Wire stator spacing guidelines?

[bigwill]

Quick question - What is the ideal spacing for wire stators on ESLs? Is 13mm too wide?

[pikkujöpö]

I have also interest to know the answer for what you are asking.


What is the wire diameter you are going to use ? user name Capaciti has mentioned something about this matter,in one of his posts.Can't find it now.

From what I have looked others projects,13mm seems huge.You are talking about the distance between the wires,right.

[moray james]

many stats strive to have 45 to 50 % open area. The rational is to have an acoustically transparent stator. I think that to fully control a diaphragm additional damping is required. Acoustical stator resistance will help to control your skins. My guess is that 30 to 35 % open stators will help to control the diaphragm and probably sound better than a 45 to 50 % open area stator will.

[Silberlot]

Hell
with my wire Stator is the opening between the
wires 2 mm = high stream density between the wires and high effekt

look here

[bigwill]

How about a 6mm square mesh? (0.6mm wires)

[moray james]

roughly 5.5 wires per inch on a 1/2 in open square louvre made of styrene. These are reasonably efficient panels so you can judge from there. Acoustat used heavy build PVC insulation around 24 gage wire. Open area would be about 40% (estimate). If you double your wires per inch you should double your static field density which should yield a 3 db increase in efficiency.
Superior Essex 30 gage heavy build magnet wire will take about 12 Kv. This is inexpensive works very well and it is easy to work with. Nice part is you have a tested and consistant insulation.

[bigwill]

Thanks for all replies so far

What happens when you don't insulate your stators? (apart from the obvious stafey hazard)

Can the membrane get destroyed?

Also: Even if you have say half the wire density, is efficiency really lost? The capacitance would be halfed so half the current would be needed to charge them?

[moray james]

in order to have a safe and efficient panel. Given the amount of work involved to build a panel why would you not choose to use insulated stators? Insulated wire is cheap and easy to obtain.
Uninsulated stator ESL speakers will work but you cannot use as high bias charge in the diaphragm so you will have lower efficiency.
The fewer wires that you use the lower the efficiency. You want to use as much bias as is reasonable to help keep the output of the panel as high as possible.
This has all been discussed in the past and if you do some searching you will find everything that you need to know. Perhaps you might consider a kit to eliminate the need to reinvent the wheel. That would save a lot of time and effort on your part and get you into a working set of panels. you might also look into a used set of ESL's to play with. I don't know how many Acoustats there are on your side of the pond but they are worth looking for and work well. You could fashion a new set of panels for them and have fine new speakers. Use 3 - 6 micron polyester for your new diaphragms and enjoy.

[moray james]

there is a lot of great information. Insulated vs. bare metal stators
Sounds like the Capacity panels are excellent and reasonable in price and there is a company in Australia that sells ESL panels and kits. lots of options. Calvin has posted lots of excellent threads on ESL step up options for little money as well as info on panel construction. The archives are filled with enough info for you to build a state of the art panel. Dig in.

[bigwill]

Does having wires going horizontally as well as vertically make a difference?