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KV4P
เข้าร่วมเมื่อ 29 ก.ย. 2024
Videos about amateur radio, and especially the kv4p HT homebrew handheld radio for your Android phone.
kv4p HT introduction - turn your phone into a modern ham radio transceiver
See kv4p.com for details and build instructions!
kv4p HT is a homebrew VHF radio that makes your phone capable of voice and text communication completely off-grid with at least a Technician class amateur radio license.
The radio simply plugs into the USB C port on your Android smartphone and transforms it into a fully-fledged handheld radio transceiver. It's completely open source (GPL3): the Android app, ESP32 firmware, PCB designs, and 3D printer files.
It's small enough to fit in your pocket and take anywhere, and since it has no internal battery it's the perfect radio to put in a go-bag or your car's glove compartment.
00:00 Overview
01:35 Rx and tx audio
01:52 Text chat and notifications
02:52 Features
04:16 Settings
04:51 Accessibility
05:35 Closed captions demo
kv4p HT is a homebrew VHF radio that makes your phone capable of voice and text communication completely off-grid with at least a Technician class amateur radio license.
The radio simply plugs into the USB C port on your Android smartphone and transforms it into a fully-fledged handheld radio transceiver. It's completely open source (GPL3): the Android app, ESP32 firmware, PCB designs, and 3D printer files.
It's small enough to fit in your pocket and take anywhere, and since it has no internal battery it's the perfect radio to put in a go-bag or your car's glove compartment.
00:00 Overview
01:35 Rx and tx audio
01:52 Text chat and notifications
02:52 Features
04:16 Settings
04:51 Accessibility
05:35 Closed captions demo
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kv4p HT step-by-step build instructions - turn your phone into a modern ham radio
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Turn your Android phone into a modern ham radio transceiver. In under an hour, build a 100% open source kv4p HT for less than $35 of parts. Follow along with the written guide here, and find links to necessary software, 3D prints, and PCB designs: kv4p.com/quick_start.html This video is the companion to those instructions, and shows every step of the build and test process. 00:00 Soldering the ...
Is there any disadvantage of SA818 VHF (134~174MHz) vs DRA818V 144MHz 145MHz 146MHz 154MHz 174MHz? Seemed the same accept for the 134Mhz band. The SA818 is cheaper and included both the VHF and UHF modules
Amazing! Perfect when out cell range but in range of repeaters.
This is amazing!!! Does it support a translator for morse code to text?
Like it! Thanks for delivering it.
Very cool project, building one now but the pin rows aren't wide enough. I'm going to clip the pins on one side and put in jumpers. Did PCBway get it wrong or is the a different spaced esp32 available.
Unfortunately ESP32 dev boards have turned out to be variable depending on the manufacturer. We're working on a PCB variant that can support the narrow version you got, as well as the original wider version. The one you received should work fine if you bend the pins or use a riser to make it fit in the board (others have done this). Note that I think that ESP32 might not have 5.1k ohm pull-down resistors needed for Android to recognize it and power it. To get it to work, use one of the 2 connector options listed on Quick Start on kv4p.com, those both include the pull-down resistors built-in.
Amazing. My parts are on their way and I just received 5 boards from JLPCB. I only need 2, but ya never know....
How legal is this in your country? Ours is in the grey area since its not imported/purchased per se but DIY but also produce and receive signals which actually controlled by the government
Are you using lead-free solder?
Is there plans to sell fully built ones?
Already ordering parts! Cant wait to DIY this!
I just ordered the PCB with assembly and also having PCBWay print the case and stand. Can't wait for everything to arrive! Thank you for this project.
Get in contact with the guys at Trex weapons/ Tech.
Hi Vance! Thanks for the amazing project! A group of hams in our club will build the HT here in London, Ontario! Thanks! Jorge VE3EAD
@1:28 Pooch: “ no matter how hard I try, I can never figure out who in the heck he’s talking to”
Finally! Something to do with all the phones rendered "obsolete." Brilliant! Your dog is a master photobomber as well.
That's neat ! I guess it wouldn't be too hard to produce a dualband version with reduced power output, even better if a charging port is included.
Mesh networks for chat. Opens up ability to send messages to specific people on open channels. Also, Atak Civ compatability. I know i' suggesting this as if it were something super easy but i'm just throwing out the potential i'm seeing.
I'm looking to use something similar to this project as a motorbike intercom. In this regard, I have a question: does the app have a VOX mode or support for external PTT buttons? For the case of moto intercoms it is critical to speak hands-free.
Hi - did you make & design this i.e. the app & the VHF module? If so very impressive. Can it be made to transmit at 5w?
Amazing. What is the approximate range in the city?
is it ok to use a simple wifi antenna? why you use esp32, just because of connecting it to phone?
hi. nice project. i have a question. how to put offset value?
I love how you write the "test repeater" 😂
Is there a 70cm option?
