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Old 11th August 2010, 01:54 AM   #5621
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Quote:
Originally Posted by Joachim Gerhard View Post
Stig Björge of Lyra has one of those amps perfectly restored so i can ask him hpw it compares today.
John, was that the Corona Wind speaker ?
I heard that his strain gauge cartridge was also ahead of it´s time.
i heard he misteriously disappeared one day.
The Corona Wind was Gerald Shirley, whom I met... and saw the original (not functional at the time). I worked at the same place as his son back then, so he took me over to meet him...

_-_-bear

PS. I would love to see the schematic of that amp...?
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Old 11th August 2010, 03:01 AM   #5622
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Originally Posted by john curl View Post
This business of NEVER believing in anything outside one's simple world of knowledge is very disappointing and compromises others who have a greater design experience than you have.
Scott? Scott Wurcer? The guy whose designs sell more in a day than you've sold in a lifetime?

The irony of this floors me.
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Old 11th August 2010, 03:02 AM   #5623
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Yes, Johnferrier it is that Pattent. It contains other solutions that are aimed to make the amount of bass adjustable and the same time optimising the image. In a nutshell the midrange-treble and bass panel are rotatable against each other so it is modular. One of the drawing i send to the pattent office had a measurement of the phantom image. Imagine a bundeling ELS where you sit on the 90° canceling axis and listen only to the reflexion. I heard about the Iverson speaker but do not know how it worked. There was a report online that Nelson Pass landed in holpital after showing a corona wind wideband on a trade show so Scott you are right. It is a heath hazzard. I heard of the Ostromov Ion speaker that seems to have solved that. The Hill speaker used a cloud of Helium to avoid ozone. i build a version of my phantom source with an ESL panel and people got totally shocked when the heard it. Maybe sometime i will show it in public. The effect is impressive.
I will prepare a little scetch.
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Old 11th August 2010, 03:08 AM   #5624
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Default Phnatom Source

Here it is.
Attached Files
File Type: pdf Phantom Source.pdf (31.3 KB, 79 views)
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Old 11th August 2010, 03:29 AM   #5625
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Quote:
Originally Posted by Joachim Gerhard View Post
so i find Iversons work very interesting.
Quote:
Originally Posted by johnferrier View Post

You have known about Iversons work?
Aren't Russell Sherwood and Matthew Bertram carrying on where Mr Iverson left off? Eagle audio is it?
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Old 11th August 2010, 03:46 AM   #5626
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Yes, those are the ones that restored Stigs amp.
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Old 11th August 2010, 03:54 AM   #5627
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SY, what does that have to do with it? What have YOU sold in the audio industry? If that is what makes one qualified to speak about their colleagues, where is your experience with the making of audio products?
What I am concerned with is the general criticism, without even knowing the person, of people in the audio industry, many of whom I have met and even worked with.
John Iverson was a great circuit designer. I don't say that lightly. However, he WAS eccentric. So was Tesla, and he got much the same treatment, until recent years.
Some people INVENT new ideas, others implement the ideas that have been invented, and work better in corporate culture. I am NOT one of those people, and neither was John Iverson. He worked better, self employed or as a consultant, just like me.
From my experience over decades, excellent circuit design does not take a college degree, but it does take some fundamental instinct as to how circuits work, and this is a rare gift. John Iverson had this gift, and I can count the number of people that I have met in my live experience on one hand with the same ability.
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Old 11th August 2010, 06:33 AM   #5628
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Quote:
Originally Posted by thanh1973 View Post
Would that be lauched from a Naval vessel or from land?
SAM = Surface to Air Missile

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Old 11th August 2010, 06:35 AM   #5629
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Good morning Jan. I hope you had a good rest. It´s good to have people like you for our safety.
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Old 11th August 2010, 06:37 AM   #5630
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Here it is.
Joachim what was the freq range where this effect can be used? Wouldn't you lose directivity (and beaming) at low freqs?

jd
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