I'm not familiar with your particular drawing package, but it will almost certainly have a linear pattern function. So draw one hole in the right place in a corner then pattern it across horizontally so that it slightly more than fills the width of the object your drawing. Then delete the...

Sorry, I was somehow confused and assumed the comparison was SR009 which, if I remember correctly is the nearest Stax equivalent to you devices - and which, of course has a metal stack construction. Looking back over your original post I see that you clearly said 007, so my fault for making...

Are you sure that you are not being fooled by the fact that your stack is glassfibre board while the Stax stack is metal? I would expect them to sound a lot different when the edge is tapped on a hard surface. Have you actually tested the resonant frequencies of the respective diaphragms? Ed Form

Electrostatic loudspeakers are very simple objects but some physical differences make the top electrostatic headphones sound better than lesser models. The route I'm taking reflects my ideas, not just on what those advantages are, but also on what else can be exploited to go beyond the current...

It won't really help if the adhesive is non-conductive, it has to partly enter the weave in order to wet sufficient surface area to form a bond, and finding an adhesive with suitable rheology to flow just the required amount, then working out how to apply a precise amount in the right places, is...

Practical realities. Having now had various components manufactured, unexpected practical realities have begun to intrude and I've spent recent weeks altering my design to control costs and make production a practical reality. The driving difficulty has been bonding components together with...

Good news. Ed Form

Taking this forum to be an educational facility in which citations from technical papers are appropriate [tongue firmly in cheek here] , it seems reasonable to publish the paper's conclusions... ********************************** This paper develops an improved model of the high audio-frequency...

Soldering to aluminium is a well developed process, but it isn't always terribly reliable. It's one of the reasons that copper-coated aluminium wire is used in loudspeaker voice coils - it's a doddle to solder. Ed Form

Someone has been very naughty with amplifier output on the poor set of 009s in that last image - they have been arcing all the way to the repair shop. I'm not sure where you got the images jgazal, but they're very revealing. Thanks for posting them. I'm amazed that the inside surface of the...

1. The perforated part of the stator is very thin which is good. 2. The edges of the holes in the perforated part have been post-etched, which I think means they have been radiused chemically like the square holes this drawing... This will diminish the influence of tube-end effects which tend...

I didn't say it would not affect the sound, I said I couldn't see a sound quality benefit. I hadn't thought about heat generation and will have to measure what sort of temperature rises occur. Not sure what you mean here. Ed Form

1. The air in the holes is a mass bouncing on the spring of the air between the diaphragm and the inside of the plate; it constitutes a low pass filter with resonant misbehaviour of the comb filter type. Worst case is small holes in a thick plate, bigger holes are better, thinner plate is...

The construction of the 009 stators is pretty complex - careful examination of the edge of the inner aperture suggests there are three layers - a perforated disk and two stacked spiders - and the parts are diffusion brazed. On inspection, the metal thickness of the perforated plate appears to be...

Why not use a non-conductor? You can get Mylar/Melinex in thicker sheet and I think it will laser cut, although it would probably be cheaper to talk to a company that does click-cutting and have a steel-rule tool made. I'd be surprised if you couldn't find someone to make you the tool for less...