New: VAIL SUMMIT - A portable ham radio toolkit & CW trainer. Public beta now available, $89.99. New: VAIL ZOOMER - Send Morse code during Zoom, Teams, Discord & more.
For CW Enthusiasts

The Ultimate Morse Code Interface

Connect your Morse code key to any computer for practice, training, and on-air operation with zero-delay sidetone.

Zero-Delay Sidetone Open Source Works with Zoom ∞ Compatible Apps From $22
Vail Adapter

Three Ways to Use Your Adapter

The Vail Adapter operates in three distinct modes. MIDI and Keyboard modes switch automatically, while Radio mode is entered manually for on-air operation.

MIDI Mode

Configure settings and practice with vailmorse.com's built-in decoder and worldwide internet repeater.

Keyboard Mode

Use with VBand, Morse Invaders, training tools, and other browser-based apps that accept keyboard input.

Radio Mode Advanced

Key your radio directly for on-air CW operation. Works standalone or connected to a computer.

Why Choose the Vail Adapter?

The Vail Adapter offers superior functionality over alternatives, giving you the best experience for both learning and practicing Morse code.

Zero-Delay Sidetone

  • Instant hardware-based audio feedback
  • No latency like web-based solutions

Three Operating Modes

  • MIDI, Keyboard, and Radio modes
  • Key your radio directly (Advanced)

Universal Compatibility

  • Works with straight keys, bugs, cooties
  • Supports Iambic A and B paddles

Practice Oscillator

  • Practice anywhere with USB power
  • No computer or internet needed

Works with Video Calls

  • Send CW during Zoom, Teams, Discord
  • Talk and key at the same time
Learn More →

Elegant Design

  • Purpose-built PCB with 3D printed case
  • Compact and tidy solution

Get Your Vail Adapter

Choose the option that works best for you. You can build it completely from scratch or get a ready-made version.

Choose Your Option:

Option 1: Build It Yourself (No PCB)

Who this is for: DIY builders who want to source their own parts and hand-wire an adapter from scratch. There's nothing to buy from us.

Source the components yourself and follow our open-source project on GitHub to build your own Vail Adapter from scratch.

DIY Vail Adapter GitHub Project

Required Components:

  • Seeed Studio XIAO SAMD21 or Adafruit QT Py
  • Buzzer Speaker
  • Panel Aux Jack
  • Optional: 3D Printed Case (Download Model)

DIY Assembly Instructions:

These guides are only for the hand-wired build above, not for PCB kits purchased from our shop.

Easy Assembly Guide

Advanced Assembly Guide

Option 2: Order PCB Version

Who this is for: Anyone who wants the easiest path to a finished adapter. No parts sourcing, soldering, or electronics experience needed.

Get a professional PCB version with custom enclosure. Ships fully assembled and ready to plug in, or as a kit if you'd enjoy putting it together yourself.

Vail Adapter PCB View All Devices

Kit Assembly Instructions:

Ordered the assembled version? There's nothing to build, just plug it in. These instructions are only for kit orders (and they're not the Option 1 DIY guides).

PCB Kit Assembly Instructions

Latest Updates

We're constantly improving the Vail Adapter with new features based on user feedback.

Latest

Vail Summit Public Beta Now Available

The Summit is a standalone CW trainer and ham radio tool in a black enclosure that folds closed. Learn CW, practice, play games, log contacts, key your radio, and get on the Vail repeater, all without a computer. $89.99 assembled with free US shipping. Due to demand, Summit orders typically ship within 2 weeks.

Learn More Order on shop.ke9bos.com
View previous updates
February 2026

Vail Zoomer - CW in Video Calls

Share Morse code with friends during Zoom, Microsoft Teams, Discord, and any video conferencing app. Talk and key at the same time - everyone on the call hears your CW. Learn more.

January 2026

Button Hat Add-On Now Available

Record and playback CW memories, adjust speed and sidetone settings, all without a computer. Perfect for contesting and POTA operations.

October 2025

Recent Improvements

New sidetone mute shortcut (hold dit for 5 seconds). Fixed keyboard mode control key issues.

May 2025

Practice Oscillator & Keyboard Sidetone

Practice anywhere with just USB power. Local sidetone now works in keyboard mode too.

Compatible Apps & Tools

Your Vail Adapter works with these websites and apps for practice, training, and fun.

Vail Zoomer New

Send Morse code during Zoom, Teams, Discord & other video calls.

Learn More →

Vail Internet Repeater

Practice CW with others worldwide in real-time.

Visit →

VBand

Virtual ham radio experience with CW contacts.

Visit →

Morse Invaders

Classic arcade game controlled by Morse code.

Play →

Vail Training Tools

Learn letters, numbers, and build speed.

Visit →

Morse Battleship

Play battleship using Morse code commands.

Play →

CW Checker

Real-time decoder to verify your sending accuracy.

Visit →

Morse ATC

Air traffic control game using Morse code.

Play →

Morse-it iOS

Practice Morse code on your iPhone or iPad.

Get →

Join the Vail Community

100% open source. Build your own or get support from fellow enthusiasts.