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 Post subject: Line array from microphone capsules...
PostPosted: Wed Dec 07, 2011 10:13 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
I dreamed long time to make line array speakers from microphone capsules, and power them from transformerless tube amp.
Finally, I bought 32 very cheap Karaoke microphones from Consulting-hk.com.

And discovered that I need to punch 32 hones in panels... Evil or Very Mad

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А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!


 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Sat Dec 10, 2011 8:05 pm 
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Joined: Mon Mar 22, 2010 1:10 am
Posts: 238
Any photos. A bit difficult to visualise.


 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Sat Dec 10, 2011 10:46 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Not ready for photos yet. I stopped in Tap Plastics today and asked for the quote for such a tall box, with 16 holes, made of Lexan. Looks doable.

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А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!


 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Thu Mar 01, 2012 5:57 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Today I got a message that my panels are ready. When I arrived I found they contain 4 holes each, like on the picture, despite it was written "16 of 1 1/8" holes". Promised to correct tomorrow, then I will take pictures.

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А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!


 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Sat Mar 03, 2012 5:27 am 
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Кащей Биссмертный

Joined: Fri Mar 10, 2006 6:11 am
Posts: 86
Location: Кавказ
Can't make out what's all this hustle and vussle about boxes and karaoke mikes is about.
Does it cost the expenses?
What will be the sound like?


 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Sun Mar 11, 2012 2:35 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Here is it:


Attachments:
mirror_array.gif
mirror_array.gif [ 246.59 KB | Viewed 5330 times ]

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А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!
 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Mon Mar 12, 2012 10:30 am 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Rear side: gluing capsules


Attachments:
array_mic_capsules_rear.gif
array_mic_capsules_rear.gif [ 243.69 KB | Viewed 5322 times ]

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А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!
 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Mon Mar 12, 2012 1:58 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Attachment:
mic_capsules_la.gif
mic_capsules_la.gif [ 350.93 KB | Viewed 5307 times ]

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А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!


 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Wed Mar 14, 2012 10:10 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Amplifier layout


Attachments:
pict001.jpg
pict001.jpg [ 209.46 KB | Viewed 5274 times ]

_________________
А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!
 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Fri Mar 16, 2012 5:09 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Building one more speaker...


Attachments:
mics1.gif
mics1.gif [ 224.71 KB | Viewed 5259 times ]

_________________
А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!
 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Fri Mar 16, 2012 5:10 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Attachment:
mics2.gif
mics2.gif [ 224.85 KB | Viewed 5247 times ]

_________________
А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!


 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Fri Mar 16, 2012 5:11 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Attachment:
mics3.gif
mics3.gif [ 252.13 KB | Viewed 5272 times ]

_________________
А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!


 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Fri Mar 16, 2012 5:18 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Classical books, for classical music...


Attachments:
mics-4.gif
mics-4.gif [ 238.12 KB | Viewed 5249 times ]

_________________
А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!
 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Sun Mar 18, 2012 11:47 am 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Here is the amp breadboard. HP/Paeco transformer from vacuum tube voltmeter will give me about 600V rectified. I will split it on 120V (negative supply) on a shunt regulator in series with load, B+ will be 420V regulated by pass regulator. Both 6.3V windings in series to power filaments of 12L6GT tubes on the 2'nd floor of SRPP. Rectified by pair of Shottky diodes it will be something like 8V from which I will get 6.3V stabilized and 4.2V stabilized, for 6F1P and 4P1L tubes.

Each output stage will consume about 50 mA, that means 100 mA total. 120V shunt regulator have to dissipate 12W of power.

For free convection thermal resistance roughly depends on area of heatsink as Q = 50/√S (°C/W). Let's limit overheating by 60 degrees. Q=60/12 = 5 °C/W.
(50/5)^2=100 square centimeters. I need heatsinks as well for B+ pass regulator and filament regulators, so heatsinks on side walls of chassis will look and work well.


Attachments:
p02.jpg
p02.jpg [ 188.65 KB | Viewed 5204 times ]

_________________
А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!
 
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 Post subject: Re: Line array from microphone capsules...
PostPosted: Mon Mar 26, 2012 7:20 pm 
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Шаман, типа...

Joined: Tue Feb 10, 2004 12:30 pm
Posts: 7312
Location: Pleasant Hill, California
Heatsinks will be mounted on side panels, transistors will be covered (up to 600V on them!).


Attachments:
pict001800x600.jpg
pict001800x600.jpg [ 232.44 KB | Viewed 5172 times ]

_________________
А женщина даже в мужской рубашке выглядит гораздо приличнее, чем мужчина в женских колготках! Be-be-be!
 
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