoors
Two ways of doing this, depending on whether you need really long term running, or easy portability. Remember that the Baofengs need 7.4v (But work fine from 9v to 6v)
*Method 1 - 12v batteries, with voltage regulator*
If you search ebay for "Battery Eliminator Baofeng" and order by price, you'll find car cigarette adaptors for Baofeng UV-5R's for around £1.50... you'll need two.
You can either:
1. Cut the ends off and wire both into the 12v battery terminals, but make sure you salvage the regulator from inside the plug you cut off - you'll need this wired inline because UV5R's don't like 12v so much ; ) You should also use an inline fuse for safety, a 500mA slow-blow fuse is fine.
or
2. You can buy two car cigarette lighter sockets and wire those to the 12v battery so that you have two cigarette lighter sockets to plug the adapters into. The advantage is that the car adapters can still be used in a car. If you don't know what you're doing, use this second option - as the plug has a voltage regulator built in (and the line sockets tend to come with fuseholders fitted already, which is also important)
I like this method because my yacht (and cars) are good at charging up 12v packs and the batteries last forever when only running two baofengs : ) I use a fairly portable 7AH 12v SLAB battery sometimes, it's just something I had lying around from my QRP days... but a car battery would run for months.
*Method 2 - Either 6v or 7.2v batteries, Efficient because no voltage regulator needed*
If backpacking a lighter and more efficient method involves using a 7.2v battery pack (like a LiFePo pack) ... Or if you prefer a lead acid battery you can use a 6v SLAB battery using this method and it is still more efficient than the 12v SLAB method above (because no voltage regulation is needed)
To use this more efficient method you need an 'AA type' battery pack. Search ebay for "AA battery baofeng" ... they cost about £1.20 each, you'll need two.
These are designed to take six AA batteries... but instead, you can put a little hole in the bottom for a cable (use a cable entry grommet for strain relief, or just hot glue it) ... and connect the wires to the exit terminals inside the pack. Now you can connect both battery packs (in parallel) to any battery from 6v - 9v ... like a 6v Sealed Lead Acid or a lightweight 7.2v high capacity Lithium pack. Works beautifully and the current drain is a little bit lower because there's no regulator drop... it's also far lighter too which is important if you're backpacking the thing up a hill.
Either way, I'd suggest fitting a fuse too... always : ) SLABs and Lithiums can get pretty scary if shorted out, so a fuse is a REALLY good idea.
*Project - A single-purpose portable emergency repeater*
(If you use this a lot, want a semi-permanent setup or in poor weather conditions)
Grab an environment-proof plastic enclosure suitable for outdoor use, large enough to hold your battery+radios. Wire it all up using one of the methods above, and affix two SO-239 plugs through the box, using O-rings and hotglue to keep it waterproof. You can wire these connectors to an SMA pigtail inside, and connect the SMA's to the radios antenna mounts. Fix everything down inside so none of the parts move and the cables are not flexing all the time. You can even add a charge controller too with an external connector for wiring up a solar panel.
This makes a great little self-contained repeater box with no weather worries, capable of taking much larger antennas than the baofeng can fit. It also allows you to place the box lower down and hoist the antennas up separately, so that you can get really good line-of-sight signals (For hoisting antennas I use a common technique - a golfball with a screw-in eyelet and fishing line, to throw over high tree branches ... the temporary fishing line can then haul up my paracord, and my paracord is then used to haul up antennas)
But the simple back-to-back baofeng using cheap NA-771 whip antennas is usually all you really need for a quick fast ad-hoc repeater : )
Hope that helps,
Gary
Nice video, but, can I connect two radios only by audio kabel to make them work as repeater?
Yes, but the audio will be so harsh that you may not be satisfied with it
@@waylonk2453 True! And for Damir, the reason is simple. There's an impedance mismatch which the repeater box handles for you. My experience with my repeater box is the volume of the RX is roughly one-half turn, or barely over half-range when using it for optimal modulation.
Hi, I am getting lost trying to understand the programming sequences of my Baofeng UV-82. I can't get my repeater box to work... Would it be possible to send me a link or a step by step instructions in programming. Much appreciated .
th-cam.com/video/_KrH86Dzhnc/w-d-xo.html
Mine Arrived yesterday gonna try it out soon :) 👍🏻
and the result?
Do I need the repeater interface? Another TH-cam set up a 2.5mm male to a 3.5mm male to do the job.
I am a noob in the radio world. I was wondering if you could set this up to connect to other repeaters? A little explanation: I recently built my first quarter wave antenna. I'm now able to hit repeaters using my HT. I would like to use my other HTs without being tethered to my antenna. Could I set this up so that I would be able to hit this repeater and then that would transmit and receive to other repeaters?
Absolutely No way, not possible and highly illegal💉💉💉
@@democratpro Well, now I'm a little further into my radio journey and a little more experienced. If You use a part accepted radio then you set it up as a crossband repeater. It would work and it would be legal right? For example: You would set your TX (part 95 certified) radio in this repeater setup to whatever frequency and PL tone the repeater has. You would set your RX radio to whatever frequency you needed. You would then transmit from a third HT to the RX radio. That would then shift the transmission to the TX radio and send it out on the frequency with the proper PL tones for the repeater. You would set your third HT to receive on the repeaters, TX frequency and PL tones. At that point you would only be transmitting to the repeater on a part certified radio. And you can receive on a the non part 95 certified HT.
What do you think? Legal workaround? Maybe there's something I'm missing.
