The Open-Source TNC. Now Shack-Ready.

Upgrade your digital station to the modern era with the NA6D OpenTNC, the premium evolution of the open-source TNC.

We have taken the versatile architecture designed by David Platt (AE6EO) and refined it for the serious operator. While our original development kits were designed for tinkering, this new edition is designed for operating. We’ve shrunk the footprint, optimized the circuit, and encased it all in a rugged aluminum enclosure that belongs on your desk or in your go-kit.

Why the NA6D Edition?

The original OpenTNC is a fantastic platform, but we wanted to make it better for everyday use.

• Rugged Aluminum Case: Say goodbye to exposed PCBs and 3D-printed plastics. Our custom aluminum enclosure provides superior durability and helps shield your sensitive RF equipment from digital noise.
• Compact Footprint: We redesigned the PCB to be significantly smaller, making this the perfect TNC for go-kits, portable operations, or crowded shack desks.
• Optimized Audio Path: We have refined the component values in the TX audio filtering stage (fixing the quirks found in the v0.8 beta designs) to ensure cleaner audio and broader compatibility with modern transceivers right out of the box.

Powerful Digital Modes

Just like the original, the NA6D OpenTNC is a powerhouse for AX.25 communications. Powered by the RP2040, it unlocks:

• APRS: Track locations, send messages, and map local traffic.
• Packet Chat: robust keyboard-to-keyboard QSOs.
• BBS Access: Connect to local mailboxes and emergency networks.
• KISS Mode: Full compatibility with modern software suites for advanced networking.
• And more...

Since the OpenTNC is a traditional TNC, it does not support software TNC modes, like VaraFM.

Technical Specifications:

• Core: RP2040
• Connectivity: USB-C (Power/Data), DB-9 (Radio/Audio)
• Enclosure: Black Anodized Aluminum
• Dimensions: Approximately 64mm x 40mm x 24mm [w x l x h]

Cables:

We're still working on getting cable and initial production runs might not have custom cables. We're working on offering cables for:

• Mobile/Base radios with a mini-DIN 6 connector (common modern "data" connector)
• HTs with the 2-Pin Kenwood connector
• If you are interested in other connectivity, you can fill out the survey after signing up for notifications to let us know.

Wait-list status:

We are currently finalizing the prototypes and production runs. By signing up now you'll be the first to know when the OpenTNC is available. 

⚠️ Subject to change: The listed price, photos, and specs are estimated and may change on final release, but changes should be minor.