PASSIVE RELAY-BASED CONTROLL ROOM KITS BUILD/SUPPORT TREAD

Igor

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Jul 17, 2006
Messages
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Location
Israel
Hi guys, as promissed to Christmass...

PASSIVE CONTROLL ROOM KITS!

crm_sm.jpg


DESCRIPTION:

PASSIVE, BALANCED SOUNDPATH
AUDIO PASSING THRU RELAYS AND METAL FILM RESISTORS ONLY
4 INPUTS (SELECTOR 1 OF 4)
2 SPEAKERS AND SUB OUT SELECTOR
64 STEPS OF 1 DB LEVEL CONTROLL
MONO, DIM, TALKBACK FUNCTIONS
USER-DEFINEABLE LEVEL OFFSETS ON EVERY INPUT AND OUTPUT
USER-DEFINEABLE LEVEL OFFSETS FOR MONO, DIM AND TALKBACK CONTROLLS


SEPARATE CONTROLL AND AUDIO UNITS
(POSSIBLE TO PUT AUDIO BOX IN GEAR RACK AND CONTROLL UNIT ON TABLE,
BEST ERGONOMICALLY AND SOUND-WISE )
NO AUDIO GOING THRU 15-PIN VGA CABLE, ALL AUDIO IS KEPT INSIDE RACK BOX


Here's some preliminary pictures:

http://i251.photobucket.com/albums/gg291/diy33609/P1010542.jpg
http://i251.photobucket.com/albums/gg291/diy33609/P1010539.jpg
http://i251.photobucket.com/albums/gg291/diy33609/P1010537.jpg
http://i251.photobucket.com/albums/gg291/diy33609/P1010534.jpg
http://i251.photobucket.com/albums/gg291/diy33609/P1010530.jpg
http://i251.photobucket.com/albums/gg291/diy33609/P1010527.jpg
http://i251.photobucket.com/albums/gg291/diy33609/P1010525.jpg


SCHEMATICS
(big sized pictures, right-click and save-as):


http://i251.photobucket.com/albums/gg291/diy33609/schem_audio.gif
http://i251.photobucket.com/albums/gg291/diy33609/pcb_audio.gif
http://i251.photobucket.com/albums/gg291/diy33609/contr_SCH.gif
http://i251.photobucket.com/albums/gg291/diy33609/contr_top.gif
http://i251.photobucket.com/albums/gg291/diy33609/contr_btm.gif

Talkback combiner:

http://www.groupdiy.com/index.php?topic=31609.0

http://i251.photobucket.com/albums/gg291/diy33609/tb_comb_sch.gif
http://i251.photobucket.com/albums/gg291/diy33609/tb_comb_pcb.gif


Kit contains everything except power supply, case and VGA cable.

Ordering:

http://www.groupdiy.com/index.php?topic=29771.0
 

bobschwenkler

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Dec 8, 2005
Messages
483
Location
Olympia, WA
That looks great! If I didn't already have money into an expensive Elma switch for a controller I might jump on one of these. Maybe in the future I still will.

Does the chassis for the cotrol module come with the kit?
 

Igor

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Messages
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Location
Israel
If I didn't already have money into an expensive Elma switch for a controller

Just wondering, which Elma switch, how many steps of volume controll and how many resistors
audio passing when it at the middle position? Does this switch has hermetically sealed contacts?
IMHO, Elma is not as expensive as this controller sound and ergonomically-wise....

All questions about racking and front pannels please ask Purusha.
I think it is possible to offer great sollution with plexi front pannel for controller.
 

rob_gould

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Jul 8, 2007
Messages
1,266
Location
Netherlands
Hi Igor,

I'll be one of the first ten please :)

Will you be starting a new thread in the black market, or adding this to your sticky?

Payment waiting...

 

rob_gould

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:-[  Oops.  Checked the date of the last post but you updated the first post of course :-[ :-[
 

rob_gould

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Messages
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Location
Netherlands
Hi Igor,

Will it be possible to release exact dimensions of the control unit (positions of the components etc) for those of us wishing to do our own cases and panels?

Thanks,

Rob
 

Igor

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Jul 17, 2006
Messages
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Location
Israel
I will post updated .cdr files for controller's plexi and 1RU back within a few days,
for those who want to make their own cases.
But, please check for Purusha cases option :)
 

bobschwenkler

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Dec 8, 2005
Messages
483
Location
Olympia, WA
Igor said:
If I didn't already have money into an expensive Elma switch for a controller

Just wondering, which Elma switch, how many steps of volume controll and how many resistors
audio passing when it at the middle position? Does this switch has hermetically sealed contacts?
IMHO, Elma is not as expensive as this controller sound and ergonomically-wise....

The Elma certainly is not as nice as your option... It's a 24 pos. switch which I'll probably wire up as a potentiometer. But I've already bought it. We'll see. I definitely am interested in your unit.

Again, does the chassis for the controller module come with the kit?
 

Igor

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Jul 17, 2006
Messages
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Location
Israel
Hi Bob, all questions about racking please ask Purusha.
I definately going to order from him some boxes for this project.

Just as tip, if you using Elma in pot connection,
IMHO best total value is 5k.
 

Igor

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Messages
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Israel
Hi ioaudio, I will post more pics later with Purusha case,
they will include pipe as well.
BTW, 2 Christmass offer kits still waiting!!!!
 

Moby

BV.8, Bv.11, Bv.12, etc... contact by email
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Great work Igor  :) Is it possible to extend speakers selector to 4 pairs? If yes I'm in  ;D One more question... How did you implemented talkback function? Is the CR level dimmed when TB is pressed?
 

Igor

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Messages
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Location
Israel
Is it possible to extend speakers selector to 4 pairs?

You can interchange input and output selectors with some minor mods....
This way SUB becomes useless, i.e. 2 inputs and 4 outputs.

Or, just buy my mastering console monitor section :)
It has 127.5 db range in 0.5 db steps and more functions....

One more question... How did you implemented talkback function?
Is the CR level dimmed when TB is pressed?

There's talkback combiner, which mixing small electret mic signal
into playback L-R feed from external source  (or same source as CR).
When TB pressed, CR level goes down by user-defineable value (0...-20dB)
and playback level dim'ed as well by 8 dB.

Talkback combiner has balanced 20k inputs and ground-compensated outs.

If TB pressed more than 4...5 sec, it latches; press again to off.

I will post schems and other info about TB combiner in few days.
 

Moby

BV.8, Bv.11, Bv.12, etc... contact by email
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Thanks for info Igor :)
Or, just buy my mastering console monitor section Smiley
It has 127.5 db range in 0.5 db steps and more functions....
I'm not familiar with that, sorry, can you give some more info about? Kit, finished product, PCB  ???
 

Igor

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Location
Israel
Sorry, for mastering console, no kits  ;D 8)

For finnished product, PM.
 

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