Cross band repeat is very handy. I use 446 in and 2m repeater pair. Say You have a truck on top of the mtn, and your on your quad below in the valley. Sure it nice to have solid contacts. Used it for miles. Works well. Just use low power on tx ! So you a good battery when you get back. Also if there is a hill aim it slightly downhill so you can bump start it if Need be.
Was just discussing this with my little group. Was mentioning things like de-sense, diplexers, some of the more advanced topics. My recommendation to them was that they should get two separated mobiles or at least a receiver and a mobile, good receiver so as to have sensitivity and good rejection. I picked up the 9800 when they first came out and got one of the worst ones , and remember the desence I heard , compared to what I hear on my Yaesu 8900. That said, one can learn a fair amount about repeaters if you try with these systems. One needs to learn about CORs and Tone systems ect. And , Time out Timers.
That is really cool. I had no idea you could set the offset on the Baofengs like that. Just did it on mine and it worked. I have a couple radios that have cross banding too. Haven’t done much with the feature though. This video gives me some ideas though. There are allocated auxiliary repeater frequencies in the band plan that I believe could be used for this type of application. Also make sure you have the time out timer enabled as you do need some way to shut it off should a problem arise. Great video. 73.
I think the one-way transmission may actually result in another FCC issue: you're now broadcasting, one-way communication is explicitly prohibited outside of a handful of exceptions (and that mainly being the "anything goes for safety of life or property", and I think a few other bulletin and whatnot announcements)
Nice video. I like the idea of using the raspberry pi for a controller. You could use it to also gather statistics such as power usage and send voltage telemetry with the ID, record the audio transmissions, some other stuff. Thanks for the ideas. W0GPR
I never got around to building the IDer but it should only require a Pi and a sound card to interface with the Pi. Depending on the sound card, it might also require something for PTT control.
I'm building something similar with my TYT TH-9800. I was going to use a lead acid battery but you have me wondering if I should use something like what you have done here.
I have recently upgraded mine to LiFePO4. Look up Miady LiFePO4 on amazon. They are dirt cheap and perform fairly well. I refer to them as the "Baofeng" of batteries.
Doesn't the repeater need its own call sign? What are FCC rules concerning operator control? As in being able to shut it down in case of malfunction, for example.
The crossband repeater uses simplex frequencies but is repeating the received signal. The offset is needed since the crossband repeater receives in the 70CM band but transmits in the 2M band. If we set the HT's to 70CM only, we wouldn't receive the signal being sent from the crossband repeater in the 2M band. 73, de KM4ACK
Do you know the IC2730a Icom? I want to turn something into a mobile repeater. I'm looking for something to use in my Jeep for when I go hiking with my baofeng and my Jeep buddies. I'm looking at an IC2730a but I'm looking for someone to guide me. I'm a newbie.
That looks handy. Have you done any run time tests yet? I imagine it can go for a while..all depending of course on the amount of TX time. Keep up the useful vids 73 de KF7VUT
On a tangent... now that I know the UV5R can do a huge offset, I bet it can be tasked with satellite splits in a series of memories to compensate for Doppler shift. I have a quad-band version of that mobile rig. Did you know 2 of them can be connected with an RJ-45 to be a repeater within the same band? Thanks for the videos & info.! (sorry for my A.D.D. moments) -Rob
Rob, your comments are always welcome and insightful. Didn't know that 2 of the radios could be linked together via RJ45. Yes, I would assume you could use the baofeng that way when working satellites. Thanks for watching! 73, de KM4ACK
@@KM4ACK I've never tried the 2-radio setup, but mine came with a cable for detaching the face plate. That cable can be used to tie the radios together and then the settings are in the same menu pathe as the cross-banding selections. Of course, you still have all the repeater issues to deal with once in the same band as far as antenna separation or duplexers etc.; ID announcements and so on. One other thought... that mobile rig has an 'x-twrpt' setting... this allows each handheld to stay on a fixed uhf or vhf freq with the other guy in the opposite configuration. Might be easier to set up for the HT user. Keep up the great videos! (I just started looking into the pi-star info.)
Do I need FCC permission to operate a home brew repeater for personal portable use like sports events and disaster preparedness training with other hams.
Video was worth it just for the knowledge that you can do a huge offset with a UV5R.
I was totally amazed that the Baofeng would accept that much offset. Thanks for watching! 73, de KM4ACK
@@KM4ACK The Boafeng supports xbanding in chirp.
Cool! Thanks for the tip. 73, de KM4ACK
Looks like he has just another overpriced UV5R variant.
Cross band repeat is very handy. I use 446 in and 2m repeater pair. Say
You have a truck on top of the mtn, and your on your quad below in the valley. Sure it nice to have solid contacts. Used it for miles. Works well.
Just use low power on tx ! So you a good battery when you get back. Also if there is a hill aim it slightly downhill so you can bump start it if
Need be.
Another thoughtful well done video. Thanks K2JML
Thanks James! Have a great weekend. 73, de KM4ACK
I really enjoy your videos! Great quality and content. Thanks for what you do, looking forward to more videos in the the future!
Thanks Joshua! Wouldn't be worth the journey without the viewers. Thanks for watching! 73, de KM4ACK
Thanks for the shoutout to this new Patreon subscriber! de W3DJS in Atlanta, GA
Thank you for supporting my work! 73, de KM4ACK
@@KM4ACK Happy to support your good work! Keep it up!
Was just discussing this with my little group. Was mentioning things like de-sense, diplexers, some of the more advanced topics. My recommendation to them was that they should get two separated mobiles or at least a receiver and a mobile, good receiver so as to have sensitivity and good rejection. I picked up the 9800 when they first came out and got one of the worst ones , and remember the desence I heard , compared to what I hear on my Yaesu 8900. That said, one can learn a fair amount about repeaters if you try with these systems. One needs to learn about CORs and Tone systems ect. And , Time out Timers.
