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Old 27th August 2010, 02:00 PM   #11
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Hi Calvin,

Your equations and explanations are too technical. I, for one, don't understand them. If you could, please recommend an ideal steel sheet thickness and hole size.

Wachara C.
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Old 27th August 2010, 02:24 PM   #12
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I just called the metal store. They will order a sheet of 16 gauge perf metal with 0.1875" holes on 0.25" centers. Thats' a 51% opening. Sounds ideal yes?
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Old 27th August 2010, 02:52 PM   #13
Calvin is offline Calvin  Germany
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Hi,

maybe RV5/6 in 1.5mm-1.0mm or RV3/4 in 1.0-0.8mm or maybe not?


jauu
Calvin
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Old 27th August 2010, 02:57 PM   #14
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Quote:
Originally Posted by Calvin View Post
Hi,

RV5/6 in 1.5mm-1.0mm or RV3/4 in 1.0-0.8mm


jauu
Calvin
Calvin,
Sorry, I don't understand what these numbers mean. Is this a European gauge system?
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Old 27th August 2010, 03:31 PM   #15
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Freddy, go for the 51%, it's perfect....
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Old 27th August 2010, 03:46 PM   #16
Calvin is offline Calvin  Germany
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Hi,

its a german terminology in the MKS-system

RV: Round holes Versetzt, staggered rows
5/6: hole diameter/distance of hole centers in mm.

jauu
Calvin
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Old 27th August 2010, 04:24 PM   #17
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Quote:
Originally Posted by Calvin View Post
Hi,

its a german terminology in the MKS-system

RV: Round holes Versetzt, staggered rows
5/6: hole diameter/distance of hole centers in mm.

jauu
Calvin
Ah OK, smart! Simple and direct terminology

Jonas, your avatar is freaking me out...LOL, I see it out of the corner of my eye and just about swat my screen.
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Old 27th August 2010, 06:10 PM   #18
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Quote:
Originally Posted by Calvin View Post
Hi,

its a german terminology in the MKS-system

RV: Round holes Versetzt, staggered rows
5/6: hole diameter/distance of hole centers in mm.

jauu
Calvin
Thanks Calvin! That's pretty clear now.
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Old 27th August 2010, 08:55 PM   #19
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What is the effect of the diaphragm's thickness? I see 6 micron film from TAC and also 3 micron on ebay. Is it simply a matter of thinner is better because of less mass up to a certain point where structural integrity gets compromised? In other words, if it's too thin then it could break too easily?
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Old 28th August 2010, 04:56 AM   #20
mavric is offline mavric  United States
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Default kindly check this

Quote:
Originally Posted by Freddy G View Post
Hi Everyone!
I'm going to build a pair of hybrid ESL speakers. I went to my local metal supermarket today and they have two types of perforated steel sheets.
The first one is a 16 gauge with 0.125" holes staggered on 3/16" centers. It has a 40% opening area.
The other sheet is 18 gauge and has 0.156" holes. It has a 63% opening area.
Will either of these be suitable? Or should I try for something more ideal from somewhere else?

Kindly check this thread on page six, "start to finish esl" by mavric. I had alot and i mean alot of help here. CharlieM, Gerald, Chinsettawong,Calvin, and many others. I took alot of pictures and tried my best to show details and where the material came from., CharlieM has a blog page that will save you alot of time and money on the electronics and engineering, he helped me through the whole thing hands on.
>mine are 51% open area
>1/16 perf steel, .171 holes i believe
>panels are 16" by 40"
>tl is a pretty neat desighn, check out the pics, there is a diagram for the build, 8" carbon fiber driver per panel.
>The system is by amped, one amp runs one esl and sub.
>Diaghphram came from some place CharlieM allready had and i cannot remember. but it .0005 micron, coated with Licron Tec Spray part #1756-8S(techspray.com).
I am using a crossover as impiedence drops sharply with esl's, so i went hybrid.
I hope this helps, my amps are only 100rms per channel, and I am so happy with this as it was my first build.
I am not a very technical person, so please check my post, a picture is worth a thousand words. page 6, start to finish esl, Mavric.
good luck, your gonna love it.
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Last edited by mavric; 28th August 2010 at 05:14 AM. Reason: i did not post anything, hit wrong button
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