Help with DIY electrostat's

[ak_47_boy]

Sweet that will last me a day or two
I just have one more quick question that i am kind of stuck on, i am the kind of person that can't just know it works i have to know how it works. What does the audio transformer output? Does it just step up the input? What comes out each stator wire that makes the membrain move? Like change in polarity? I heard mention of AC? Is it time between pulses or what? I am confused a bit i dont understand how a transformer can do that.

[v-bro]

Voltage is increased in the transformer, fed into the "large capacitor"(as an electrostatic panel in fact is) creates an electrostaic load (like wiping a comb on your wool sweater and being able to pick up a piece of paper).

The load should be maintained by inputting a steady 1.5 Kv or higher.
This is where the supply comes in.
The musical signal is merely "added" on top of the existing 1.5 Kv.
The allready existing load is moved back and forth causing the membrane to move accordingly....

[ak_47_boy]

Ok so one stator would be 1580V and the other 1500 and the panel would move?

[I_Forgot]

The center tap of the audio transformer is the reference point in the speaker. Think of it as 0V. One stator will momentarily be at +1500V and the other at -1500V. The diaphragm is charged to -1500VDC. The diaphragm will be repelled by the stator at -1500V and attracted toward the +1500V side. The voltages on the stators will be constantly changing in amplitude and polarity (that's why it's called AC) and moving the diaphragm back and forth to produce sound.

The diaphragm will only move so far then stop; when the force produced by the electric field is equal and opposite the spring force due to the tension on the diaphragm. The greater the amplitude, the greater the deflection until the diaphragm can go no further and slaps against a stator.

I_F

[v-bro]

How quick it slaps onto the stator depends much on the insolation material. The insulation is not only there to prevent sparkles, nylon coated stators are said to give more linear membrane movement. (progressive movent would encourage the membrane to hit the stators much quicker...).

I will search for the article I got this info from, hope I can still find it....

[ak_47_boy]

Ok so when music plays the stator charge graphed would look like a sine wave. The peeks would vary depending on volume and the distance between peeks would be frequency. I think i understand good now.

[v-bro]

I think you should look at what this guy did :..didn't know how they sound till i made me one..

[moray james]

buy yourself a used set of Acoustats and you will have everything you neet to start experimenting for very little outlay. They have wire stators so you can jump right into playing with delay lines. 0ne plus one's and model two's can be had for $300 - 500 dollars Cnd.

[v-bro]

They sure look good!

Here's a link of them with nice pictures:
http://www.justrealmusic.com/content/acoustat.htm