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Old 01-12-2019, 11:13 AM   #1 (permalink)
 
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Default Tunable 21 Tone Kalimba, ceramics/wood...

A dear African drummer/percussionist friend with a broad interest in world music requested a tunable Kalimba, so I obliged.

Steps:
Throw top ring and bottom bowl separately and precisely out of Toki Vanilla cone 6 clay on a potter's wheel.
Dry top ring and bowl until leather hard, then score, slip, and join by interposing a coil of soft clay.
Bisque fire it when bone dry.
Underglaze with airbrush (outside) and handbrush, then glaze, then final fire at cone 6.
Cut 21 hole electricians ground bar, rosewood bridge, and cherry wood sound board to size; then epoxy them together and then onto the ceramic unit.
Cut 21 equal lengths of (Greenlee 438-2X) spring steel fish tape, finishing the ends so they are comfortable.
Insert, tighten, and tune the tone tines (long = lower pitch, short = higher pitch).
This one is tuned to a Javanese (full pelog equal temperament 7 tone Gamelan-type) scale on the left, and a Western chromatic scale on the right.
Sounds good acoustically, or with a piezo pickup.



Fun little project.

If I had a larger lathe, I'd make the base/resonating chamber out of wood - or might scroll saw a bunch of rings and save some wood - hmmm... - sort of like I did for the Dizzy Gillespie wireless ceramophone (link below) - only different...
Commissioned Dizzy Gillespie Ceramophone

Happy Saturday to all - Bob

Last edited by Bob in SF; 01-12-2019 at 11:16 AM.
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Old 01-12-2019, 11:18 AM   #2 (permalink)
 
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Bob: Outstanding great work again!!!
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Old 01-12-2019, 11:50 AM   #3 (permalink)
 
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Way cool! love the use of the ground bus. Hopefully an electrician is not looking for his fish tape.
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Old 01-12-2019, 08:58 PM   #4 (permalink)
 
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Wow, that is very awesome there Bob! Nice work!
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My Original Music
https://www.youtube.com/channel/UCVo...zlEDqtFtPNYTkQ
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Old 01-13-2019, 12:33 AM   #5 (permalink)
 
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Amazing Bob
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Old 01-13-2019, 08:46 AM   #6 (permalink)
 
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Way cool instrument. You've done it again!
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Old 01-13-2019, 09:14 AM   #7 (permalink)
 
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That is very cool and creative. I would love to hear a short audio of it being played. Your work is amazing.

If you don’t mind, I would like to note one little nitpicking observation. This might be just a personal preference but the green screws on the ground bar seem to detract from the overall appearance and I was wondering if they could be swapped out.
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Old 01-13-2019, 09:50 AM   #8 (permalink)
 
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Beautiful work Bob. Is there anything you can't do?
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Old 01-13-2019, 10:52 AM   #9 (permalink)
 
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Many thanks Charlie, Greg, Bobby, Cindy, Art, and Cody!

Cody - Good suggestion about swapping out the ground bar screws - I'll look into it next time around.

I don't know how to upload an audio sample on this site without posting it elsewhere - wondering if I can attach an MP3 file as a .zip.

Best regards to all - Bob
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Old 01-13-2019, 10:57 AM   #10 (permalink)
 
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Thanks, Tom!
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