When I said the IKEA didn't need to be tuned, I meant it didn't need to be sanded to be tuned that way. It can be electronically tuned in lieu of sanding it to tune it. The tubes need to be tuned to resonate at 50 Hz in EU & 60 Hz in USA. The tubes are connected to direct current while the ring or plate is connected to neutral.
All the data you seek is covered in this thread.
P.S.: Unless you have a way to tune the IKEA electronically, it might not be the right device for you to replicate. The beer can device would probably be a much better place to start. It's tuned by sanding the can until it resonates at the required frequency.
Originally posted by grizli
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, also I would like to share more but I think people with the cash will steal it from us. 
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