That is really cool. I had no idea you could set the offset on the Baofengs like that. Just did it on mine and it worked. I have a couple radios that have cross banding too. Haven’t done much with the feature though. This video gives me some ideas though. There are allocated auxiliary repeater frequencies in the band plan that I believe could be used for this type of application. Also make sure you have the time out timer enabled as you do need some way to shut it off should a problem arise. Great video. 73.
Thanks Mike. The offset really surprised me. Both the TOT and aux frequencies are great tips to keep in mind! 73, de KM4ACK
Awesome setup and explanation
Thank you. And thanks for supporting the channel by watching the vid. 73, de KM4ACK
I think the one-way transmission may actually result in another FCC issue: you're now broadcasting, one-way communication is explicitly prohibited outside of a handful of exceptions (and that mainly being the "anything goes for safety of life or property", and I think a few other bulletin and whatnot announcements)
Can you do an updated build with updated equipment please?
Beofeng can be programmed for split also within Chirp. I guess either way works though.
I'll have to try it in chirp with the UV5RE+ and see if that radio will take it that way. Thanks for the tip. 73, de KM4ACK
See you in the AM Sat hopefully. Hope the controller IDer link goes through.
I'll stop by your table when I get onsite. 73, de KM4ACK
Nice video. I like the idea of using the raspberry pi for a controller. You could use it to also gather statistics such as power usage and send voltage telemetry with the ID, record the audio transmissions, some other stuff. Thanks for the ideas. W0GPR
Absolutely. Adding the pi could open up all kinds of possibilities. Got to put that on the to-do list. Thanks for watching! 73, de KM4ACK
@@KM4ACK Have you done anymore with the pi project?
@@Jay-hr9ci that project got stuck on the back burner. So many projects, so little time. :-(
73 thanks
Thanks for watching. 73, de KM4ACK
Are there preferred freqs to use for crossband repeat? Agreed upon as the freqs to use. This could be for traveling the Country or to prevent QRM
Thank you for the awesome video, question how much would it cost to put together the pie IDer let me know and thanks.
I never got around to building the IDer but it should only require a Pi and a sound card to interface with the Pi. Depending on the sound card, it might also require something for PTT control.
I'm building something similar with my TYT TH-9800. I was going to use a lead acid battery but you have me wondering if I should use something like what you have done here.
I have recently upgraded mine to LiFePO4. Look up Miady LiFePO4 on amazon. They are dirt cheap and perform fairly well. I refer to them as the "Baofeng" of batteries.
Doesn't the repeater need its own call sign? What are FCC rules concerning operator control? As in being able to shut it down in case of malfunction, for example.
You can use your callsign if you are the control operator. This particular rig has remote kill capability via DTMF. 73, de KM4ACK
What and why such an offset for a receive setting? 288.0? Simplex doesn't use offsets? Thanks
The crossband repeater uses simplex frequencies but is repeating the received signal. The offset is needed since the crossband repeater receives in the 70CM band but transmits in the 2M band. If we set the HT's to 70CM only, we wouldn't receive the signal being sent from the crossband repeater in the 2M band. 73, de KM4ACK
There’s an RPi repeater project at openrepeater.com. I assembled parts to build one a couple of years back but got sidetracked with other project.
Similar story here. I need to revisit that project soon. 73, de KM4ACK
Do you know the IC2730a Icom? I want to turn something into a mobile repeater.
I'm looking for something to use in my Jeep for when I go hiking with my baofeng and my Jeep buddies.
I'm looking at an IC2730a but I'm looking for someone to guide me. I'm a newbie.
Sorry. Not familiar with that radio.
That looks handy. Have you done any run time tests yet? I imagine it can go for a while..all depending of course on the amount of TX time. Keep up the useful vids 73 de KF7VUT
Not yet. But will will give it a stress test once deer season opens up. 73, de KM4ACK
On a tangent... now that I know the UV5R can do a huge offset, I bet it can be tasked with satellite splits in a series of memories to compensate for Doppler shift.
I have a quad-band version of that mobile rig. Did you know 2 of them can be connected with an RJ-45 to be a repeater within the same band?
Thanks for the videos & info.! (sorry for my A.D.D. moments)
-Rob
Rob, your comments are always welcome and insightful. Didn't know that 2 of the radios could be linked together via RJ45. Yes, I would assume you could use the baofeng that way when working satellites. Thanks for watching! 73, de KM4ACK
@@KM4ACK I've never tried the 2-radio setup, but mine came with a cable for detaching the face plate. That cable can be used to tie the radios together and then the settings are in the same menu pathe as the cross-banding selections. Of course, you still have all the repeater issues to deal with once in the same band as far as antenna separation or duplexers etc.; ID announcements and so on.
One other thought... that mobile rig has an 'x-twrpt' setting... this allows each handheld to stay on a fixed uhf or vhf freq with the other guy in the opposite configuration. Might be easier to set up for the HT user.
Keep up the great videos! (I just started looking into the pi-star info.)
Do I need FCC permission to operate a home brew repeater for personal portable use like sports events and disaster preparedness training with other hams.
No. Just make sure you are not interfering with others or other repeaters in your area. 73, de KM4ACK
Very cool. Never tried that. 73 KA9WLU
Thanks for watching! 73, de KM4ACK
or you can connect the radio to the computer,and use zello crossband,so you dont need the baofengs you can just your phones lol :)
He's saying he gets one radio to receive and transmit simultaneously. I think not.
I am and it does. Look up cross band repeat.