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Old 4th February 2013, 08:30 AM   #6301
Zoran is offline Zoran  Serbia
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Location: Belgrade
Thanks again
.
R141=Rg=1.2k
Rf=2.2k
for the NC-400 model

that is what I found in one of the Brunos post
Yes There is no need to change the Rf i was just curious
Thanks
now it is clear
I just need +3db additional gain...
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Old 4th February 2013, 08:33 AM   #6302
Julf is offline Julf  Europe
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Quote:
Originally Posted by Zoran View Post
I just need +3db additional gain...
Just be aware that increasing gain lowers the feedback. While Bruno has commented that increasing feedback is OK, I think you might be in somewhat uncharted waters if you actually lower the feedback from the nominal.

Very interested in hearing your experiences if you try it.
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Old 5th February 2013, 10:21 AM   #6303
Zoran is offline Zoran  Serbia
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According to the present datas should be something like this
(for the 680 ohm Rg, +4db input stage gain)
Attached Images
File Type: jpg NC400 gain.jpg (83.7 KB, 699 views)
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Old 6th February 2013, 09:50 PM   #6304
yetis is offline yetis  United States
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Hi,

Quick question. Can someone point me toward the connector for J1 on the SMPS? I have looked for item # JST-B7B-EHA on Digikey, with no luck. This looks like it, but not the correct item #. I seem to have thrown out the ones that came with my units and need them now.

Thank you
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Old 7th February 2013, 05:42 AM   #6305
jlaakso is offline jlaakso  Finland
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Ask Hypex?
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Old 7th February 2013, 12:20 PM   #6306
ua100k is offline ua100k  United States
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Quote:
Originally Posted by yetis View Post
Hi,

Quick question. Can someone point me toward the connector for J1 on the SMPS? I have looked for item # JST-B7B-EHA on Digikey, with no luck. This looks like it, but not the correct item #. I seem to have thrown out the ones that came with my units and need them now.

Thank you
Digi-Key Part Number
455-1005-ND - Housing.
455-1042-1-ND Crimp
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Old 7th February 2013, 04:08 PM   #6307
pos is offline pos  Europe
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While we are at it, would someone know the exact reference of the female crimp terminal to use with the microfit molex connector 43025-1200 ?
I think it is the 43030, but several version exists:
View List

What is the AWG of the wire?

I would like to fit 2 (or myabe even 3) wires per connector, so if the original AWG is 24, 2 of them should fit no problem in the 20-24 AWG model...

Also, do you know if special tools are required to assembled those crimps, or will a simple crimp tool be sufficient?
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Old 10th February 2013, 09:53 PM   #6308
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My 3 monoblocks with bridged nc400 and SMPS1200A400, built by my friend Georg.

We have compared them against the standard nc400+SMPS600 in a dual-mono config today. The bridged ones sounds much more "alive", and they are not even broken in. The standard ones sounds flatter. Less dynamics.

The monoblocks has version 4 of nc400. The dual-mono has version 3. What was the changes made in version 4?
Attached Images
File Type: jpg DSC_1537.jpg (91.2 KB, 446 views)
File Type: jpg DSC_1550.jpg (267.7 KB, 436 views)
File Type: jpg DSC_1551.jpg (171.7 KB, 498 views)
File Type: jpg DSC_1552.jpg (92.1 KB, 414 views)
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Old 11th February 2013, 05:57 AM   #6309
Julf is offline Julf  Europe
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Quote:
Originally Posted by Rajapruk View Post
We have compared them against the standard nc400+SMPS600 in a dual-mono config today. The bridged ones sounds much more "alive", and they are not even broken in. The standard ones sounds flatter. Less dynamics.
Did you do the comparison as a double-blind ABX, or as a sighted subjective evaluation?
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Old 11th February 2013, 06:09 AM   #6310
ds23man is offline ds23man  Netherlands
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Quote:
Originally Posted by Rajapruk View Post
My 3 monoblocks with bridged nc400 and SMPS1200A400, built by my friend Georg.

We have compared them against the standard nc400+SMPS600 in a dual-mono config today. The bridged ones sounds much more "alive", and they are not even broken in. The standard ones sounds flatter. Less dynamics.

The monoblocks has version 4 of nc400. The dual-mono has version 3. What was the changes made in version 4?
I am missing the cap across the output terminals!
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