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Old 13th March 2011, 10:15 AM   #11
Zen Mod is offline Zen Mod  Serbia
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can you calculate from this schematic that power consumption of channel is under 1W ?
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Old 13th March 2011, 12:33 PM   #12
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I got it the informtaion I think its 10-20mA per channel.
So 10VA would be minimum.
I will use only 1 tx 2x30VAC 50VA for stereo.
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Old 13th March 2011, 02:03 PM   #13
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yes its much lower than owens d1, where each fet is operating about 130ma
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Old 13th March 2011, 02:08 PM   #14
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Quote:
Originally Posted by merlin el mago View Post
I got it the informtaion I think its 10-20mA per channel.
So 10VA would be minimum.
I will use only 1 tx 2x30VAC 50VA for stereo.
well - you asked , and I wrote exact currents on schematic , which you obviously didn't looked .
anyway - power cons. is under 1W/per channel

exact requirement for xformer depends of reg used ;
I know that with regs I usually prefer , 50W will suffice for both channels

in your case , you can probably feed 10 stereo D1's with 50W
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Old 13th March 2011, 02:41 PM   #15
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I will use Salas Low Voltage Shunt Regulator, I find 1 tx 2x30VAC 60VA can be enough?
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Old 13th March 2011, 02:55 PM   #16
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well - either ask Salas , or post exact schematic here , or post link to it .
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Old 13th March 2011, 02:56 PM   #17
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besides that - you need to know on which DC level is output of PCM1704 , so you'll need to set input of D1 to same level
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Old 13th March 2011, 03:12 PM   #18
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Quote:
Originally Posted by Iloveswan View Post
You should raise R2a's value a little bit unless you can accept around 1Vrms output. If you raise R2a's value, you need to change source resistors value accordingly too.
Wich value for R2a (R2b) & wich resistor is source resistor & value needed to get 2Vrms?
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Old 13th March 2011, 03:14 PM   #19
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Quote:
Originally Posted by Zen Mod View Post
besides that - you need to know on which DC level is output of PCM1704 , so you'll need to set input of D1 to same level
The I/V is designed for DAC current output PCM1704, PCM56, etc.
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Old 13th March 2011, 03:17 PM   #20
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Quote:
Originally Posted by Zen Mod View Post
well - either ask Salas , or post exact schematic here , or post link to it .
Minimum diff. to work 8-10V Vin-Vout, so for 42.3Vin can regulate 30Vout

Click the image to open in full size.

Click the image to open in full size.

Thanks for help.

Last edited by merlin el mago; 13th March 2011 at 03:20 PM.
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