@@blottermad yer goin to PRISON, comrade!
Are we hearing you on radio B or on the GT3 in the background? I want the pair ( radio A and B ) to be silent.
i assumed we wouldnt hear him on radio b and that it would light up as if its transmitting, albeit i know its doing both
@@jasonbrown467 I ended up buying the interface anyway and you are correct. There is no audible output from radio B when transmitting and connected. Which is precisely what I hopped for.
@@DeepBlueDiscoveries825 nice, glad to hear, i want to set this up as well
For that setup I just used a cable with 2 earphone plugs ( 1on each end ) and connector to make one smaller, so the frequency set up is the same just a single cable would be a cheaper way
I'm looking to be able to talk both ways ( yaesu ft-757 gx to baofeng uv5+plus )
I got it working with my cheap cable, only needed to put 757 mic next to baofeng so the 757 could hear it
So I would like to know would it work both ways around ?
As I'm thinking of buy the cable you are using.
Uv5 - vhf/uhf 757 - hf radio ( fm, am, Cw, sub,lsb )
Hey dumb question - wouldn't it be better to cross band repeat so that the receiver isn't de sensetized every time the Tx comes on?
It depends on your definition of "better". Suppose you have radios that have only one band, i.e. the Baofeng 888S (UHF only). No crossband/split frequencies there. Two UV-5Rs would be fine in a crossband setup, though.
Hey Nathan. Not a dumb question at all.
Yes, cross-banding usually reduces swamping/splatter problems... but it's usually best to solve the problem and run a normal single-band repeater where possible.
In addition to what Austin said - remember also, that even if your users do have dual-band units ... not all can be set up for cross-band duplexing. The baofengs are a bit weird - they cannot access cross-band repeaters using duplex mode from the radio settings - you have to use the chirp programming software to create a cross-band duplex memory channel.
To set up cross-band user operation without chirp you have to use two simplex channels and the dual-watch mode.
1. Set up VFOa (repeater input) and VFOb (repeater output) on their correct band/frequency
2. Turn on dual watch, so that the radio scans both VFO's for activity
3. Set VFOa as the active VFO (The one that is used when you press transmit)
4. Lock the keypad - that ab button is too easy to hit accidentally ; )
You should now be able to access the cross-band repeater easily.
If you get out of range of the repeater, your group-members radios will automatically communicate directly via VFOa. That can be useful, but can also leave you with a false sense of security and not realising that you're out-of-range of other groups or your base camp. So, remember to check in regularly if that's important.
TIP: If you ARE in range of the repeater and a member comes in barely readable on VFOa (direct) ... briefly raise the squelch. This cuts off the signal briefly and causes the dual-mode monitor to move on to VFOb, where it gets locked on the better VFOb signal. If there is no VFOb signal (maybe out of repeater range) it will just land right back on the VFOa signal anyway. So, it's always worth 'jogging the monitor'
Obviously, if you can set all the radios up in advance you can use the 'split' option in the chirp software to create a proper cross-band channel, but it's always useful to know how to set up cross-band operation manually in case you need to do it in the field.
Also, remember that cross-band for the sake of it is always a bit of a trade-off and means asymmetric performance.
But I'd still say look at your repeater setup and try to resolve the swamping issue first.
Gary
+Jerry Kuhn
Thanks for that, and you're absolutely right.
I do think it depends on when/where your Baofeng was made though. I have two that don't properly create crossband offset from the interface. My friend has a unit which does, so we sat them side by side and mirrored the exact same keypresses ... same problem. We finally did a factory restore but the affected units still don't set up crossband.
I think there have been some poorly documented revisions to the firmware over time. But you're absolutely right, I've bought others since which work perfectly.
Luckily, my old two are now both stripped down to the boards and I'm controlling the SDR (RDA1846) directly from a PIC chip for long range telemetry with my yacht alarm system. Basically, it chirps me with alarm state, battery voltage, bilge pump seconds, inside/outside temperature and inside humidity from 3 miles away. The local unit decodes the data and writes to a display panel in my shack.
The UV-5R's are amazing little things : )
What I meant by cross band repeating originally was UHF on one radio to transmit and VHF on the other radio to receive or vice versa. Receiver sensitivity gets completely smashed when one of the radios is transmitting this close to the receiving radio on the same band, which is why the amateur satellites always do cross band repeating. The radios in the video are both capable of UHF and VHF, so it only made sense in my opinion to cross band repeat, since the capability is there. Has nothing to do with the firmware or anything like that. All that is needed hardware and firmware wise is shown in this video. I have a UV8D that is capable of cross and repeating on it's own, but that is not what I am talking about. I am talking about using two radios with the cable shown, one on VHF, one on UHF, one receiving and one transmitting. And as far as the operators using UV5Rs, it is capable of cross band splits programming it through chirp.
+Nathan JR
Agreed. The only proper way to repeat in the same band is to use tuned cavities (notching) as far as I am aware, but the cost of those defeats the purpose of an ad-hoc baofeng repeater. With 5w units it IS possible with a little distance, careful choice of frequency offset, etc ... but it's a hassle. Vertical separation of antennas is more effective than horizontal separation but then you're sacrificing height which can make the whole endeavour pointless unless you've got natural height by virtue of a hill or crag.
It ain't always straightforward by any means but it's certainly doable, particularly at low wattages, with a little experimentation. I've deployed them many times in the same band without major problems, but placement is key.
I guess the best advice is to always favour cross-band if at all possible.