On pre-order. Expected ship date: January 2025. Images are temporary.
Turn your Android phone into a modern ham radio transceiver. Learn more at kv4p.com
What is it?
kv4p HT is an open source 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.
NOTE: kv4p HT is an open source project. Halibut Electronics makes pre-made v2 boards and accessories available for hams who want the Product, and not necessarily the Project. All the design files for this product are available at kv4p.com. You are free to make your own version of this product.
NOTE: kv4p HT as sold by Halibut Electronics is a “partial kit.” The board is mostly assembled, but the user (that’s you!) solders the SA818-V module on the board, puts it all in the case, and attaches it to the phone.
Features
- 100% ham radio, always completely off-grid
- Crystal-clear 44kHz 8-bit ADC/DAC audio, with filters and squelch
- Texting with notifications just like SMS — radio-based APRS messaging (not just location) with built-in 1200 baud modem
- Scan through unlimited memories and groups
- No battery means nothing to charge except your phone
- 1 watt transmit can go miles yet sips your phone’s battery
- Accessibility options: live closed captions (on supported phones), turn off animations, sticky PTT with haptic feedback
What comes with the Halibut Electronics kv4p HT?
- kv4p HT main board, v2. This includes:
- Preprogrammed ESP32 microcontroller, with USB-C to the phone
- VHF low pass filter
- SMA female antenna connector
- Various other support parts: buttons, LEDs, etc.
- Optional: SA818-V RF module. (Optional in case you already have one.)
- Optional: 3D printed case
- Optional: Antenna, Dual Band 2m/70cm
- Optional: USB-C “U shaped” connector
What does NOT come with the Halibut Electronics kv4p HT?
- Android phone
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