Steven Marks Tube Power Supply

[BEP]

Put a football shaped neo mag on an inside edge. The mag field will treat the neo like speaker cone. Don't touch when it is vibrating.

--giantkiller.

Thanks for the suggestion. The construction of this one includes magnets already. At two points around the circumference (90 and 270) I have a two magnet set.

They are the same magnets shown on the open TPU. One above and one below. They are there to provide a static node in the torsion/stretch of the core using magnetostriction. They don't vibrate unless the multivibrator is off tune. When tuning is best the core vibrates and not the magnets.

Without the circuit the whole thing is the most poorly designed speaker in existence.

Fun to play the long version of "Innagoddadavida" but not much else.

[Grumpy]

you can make something vibrate by constantly changing the electrical gradient around it