Modify behringer DEQ2496? - Page 6

ThorstenL · 7th March 2005, 08:42 PM

Konnichiwa,

Quote:

Originally posted by stef1777
The schematics posted below are for the DCX not the DEQ.

Note that I said the anaologue I/O for the DEQ used IN PRINCIPLE the same circuitry. I did a rudimentary trace on my own unit to confirm. I noted that component designations would not line up.

However, for people wanting simple mods it should be non too hard to trace the DAC signals especially to the first summing mp and equally the ADC inputs to the Balancing Dual Op-Amp.

The changing the relevant resistors to the "right" types should be childs play.

Sayonara

R Dijk · 8th March 2005, 11:23 PM

Just a nightthought about 100 step resistor nettwork using binary counter. putting two resistor-netts in paralell and bin counter selecting pot lets you take "one half" step at the time.
anyone tryed somthing similar ?

Ryssen · 11th June 2005, 11:33 PM

This question may not belong in this thread,but when you take the signal out of the digital output is it the processed by the eq or is it a unprocessed signal?

deerhunt · 12th June 2005, 10:25 AM

A picture says more than...
Hope it helps.

brgs

Ryssen · 18th June 2005, 06:07 PM

Is it okay to use LM317 and LM337 to adjust the analog power to +- 12v to use AD8620?For output and input

stef1777 · 18th June 2005, 06:19 PM

Quote:

Originally posted by ryssen
Is it okay to use LM317 and LM337 to adjust the analog power to +- 12v to use AD8620?For output and input

You can may be use 12V fixed version to have less components to add. Space is counted.

You can may be replace the two caps before reg with better and bigger version, en replace the caps at out with tantalium caps.

I personaly used 2 x 1000UF 35V and 2 x 10UF 25V tantalium.

Ryssen · 18th June 2005, 07:53 PM

Another question,is it allright to short the input e-lyts and the ones inbeetwen the ic´s?

OLES · 2nd August 2005, 11:20 AM

Hi
what does it do this amplifier - TL072 ?

ChuckT · 6th August 2005, 05:52 AM

For the pure passive output stage KYW mentioned, I found this app note in Jensen trans with circuit for CS4396.

http://www.jensen-transformers.com/as/as093.pdf
http://www.jensen-transformers.com/d...s/11ssp8ma.pdf

It uses the very expensive JT-11ssp-8ma "Repeat Coil" trans for voltage out differential dac like the CS4396 which is almost the same as the AKM4393 used in the deq/dcx2496.

Now I don't know is the difference between a split winding "repeat coil" and other 600:600 trans. I have a UTC W-786 600:600 and wonder if this is also suitable for the Jensen output stage. Thanks.

Ryssen · 17th August 2005, 03:07 AM

Could I remove the digital input transformer,sins it is 1:1 and take the digital direct to dac input?

8th March 2005, 11:23 PM	#52
R Dijk diyAudio Member Join Date: Mar 2005 Location: i live here	200 steps volume controll Just a nightthought about 100 step resistor nettwork using binary counter. putting two resistor-netts in paralell and bin counter selecting pot lets you take "one half" step at the time. anyone tryed somthing similar ?

12th June 2005, 10:25 AM	#54
deerhunt diyAudio Member Join Date: Feb 2004 Location: sweden	A picture says more than... Hope it helps. brgs __________________ deerhunt

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11th June 2005, 11:33 PM	#53
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	This question may not belong in this thread,but when you take the signal out of the digital output is it the processed by the eq or is it a unprocessed signal?

18th June 2005, 06:07 PM	#55
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	Is it okay to use LM317 and LM337 to adjust the analog power to +- 12v to use AD8620?For output and input

18th June 2005, 07:53 PM	#57
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	Another question,is it allright to short the input e-lyts and the ones inbeetwen the ic´s?

6th August 2005, 05:52 AM	#59
ChuckT diyAudio Member Join Date: Nov 2002 Location: HK	For the pure passive output stage KYW mentioned, I found this app note in Jensen trans with circuit for CS4396. http://www.jensen-transformers.com/as/as093.pdf http://www.jensen-transformers.com/d...s/11ssp8ma.pdf It uses the very expensive JT-11ssp-8ma "Repeat Coil" trans for voltage out differential dac like the CS4396 which is almost the same as the AKM4393 used in the deq/dcx2496. Now I don't know is the difference between a split winding "repeat coil" and other 600:600 trans. I have a UTC W-786 600:600 and wonder if this is also suitable for the Jensen output stage. Thanks.

17th August 2005, 03:07 AM	#60
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	Could I remove the digital input transformer,sins it is 1:1 and take the digital direct to dac input?

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