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Audio builder from the Midwest saying hello to the Circle.

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Tritium

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Audio builder from the Midwest saying hello to the Circle.
« on: 22 Jun 2020, 07:43 pm »

Hello from the middle of the USA.
Have designed and built Preamplifiers, Amplifiers, Speakers, Crossovers, Mixers, Compressors and cables

As always seeing and listening to what others are building is fascinating.
Great music brings inspiration.
I fail as many time as succeeding, A never ending journey of self relization.
Tubes, Transistors, Transformers, Planar, Horn, Electrostatic, Ribbons.
Nothing is off limits.
The only limit is imagination, When that runs out I come here.
Thanks for listening.
Roy
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FullRangeMan

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  • To whom more was given more will be required.
    • Never go to a psychiatrist, adopt a straycat or dog. On the street they live only two years average.
Re: Audio builder from the Midwest saying hello to the Circle.
« Reply #1 on: 22 Jun 2020, 10:25 pm »
Welcome Roy :thumb:
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Phil A

Re: Audio builder from the Midwest saying hello to the Circle.
« Reply #2 on: 22 Jun 2020, 10:46 pm »
Welcome!
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ArthurDent

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Re: Audio builder from the Midwest saying hello to the Circle.
« Reply #3 on: 22 Jun 2020, 11:12 pm »
Greetings & Welcome to AC Roy   :thumb:
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Jazzman53

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Re: Audio builder from the Midwest saying hello to the Circle.
« Reply #4 on: 22 Jun 2020, 11:19 pm »
Quote from: Tritium on 22 Jun 2020, 07:43 pm
Hello from the middle of the USA.
Have designed and built Preamplifiers, Amplifiers, Speakers, Crossovers, Mixers, Compressors and cables

As always seeing and listening to what others are building is fascinating.
Great music brings inspiration.
I fail as many time as succeeding, A never ending journey of self relization.
Tubes, Transistors, Transformers, Planar, Horn, Electrostatic, Ribbons.
Nothing is off limits.
The only limit is imagination, When that runs out I come here.
Thanks for listening.
Roy

Welcome, Roy
If you're interested in DIY ESL's, you might like my website:  http://jazzman-esl-page.blogspot.com/

Enjoy the AC!
Charlie
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Tritium

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  • Posts: 6
Re: Audio builder from the Midwest saying hello to the Circle.
« Reply #5 on: 27 Jun 2020, 08:07 pm »
Quote from: Jazzman53 on 22 Jun 2020, 11:19 pm
Welcome, Roy
If you're interested in DIY ESL's, you might like my website:  http://jazzman-esl-page.blogspot.com/

Enjoy the AC!
Charlie
Yes, Been to your site and  read the whole thing. Good stuff.
Didn't have any luck rebuilding my Beveridge panels. The panel would always stick to one stator or the other.
Have any experience with those. Friend has one that needs repair.
Triti
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charmerci

Re: Audio builder from the Midwest saying hello to the Circle.
« Reply #6 on: 27 Jun 2020, 09:52 pm »
It goes all the way to 12!  :o   :green:
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Jazzman53

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Re: Audio builder from the Midwest saying hello to the Circle.
« Reply #7 on: 1 Jul 2020, 08:52 pm »
Quote from: Tritium on 27 Jun 2020, 08:07 pm
Yes, Been to your site and  read the whole thing. Good stuff.
Didn't have any luck rebuilding my Beveridge panels. The panel would always stick to one stator or the other.
Have any experience with those. Friend has one that needs repair.
Triti

I have no experience with the Beveridge panels.  However; the operating principle is the same for any 2-stator ESL. 
 
If you have a diaphragm sticking to a stator; it occurred because the diaphragm is tensioned too low prevent it, and it can only be corrected by increasing the diaphragm tension.

The diaphragm is immediately pulled toward the closest stator the instant the biasing voltage is applied.  And it is then pulled with progressively increasing force toward that stator.  The situation is analogous to balancing a pencil on its point-- any slight deviation and gravity topples the pencil in the direction it was leaning.

And once the diaphragm sticks to a stator, it stays stuck even after the music signal is applied-- because the drive mechanism is then shorted. 

I'm not familiar with how a Beveridge panel is bonded together, but if you can remove one stator without detaching the diaphragm; it may then be possible to restore its tension by heat-shrinking it with a heat gun. This could work if the diaphragm was initially mechanically tensioned.  If the diaphragm was initially heat-shrink tensioned; then it may not be possible to shrink it further.  In that case; you would need to replace the diaphragm and tension it high enough to resist being pulled into a stator.   

Hope this helps,
Charlie
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