Code Practice Oscillator
1. Built-in key and external key jack.
2. Pleasant sine wave tone.
3. Built-in audio amp and speaker.
4. On board 9 volt battery holder.
5. One evening build time.
A code practice oscillator is a must for learning to send and receive Morse code. Our CPO includes a built-in key to get you started (you should start learning with a key until you can send and receive 8 to 10 words per minute).
This CPO uses a Twin-Tee oscillator which produces a pure sine wave audio tone. Many other designs use square wave oscillators which are not as comfortable to listen to.