Battery-powered, Leslie Style Amp Made From a Globe

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About: i am an artist and musician. i make things of use out of things that no longer have use. i think the hip term is "upcycling." i post a lot of inspirational and entertainment videos on youtube.com/timsway. oc...

Battery powered amps are inexpensive and easy to make, so when I made one, I decided to put my own (sorry) "spin" on it. I built it in a globe so I could manually spin the speaker, creating a phasing, "Leslie" effect. You can watch this video which shows how I did it or read the following Instructable. You can also see a performance video of the speaker in action here:

Thanks and be good,

Tim

Step 1: Parts and Such

I bought the amp electronics on Ebay for about $25. I used a 3.5" speaker out of an old radio and a Soviet-era globe. First I needed to remove the speaker and get the globe off it's little base, so I could build a larger, wood base to house the electronics.

The pin that the globe spins on was solid, so I bought a small, hollow steel split ferrule I was able to hammer in the hole, allowing wires to snake up through the post and into the speaker.

Yes, the wires do twist a bit as I spin, but inside the globe and ferrule. I left the wires extra long to allow for this and spin the globe in opposite directions each time I turn it to unwind the previous wind.

Step 2: Mount the Speaker

I drilled a hole in the globe oversized for the speaker so I could mount the speaker in to the waste part of the cut, then create a mounting system to put the speaker back in. I used some seatbelt material and epoxy but it is kind of ugly. I would come up with something better if I did this again.

YES I KNOW it looks like the Death Star. But I chose to keep it as a globe. Life over death, y'know?

Step 3: Build a Box

I used reclaimed oak and mahogany to build a slightly complicated tapered box. the math was nutty and it required some trial and error to get it to fit right. You can make a regular box instead. I drilled holes for the knobs and jack.

Step 4: Plug-n-play

I mounted the pre-wired electronics in the box, connected the speaker and that's it! Watch the video(s) to see and hear it in action. If I were to try to one up this again, I would use some small electric motor to spin the globe controlled by a foot-activated rheostat :)

-Tim

Epilog Contest 8

Participated in the
Epilog Contest 8

Amps and Speakers Contest 2016

Participated in the
Amps and Speakers Contest 2016

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    7 Discussions

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    ILykMakin

    8 months ago

    I didn't see how you addressed the turning of the globe not twisting the speaker leads right up- unless your plan is just to have it move back and forth thru that short arc. Suggestion: Slice the globe around the equator, you can mount your speaker much more cleanly and it allows to to glue in an equal weight on the opposite side of the globe in the southern hemisphere, so you can really spin it up!

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    rebeltaz

    2 years ago

    I was going to say paint it grey with some details and you've got a Deathstar, but it looks like ithers have beat me to it!

    1 reply
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    timswayrebeltaz

    Reply 2 years ago

    i put it right in the description, i chose positive earth over negative death star, but I do (secretly) agree - a death star guitar amp is way cooler :)

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    timswaydufus2506

    Reply 2 years ago

    ha ha! I know, I know! next one :)

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    Cdn Sapper

    2 years ago

    My first thought from the thumbnail was Deathstar from a globe. That might make a really cool next project...Deathstar amp!

    1 reply
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    timswayCdn Sapper

    Reply 2 years ago

    I know it was SO tempting, but I chose positive over negative in the end. The Rebels win! :) thanks man.