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Class D Switching Power Amplifiers and Power D/A conversion

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Old 17th March 2013, 11:47 AM   #6561
Julf is offline Julf  Europe
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Quote:
Originally Posted by robbbby View Post
It is connected to the shield of the input cable, which is connected to pin1, which jumps to the outer metal tab of the xlr connector and jumps to my chassis which is also connected to earth. So pin1 shield is common to nampon and the entire chassis.
Just as a test I might consider disconnecting the connection to the xlr connector ground (and thus isolating NAMPON/signal ground from the chassis ground).
 
Old 17th March 2013, 12:06 PM   #6562
robbbby is offline robbbby  Canada
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will try that after work, thanks Julf.
 
Old 18th March 2013, 10:07 PM   #6563
mangew is offline mangew  Sweden
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Mabye a really stupid question but still have to ask.

How to connect a power on switch? i have this one: High Current 40A 125V 10A 250V Power Switch | eBay and an IEC inlet: New Sonar Gold Plated IEC Inlet Fuseholder Sonarquest | eBay

Have never built an amp or something like ncore.
 
Old 19th March 2013, 05:30 AM   #6564
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That IEC inlet looks nice - the switch not so much. You will just need to wire the switch in series from the live terminal from the IEC (the one that comes after the fuse).
I warn you need to be VERY careful if you have not much electrical experience.
 
Old 19th March 2013, 08:13 AM   #6565
Julf is offline Julf  Europe
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Originally Posted by mangew View Post
Ah, another audiophile willing to die for his hobby

I suggest you get a proper switch that satisfies western safety standards, instead of that less-than-safe piece of audiophoolery. That narrow gap between the poles is an accident waiting to happen. Do you feel the power switch will affect sound quality?
 
Old 19th March 2013, 11:43 AM   #6566
mangew is offline mangew  Sweden
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I have decided to go for a regular not so "fancy" black switch from a local seller.
 
Old 19th March 2013, 12:47 PM   #6567
Julf is offline Julf  Europe
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Join Date: Oct 2011
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Quote:
Originally Posted by mangew View Post
I have decided to go for a regular not so "fancy" black switch from a local seller.
Good call! Maybe donate the fancy one to somebody doing a steampunk installation?
 
Old 19th March 2013, 09:12 PM   #6568
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Default NCORE VERSUS L 7 MOSFET

Hi I made this amp for 2 friends. One for the guy I made a NCORE for. Afterwards I made it for the One who bought the NCORE . Everbody think it is a much better amp Class AB MOSFET L7 Audio Power Amplifier Boards Kit Dual Channel 300 350W X2 New | eBay
 
Old 19th March 2013, 09:29 PM   #6569
ro9397 is offline ro9397  United States
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Quote:
Originally Posted by Erlend Sæterdal View Post
Hi I made this amp for 2 friends. One for the guy I made a NCORE for. Afterwards I made it for the One who bought the NCORE . Everbody think it is a much better amp
"Everybody" is sure a lot of people! I'm sure all Ncore owners will dump their amp based on this post...not.
__________________
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"Television is the poor man's whiskey." Russel Baker
 
Old 19th March 2013, 09:39 PM   #6570
Julf is offline Julf  Europe
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Join Date: Oct 2011
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Quote:
Originally Posted by Erlend Sæterdal View Post
Hi I made this amp for 2 friends. One for the guy I made a NCORE for. Afterwards I made it for the One who bought the NCORE . Everbody think it is a much better amp Class AB MOSFET L7 Audio Power Amplifier Boards Kit Dual Channel 300 350W X2 New | eBay
I guess it proves you are better at 1980's technology than at 2010's technology...
 

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