Kv4p HT – A homebrew 1W radio (VHF or UHF) that plugs into an Android phone

2026-05-16 | original

read original get RTL-SDR Blog V3 → more articles

Why This Matters

The kv4p HT represents a significant advancement in DIY radio technology, enabling enthusiasts to convert their Android phones into fully functional handheld transceivers. Its open-source design promotes innovation and accessibility for the maker community, while also emphasizing the importance of licensing and responsible use. This development could inspire more customizable, off-grid communication solutions for hobbyists and emergency preparedness.

Key Takeaways

Transforms Android phones into handheld radios via USB-C connection.
Open-source design encourages DIY customization and innovation.
Requires amateur radio licensing and carries no warranty or guarantees.

Radio for the modern maker kv4p HT is a homebrew 1 watt radio available in VHF or UHF that plugs into your Android phone's USB-C port, transforming it into a fully-featured handheld transceiver. Completely off-grid. Completely open source.

Note: kv4p HT is an open source project you build yourself. It has absolutely no warranty, or guarantees on functionality or reliability! Requires at least a Technician class amateur radio license to use. That said, have fun. :)

Explore topics: kv4p ht android phone usb-c handheld transceiver open source