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Building an Electrostatic Speaker
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beun



Joined: 28 Jun 2006
Posts: 676



PostLink    Posted: Sun Jan 01, 2012 9:02 pm    Post subject: Reply with quote


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Just wanted to wish everyone a happy new year and a quick update on the status. All remaining parts are ordered and on their way, the crate is progressing and I optimistically expect to be able to ship in two weeks

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ESL-0.5 Full Range Electrostatic Loudspeakers | RTC2200 Component to VGA Converter with Gamma Boost
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beun



Joined: 28 Jun 2006
Posts: 676



PostLink    Posted: Mon Jan 02, 2012 3:17 am    Post subject: Reply with quote

I made some pictures as they would appear in a brochure.


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beun



Joined: 28 Jun 2006
Posts: 676



PostLink    Posted: Mon Jan 02, 2012 11:57 pm    Post subject: Reply with quote

And a few more






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Spanky Ham



Joined: 22 Mar 2006
Posts: 5607
Location: Comedy Central


PostLink    Posted: Tue Jan 03, 2012 12:28 am    Post subject: Reply with quote

Very nice and they look good in that room.
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beun



Joined: 28 Jun 2006
Posts: 676



PostLink    Posted: Tue Jan 03, 2012 2:53 am    Post subject: Reply with quote

You don't want to know how much furniture we had to move around in order to make that picture.
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ESL-0.5 Full Range Electrostatic Loudspeakers | RTC2200 Component to VGA Converter with Gamma Boost
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Tom.W



Joined: 09 Mar 2006
Posts: 6637



PostLink    Posted: Tue Jan 03, 2012 6:22 am    Post subject: Reply with quote

Those are some beautiful speakers !!!
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ecrabb
Forum Moderator


Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010


PostLink    Posted: Tue Jan 03, 2012 7:33 am    Post subject: Reply with quote

Gorgeous. Beautiful work, Kim.

SC
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Spanky Ham



Joined: 22 Mar 2006
Posts: 5607
Location: Comedy Central


PostLink    Posted: Tue Jan 03, 2012 2:56 pm    Post subject: Reply with quote

If you took those to Cedia next year, then you could easily sell a couple of dozen.
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garyfritz



Joined: 08 Apr 2006
Posts: 10212
Location: Fort Collins, CO


PostLink    Posted: Wed Jan 04, 2012 3:04 am    Post subject: Reply with quote

But it would take him 10 years to make them....... Laughing Mr. Green Laughing
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beun



Joined: 28 Jun 2006
Posts: 676



PostLink    Posted: Fri Jan 06, 2012 12:27 am    Post subject: Reply with quote

Wouldn't be that bad if I make identical ones
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beun



Joined: 28 Jun 2006
Posts: 676



PostLink    Posted: Fri Jan 06, 2012 12:30 am    Post subject: Reply with quote

I took the time to compile a list of materials and vendors. If anyone has some additional questions I will update the document. I also have to post the new version of the variable HV-supply. I had to make some changes because of some undocumented 'features' in the amplifier IC.

http://rfic-consulting.com/ESL/Electrostatic_speaker_parts_vendors.doc

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Boilermaker



Joined: 21 May 2006
Posts: 527



PostLink    Posted: Sat Jan 14, 2012 7:49 pm    Post subject: Reply with quote

Kim,

I want to thank you for sharing all this with us including all the details and pictures!

Believe it or not, it has been a nostalgic trip for. I recall as a youth taking the bus to downtown Pittsburgh to visit a high end audio emporium that had a pair of KLH 9's driven by the big Mac tube monoblocks. The guy that owned the store didn't mind me just sitting and listening. I will never forget the sound - There is nothing quite like a full range 'stat.

Years later, I came very close to building a pair of the David Hermeyer direct drive 'stats that you might have heard about in ancient history research.

Again, many thanks for taking me back on a pleasant voyage.

BTW, I did end up spending a number of years with a pair of Dayton-Wright XG8's, if you have ever heard of them.


Bob
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beun



Joined: 28 Jun 2006
Posts: 676



PostLink    Posted: Sun Jan 15, 2012 1:58 am    Post subject: Reply with quote

Bob,

Thanks for your story, I have never heard of David Hermeyer (I need to look him up) but I do know about the Dayton-Wrights.

But there is more... Laughing

I have progressed with the crate and should be ready to package soon, see a picture below.



I also have one of the interface boxed finished and the other one is in progress



I will post a few better pictures when they are finished, I have some nicer looking hardware on order.

I also weighted these puppies, they are about 120lbs/55kg each. The crate weighs even more and it isn't even finished yet.

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beun



Joined: 28 Jun 2006
Posts: 676



PostLink    Posted: Thu Jan 19, 2012 3:16 am    Post subject: Reply with quote

Finished both interface boxes, here is how it looks


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HK-Steve



Joined: 15 Jul 2006
Posts: 849
Location: Switzerland

TV/Projector: Marquee 9500, Epson 8100


PostLink    Posted: Thu Jan 19, 2012 7:11 am    Post subject: Reply with quote

Sweet. Congrats.

That crate must weigh a lot, but super secure for those precious babies.

Cheers

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beun



Joined: 28 Jun 2006
Posts: 676



PostLink    Posted: Thu Jan 19, 2012 7:20 am    Post subject: Reply with quote

Yep, my estimate is between 350 and 400lbs total, crate and speakers.
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HK-Steve



Joined: 15 Jul 2006
Posts: 849
Location: Switzerland

TV/Projector: Marquee 9500, Epson 8100


PostLink    Posted: Thu Jan 19, 2012 1:45 pm    Post subject: Reply with quote

I am sure there will be a tear in your eyes, when they leave Sad

And a huge Yipppeeee from your wife, ha ha.


Cheers

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Boilermaker



Joined: 21 May 2006
Posts: 527



PostLink    Posted: Mon Jan 30, 2012 7:41 pm    Post subject: Reply with quote

Kim,

I have been "daydreaming" about redoing my HT setup in a separate room in my basement. One of the ideas I was toying with, so I could utilize a pair of your 'stats of an extra large size, was to install them both in a wall that separates the HT from the rest of the basement.

In this configuration, they would no longer be bipolar as the backwave would get lost in what can be considered an infinite baffle. This way, the back wave would no longer cancel out the front wave as you are aware. It has been a while since I had a 'stat, so I can't remember, but what is the frequency at which this cancellation begins? Is it 1/2 wavelength of the width? Also, is this response dropoff at single pole or double pole?

Hopefully I can turn this dream into reality because I really like what you have done, and really want to have them.


Thanks,
Bob
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Nashou66



Joined: 12 Jan 2007
Posts: 16165
Location: West Seneca NY


PostLink    Posted: Mon Jan 30, 2012 8:06 pm    Post subject: Reply with quote

Bob step away from the computer and take deep deep breaths!!!

Relax big fella relax!!!

Very Happy

Nashou

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Boilermaker



Joined: 21 May 2006
Posts: 527



PostLink    Posted: Mon Jan 30, 2012 8:23 pm    Post subject: Reply with quote

Quote:
Bob step away from the computer and take deep deep breaths!!!

Relax big fella relax!!!



Nash - Have you ever heard a full range electrostat?
When you do, you will be hyperventilating!!!
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