Joachim Gerhard Filter Buffer for ES9022 - Page 62 - diyAudio
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Old 24th June 2013, 12:46 PM   #611
kumori is offline kumori  Europe
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Quote:
Originally Posted by EUVL View Post
I don't know what DAC you are using, but if you use 240R for SEN, you might not have 2Vrms output.


Patrick
I´m using SEN with 180R after ES9018 at the moment. My pot is at 11 o´clock maximum, so this is plenty.
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Old 24th June 2013, 04:45 PM   #612
EUVL is offline EUVL  Europe
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Then use 180R. No need to change to 240R.


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Old 25th June 2013, 06:23 PM   #613
EUVL is offline EUVL  Europe
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I have been asked again by PM about documents for component placement.

As I said in post #423, all the information you need has already been published in the thread.
All you need to do is to help youself and make use of the excellent "search this thread" function of the forum.
And you will get this straight away :
Joachim Gerhard Filter Buffer for ES9022


Patrick
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Old 25th June 2013, 06:39 PM   #614
Mull3t is offline Mull3t  United States
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Quote:
Originally Posted by kumori View Post
As I understand it, the XEN team advises to use batteries with the buffer.
But also, since batteries are not everybody's cup of tea, you can use the low impedance, low noise power supply regulator of your choice. For best results, use a bipolar supply for each channel.
I'm going to use two Sigma 25 +15v supplies. Wired up correctly you can get +/-15v and 0v that go to the buffers +Vs, --Vs, and 0v points.

Are you sure two bipolar supplies are required? I would think if you were going balanced you'd need two supplies. Maybe I'm misunderstanding your answer.
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Old 25th June 2013, 07:39 PM   #615
kumori is offline kumori  Europe
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Originally Posted by Mull3t View Post
I'm going to use two Sigma 25 +15v supplies. Wired up correctly you can get +/-15v and 0v that go to the buffers +Vs, --Vs, and 0v points.

Are you sure two bipolar supplies are required? I would think if you were going balanced you'd need two supplies. Maybe I'm misunderstanding your answer.
Ok, I guess this should also work. You can only use one supply with -15v/0v/+15v and connect to the designated points.

For the two supplys (I might need some help here, my memory is not that good anymore), I read somewhere in this thread, that it might be beneficial to supply every channel (there are two on the pcb) with its own supply (two times -15v/0V/+15v, one for every channel).

There is a 220uF/10R input filter at each supply line. If i understood it correctly, it is ok to remove the 10R resistor and attach the mono-supplies to the pad of the former 10R. However, I did not do this and can say nothing about whether it is worth a second supply.


Quote:
Then use 180R. No need to change to 240R.
Alright then, thank you.
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Old 26th June 2013, 02:29 AM   #616
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Just ran into this on ebay...

DAC-24192-ULN, 24Bit/192KHz DAC, I2S Input, Ultra Low Noise Regulator Circuit

Are the ES9022 and ES9023 similar? Would I be able to use the JG filter with this device?
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Old 26th June 2013, 10:17 PM   #617
kumori is offline kumori  Europe
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Quote:
Originally Posted by merlin2069er View Post
Are the ES9022 and ES9023 similar? Would I be able to use the JG filter with this device?
I think there is one thread in this forum, that covers exactly this topic (es9023 with JGFB). A quick search should bring it up, I don't remember the exact subforum.
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Old 26th June 2013, 10:48 PM   #618
TNT is offline TNT  Sweden
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Quote:
Originally Posted by EUVL View Post
I have been asked again by PM about documents for component placement.

As I said in post #423, all the information you need has already been published in the thread.
All you need to do is to help youself and make use of the excellent "search this thread" function of the forum.
And you will get this straight away :
Joachim Gerhard Filter Buffer for ES9022


Patrick
Tnxs!
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Old 27th June 2013, 12:38 PM   #619
TNT is offline TNT  Sweden
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On top side I find a diff... are the two 0 and 100R just moved to the right or did they also change place?
Attached Images
File Type: jpg _MG_3091 copy.jpg (229.4 KB, 453 views)

Last edited by TNT; 27th June 2013 at 12:39 PM. Reason: pic
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Old 27th June 2013, 01:16 PM   #620
EUVL is offline EUVL  Europe
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Just moved to the right in the revised PCB for Batch 2 in order to remove empty pads for extra FETs inparallel in Version 1.


Patrick
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