For CW Enthusiasts

The Ultimate Morse Code Interface

The Vail Adapter is the perfect bridge between traditional Morse code keys and modern computers, featuring zero-delay sidetone and multiple operating modes.

Get Yours Now GitHub

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.

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Zero-Delay Sidetone

Built-in piezo speaker provides immediate audio feedback, eliminating the annoying delay you get with computer-generated sidetone.

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Dual-Mode Operation

Works in both MIDI and Keyboard Emulation modes, making it compatible with VBand, Vail website, Morse Invader, and other CW training tools.

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Universal Compatibility

Compatible with all key types: Straight Keys, Bugs, Cooties, and Iambic Paddles - they all work flawlessly with the Vail Adapter.

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New Practice Oscillator

The latest update adds a standalone practice oscillator mode. Just connect to any USB power source to practice anywhere, without a computer.

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Keyboard Mode Sidetone

Now enjoy local sidetone even in keyboard mode, allowing you to mute website audio and still hear your sending with zero delay.

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Elegant Design

A purpose-designed PCB in a 3D printed enclosure creates a tidy, professional solution for your Morse code interface needs.

Get Your Vail Adapter

Choose the option that works best for you, whether you want to build it completely from scratch or get a ready-made solution.

Choose Your Option:

Option 1: Build It Yourself

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

Required Components:

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

Setup Instructions:

Easy Setup Guide

Advanced Setup Guide

GitHub Project

Option 2: Order PCB Version

Get a professional PCB version with custom enclosure for a tidier solution.

Vail Adapter PCB View Adapter Options

Latest Updates

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

May 2025

Practice Oscillator Mode Added

New standalone practice oscillator mode allows you to practice Morse code anywhere with just a USB power source. Perfect for practice sessions when you don't have access to a computer or internet.

May 2025

Keyboard Mode Sidetone Support

The Vail Adapter now provides local sidetone feedback even when operating in keyboard emulation mode. This means you can mute website audio on VBand, Morse Invaders, or Morse it iOS app and still hear your sending with zero delay.

Update Available

Existing Users Can Upgrade

If you already own a Vail Adapter and would like to update to the latest firmware with these new features, please see our update instructions below.

How to Update Your Vail Adapter

Updating to the latest firmware is simple and takes just a few minutes.

Update Instructions

  1. Put your QT Py or XIAO Arduino into boot mode so it appears as a storage drive on your computer
  2. Download the appropriate .uf2 file from GitHub Releases
  3. Drag the .uf2 file to the storage drive
  4. Wait approximately 30 seconds for the update to complete
  5. Unplug the device and plug it back in

Need help or having issues? Email ke9bos@pigletradio.org for troubleshooting assistance.

Resources to Use with Your Vail Adapter

Your Vail Adapter works with a variety of websites and apps that help you practice, improve, and enjoy Morse code.

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Vail Server

Change settings on your adapter, have QSOs with others online, practice copying fortunes, or listen to yourself with the Echo feature.

Visit Vail Server →
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VBand Server

Have QSOs with others online or join a group CW party in this popular online Morse code community.

Visit VBand →
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Morse Invaders

Highly addictive game to practice your sending and protect the city from falling words. Perfect for building speed and accuracy.

Play Morse Invaders →
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RF Keeper

Practice sending words with your Vail adapter or practice copying QSOs, states, and callsigns to improve your skills.

Visit RF Keeper →
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Morse Code Battleship

Try to target your enemy turrets before they get yours in this fun Morse code version of the classic game.

Play Battleship →
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Morse Code Checker

This tool analyzes how good your Morse code sending is by measuring the ratio of your dits and dahs as well as spacing. Also excellent for tuning a bug!

Check Your CW →
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Morse ATC

Try your hand at air traffic control with Morse code in this unique simulation game.

Play Morse ATC →
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Morse-it iOS App

A comprehensive Morse code app for iPad and iPhone that works perfectly with your Vail adapter.

Get Morse-it →