Amazing! I was at the demo at the DFMA meeting, glad I brought my Yaesu!
Looks quite interesting. Would have love to have one if it were available in my region. 73 Jon VU2JO
1:17 will it work on gmrs repeaters?
Turn your cutters the other way for an even deeper cut. The solid back to the item being cut.
Ok this is an awesome idea!
This is awsome, i have a GMRS license and radio but i dont understand how to put frequencies in and use it only for the weather channel. but this is robust to use with family.
I think it would be easier and cheaper just to buy a Baufeng or a Quanshang radio that way you can get way more than just 2 meters.
Thanks for taking a look! This project is mainly for people who like to tinker :)
I so want to build this but alas it's for Android only.
Come over to the dark side, we have cookies (and ham)!
This is for android only? Any plans for iPhone compatibility?
A couple community members are looking into it, but I don't personally have plans to port it to iOS (I'm not familira with iOS development at all).
Would be nice to be able to download the apk for the app directly from your website; with a de-googled privacy phone, the play store is unavailable and downloading apps from alternative sources carries some risk of tampering...
You're in luck, we already have this! You can find the official APK for v1.0.0 here (and future releases will also contain an APK if/when you want to update): github.com/VanceVagell/kv4p-ht/releases/tag/v1.0.0
Dear Mr .. any place we buy buy these things? Tx
We have a #group-orders in the Discord where some people are buying them together or selling extra ones they built but don't need. And I expect a few companies to offer kits and complete units in the next few weeks, when that's available I'll add links to kv4p.com.
Cool.
Thanks, 73!
I’m on a Sailboat is your unit capable of the frequencies for a single side band radio Do you have a unit all ready made up for purchase for a Apple
kv4p HT is ham radio only, not any nautical radio bands. Some community members are looking into porting it to iOS, and others are planning to sell it. I'll add a Community page to kv4p.com soon once I have links to their work to share.
I’m on a Sailboat is your unit capable of the frequencies for a single side band radio
kv4p HT is ham radio only, not any nautical radio bands.
I recommend for pcb module HF 27 Mhz CB Radio
Thanks for taking a look!
It would be possible to make a standalone device with the lilygo tdeck as a base?
Sure, it's open source so you could modify it to do whatever you like. :)
Congrats on an ingenious in genius invention. But I am wondering what is the point of it, since if you have a cell phone & the person you want to talk to or text to has a cell phone, why don't you just use the cell phone as a cell phone? Or is this for places where there is no cell phone service? How many such places exist in the USA? It seems that for me the catch in the home brewing would be that I don't have access nor how to use a 3D printer.
Thanks for taking a look! It's mainly a fun tinkering project for amateur radio enthusiasts who like to build and modify their own gear.
Is there are future upgrades to maybe take the power upto 5w?
Maybe! It would probably require a separate battery, since the phone likely won't provide that much over the USB connection.
First time I've come across this. I love it! Thank you for putting in the time & effort to make a super cool addon. 73's G7DMQ
Thanks for taking a look, and the kind words! 73
Sir, if you marketed the entire package together, I think you would make a lot of money. This is a very simple and easy way to be able to communicate with others. Thanks for the heads up!
Thanks! I'm not looking to start a business, I have a day job :) But there are a number of community members and businesses who are preparing kits and pre-built units. When they're ready, I'll post links on the kv4p.com site
8:25 I learned directly from Signal Stuff why their Signal Stick is such a killer antenna, it's NOT a 1/4 wave... it's a a 5/8 WAVE!
Thanks for taking a look! The Signal Stuff website says "1/4 wave on 2 meter (144-148 MHz)" at least for the version of the antenna I link to on kv4p.com. But you could use any 2M antenna with it, even a 5/8 one if you want a big honking whip on your smartphone haha.
"Professionals" use flux for good reasons! Faster heat transfer so you don't ROAST components, cleans oxides and prevents cold solder. USE FLUX!
Totally agree! 73
@@KV4P I have a buddy who grew up around electronics, working in a CCTV shop with his Dad. All the soldering they'd done and he'd never heard of using flux? I showed him what using added flux besides flux core does and it blew his MIND how much easier it made life!
Very Nice, Thank You 73's
Thanks for taking a look! 73
What about us iPhone hams?
Get an old android...
A few community members are looking into an iOS port, but it could be some time before that's possible.
This doesn’t need to be stuck on the phone just need bluetooth or wifi link to your phone so the App can run, this unit can be place in car or your house with hook up to external antenna for greater range acting like mini repeater, you can carry the unit & setup anywhere such as camping, while driving, while at the office, you just have to be in the range of wifi or Bluetooth like a mini hot spot, just my opinion VE6US✨👍🌞🙏🏻
Thanks for taking a look! Some other community members have requested a variant like this, so I wouldn't be surprised if a community member contributes one. I agree it would be a lot of fun.