Note that 2.0, 1.8a version is now available for backorders and we plan to ship before middle of May.
1.7b version still available for sale.
Description
We’re excited to introduce the KV4P-HT as a fully assembled, ready-to-use kit! Designed by Vance KV4P Vagell, this portable, open-source VHF radio kit transforms your Android phone into a handheld radio transceiver. For detailed insights, visit KV4P’s website.
At Chelegance, we’ve listened to feedback from enthusiasts who were excited about the KV4P-HT project but faced challenges such as:
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Sourcing quality components
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Ordering PCBs internationally
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Limited experience with 3D printing enclosures
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Soldering and assembly difficulties
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etc..
To address these hurdles, we’ve simplified the process by providing a ready-to-use kit that retains the original design without modifications. We’ve carefully sourced and tested the components to ensure the quality, making it easier for you to enjoy this innovative project hassle-free.
Currently, we have three versions available for sale. The 1.7b and 1.8a versions share the same PCBA dimensions, while the 2.0 version has a different size. However, both the 1.8a and 2.0 versions feature an enhanced VHF low-pass filter compared to the 1.7b version. Additionally, the 2.0 version includes two PTT buttons, allowing direct PTT usage without the need to press the transmit key in the app.
Additionally, any future modifications we make will be open-sourced to contribute back to the community.
| Version | KV4P HT 1.7b | KV4P HT 1.8a | KV4P HT 2.0 |
| PCBA Size | 3.4cmx9.8cm | 3.4cmx9.8cm | 3.8cmx8.2cm |
| PTT button | Not include | Not include | Two PTT button |
| Features | /
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VHF low pass filter，allow more transmit power and boost receive sensitivity. | VHF low pass filter，allow more transmit power and boost receive sensitivity.
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| PCBA photo |  |
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| Outer packaging |  |
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| Part List |
· 1 X KV4P-HT KIT ASSEMBLED – ◦ 1 X KV4P-HT PCBA 1.7b; ◦ 1 X 3D PRINTED CASE FOR KV4P HT; · 1 X VHF SMA ANTENNA; · 1 X OTG ADAPTOR(TYPE-C TO MICRO USB); · 1 X DATA CABLE(TYPE-C TO MICRO USB); |
· 1 X KV4P-HT KIT ASSEMBLED –
◦ 1 X KV4P-HT PCBA 1.8a; ◦ 1 X 3D PRINTED CASE FOR KV4P HT; · 1 X VHF SMA ANTENNA; · 1 X DATA CABLE(TYPE-C TO TYPE-C); |
· 1 X KV4P-HT KIT ASSEMBLED –
◦ 1 X KV4P-HT PCBA 2.0; ◦ 1 X 3D PRINTED CASE FOR KV4P HT; · 1 X VHF SMA ANTENNA; · 1 X DATA CABLE(TYPE-C TO TYPE-C); |
HOW TO USE
（Most of the photos below are from KV4P-HT 2.0
- Unbox Your Kit
Open the package and take out the KV4P-HT along with the included components.
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Connect the AntennaAttach the SMA Male Antenna provided in the kit to the KV4P-HT.
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Connect to Your Android PhoneUse the DATA cable to connect the KV4P-HT to your Android phone.※For the 2.0&1.8a version, you will need to connect data cable (TYPE-C TO TYPE-C)directly to your phone※For the 1.7b version, you will need to connect the OTG and data cable included in the package
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Install the Android App
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Search for “KV4P HT” on the Google Play Store or use the direct link to download the app.
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The app requires Android 8 or higher, which was introduced in 2017. Most modern Android phones with a USB-C connector are compatible.
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Flash the Firmware
The first time you open the app, it will automatically flash the firmware onto your KV4P-HT. This process takes approximately 1–3 minutes. - Get on the Air!
Once the setup is complete, you’re ready to start using your KV4P-HT handheld transceiver! For the 1.7b and 1.8a version, you need to press the transmit button in the app. However, with the 2.0 version, you can send directly using the PTT button.
