Phone Horn Passive Amplifier

11,862

132

2

Introduction: Phone Horn Passive Amplifier

About: I love the design and ambition of vintage technology, and the usability and potential of new - my passion is bringing the two together.

I've seen a few of these projects online lately and really wanted to have a go myself - got my opportunity this week when I picked up an old decorative bugle for £1 at the car boot.

It only took an hour or two to complete, and made for an excellent evening's tinkering.

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: Horn Trimming

I had a rough idea of the shape I wanted, so set about chopping down the horn, using my all-time favourite tool a copper pipe cutter, the kind you keep tightening and rotating, like in the opening credits for Cool Hand Luke but on a smaller scale.

Step 2: Wooden Base

I happened to have handy a wooden menu holder ideally shaped to hold the horn at the right height for my phone's speaker. I drilled through and then snugly fitted the horn in place.

Step 3: Final Tweaks

With the pipe fitted through the drill-hole all that remained was to cut it to the right length, so that the phone would lie comfortably against the wood with the speaker flush with the end of the pipe. I needed to file the pipe mouth at an angle to make the fit perfect.

It looks great with or without the phone, and works a treat. Looking out for something bigger for the next one!

Be the First to Share

    Recommendations

    • Trash to Treasure Contest

      Trash to Treasure Contest
    • Raspberry Pi Contest 2020

      Raspberry Pi Contest 2020
    • Wearables Contest

      Wearables Contest

    2 Discussions

    0
    BLUEBERRY35
    BLUEBERRY35

    6 years ago on Introduction

    GREAT IDEA,my wife is partialli deaf,im going to make one.
    Thnx man