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Old 18th March 2012, 04:08 PM   #601
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Thanks again for your very good advice, I will try first with two 9V alkaline batteries first.

If I understood well your schematic: I need to connect a 10R + 100pF polystyrol between each DAC output (10R) + (100p) to AGnd ES9018 (Agnd is gnd in the AVcc TP module?)

First I need to learn what is a horse, thanks for support Patrick.

Felipe
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Old 18th March 2012, 06:45 PM   #602
EUVL is offline EUVL  Europe
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> I will try first with two 9V alkaline batteries first.

You need 2x 9V battery for one single ended SEN.
So for 2 channel balanced, you need 8x 9V battery altogether. Still less than 10 Euros.
Once working you can decide whether to go rechargeable, or mains based floating.

> I need to connect a 10R + 100pF polystyrol between each DAC output
> (10R) + (100p) to AGnd ES9018 (Agnd is gnd in the AVcc TP module?)

Correct. You may also use 100p silver mica if you wish.
And you should do this close to the ES9018 PCB from whatever supplier.
The purpose is to shunt some of the HF components of the i_out of the DAC.

Wish Nic will show you some photos soon.


Patrick
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Old 18th March 2012, 07:41 PM   #603
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Patrick

can you share a charging circuit for NiMh battereis to be used with Sen
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Old 18th March 2012, 08:05 PM   #604
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Quote:
Originally Posted by samoloko View Post
Patrick

can you share a charging circuit for NiMh battereis to be used with Sen
+1
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Old 19th March 2012, 04:05 AM   #605
EUVL is offline EUVL  Europe
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Some time this week.

Build the SEN first.
Your motivation will increase exponentially for the charger.




Patrick
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Old 19th March 2012, 12:13 PM   #606
EUVL is offline EUVL  Europe
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Here the schematics again properly drawn.
Unless I made some careless mistakes, they should be the same as that of post#593.

I have removed the 10R-100p at the current outputs of the ES9018.
They are most likely to be not very effective there due to the low Zin of the SEN IV V18.
You should instead experiment with C_iv in parallel with R_iv, starting with 100p.

Charger circuit later in the week.


Patrick
Attached Images
File Type: png ES9018 for SEN IV.png (152.6 KB, 821 views)
File Type: png SEN IV V18 Schematics.png (162.8 KB, 810 views)
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Old 19th March 2012, 12:42 PM   #607
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Thanks Patrick

Felipe
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Old 19th March 2012, 02:13 PM   #608
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can't wait to get my heatsinks from Mark for the 2sk372Vs i'm going tu use for this ..
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Old 19th March 2012, 02:24 PM   #609
CeeVee is offline CeeVee  Portugal
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Quote:
Originally Posted by samoloko View Post
Patrick

can you share a charging circuit for NiMh battereis to be used with Sen
You can probably see something very similar if you look for the O2 portable headamp in the Forum
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Old 19th March 2012, 03:24 PM   #610
jambul is online now jambul  Belgium
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Dear Patrick,
Can we apply your sen for es9018 sen for pcm1794?

What need to be adjust?
Thank you for your kind assistance

Regards
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