Electrostatic headphones with magnet tension system project

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Although there's a specialized site with way more headphones projects than Diyaudio, i thought to present my project here step by step.
Most of the electrostatic headphones are based on using mylar or polyester + soluble elvamide while my idea was to use usual cellophane or flowers (food) wrapping plastic that you can find at any shop . The advantage is that it's much easier to find and it is naturally conductive(about 1000 mega ohms at normal humidity levels in my room) .There are of course some disadvantages too, but i will address them one at a time.

A friend of mine printed a few enclosures with different depth of the channel where i can place the magnets used to tension and electrically bias the foil as i thought of using a faster way to check different types of material with this magnet system.
I needed to cut a thin pcb ring(0.5mm) which should be placed into the carved channels for the magnet system to keep all the magnets connected to the bias voltage.


More on this Keith Snook used something like it in his project, although he used different types of naturally conductive materials than cellophane:
http://www.keith-snook.info/wireless-world-magazine/Wireless-World-1971/Electrostatic%20Headphone%20Design.pdf
http://www.keith-snook.info/wireles...World-1971/Electrostatic Headphone Design.pdf
 

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