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Old 15th January 2013, 06:36 AM   #5961
Julf is offline Julf  Europe
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Originally Posted by ds23man View Post
But what is wrong with an att. network before the driver?
Apart from screwing up the damping factor? Nothing.
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Old 15th January 2013, 06:38 AM   #5962
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Originally Posted by OllBoll View Post
An even easier (and much more safe one) would be to just use an L-pad attenuator before the NCore. Not as ideal but in the real world it shouldn't matter.
Well, in the case of pos, who I think said he could hear hiss out of the nc400, it might matter to some degree.
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Old 15th January 2013, 07:17 AM   #5963
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Originally Posted by OllBoll View Post
An easy way to remove R141:

First splatter the top and both sides of the resistor with some solder.

Then heat both sides at the same time by laying the soldering iron and when heated just push the resistor away, or push it off with a tweezer.
As I have said before - splatter the ENTIRE resistor with solder, and it will just follow the solder iron when you remove it. Very very simple, and with low risk.
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Old 15th January 2013, 07:24 AM   #5964
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Originally Posted by StigErik View Post
As I have said before - splatter the ENTIRE resistor with solder, and it will just follow the solder iron when you remove it. Very very simple, and with low risk.
Agree.

Now for a more interesting one - advice for replacing (instead of removing) R141, for someone who wants a resistor, but with a different value?
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Old 15th January 2013, 10:23 AM   #5965
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Originally Posted by ds23man View Post
Then you should use a nice 20 watt class A amp for a 113db driver
I came from a 8W class A ...
The ncore is definitely better

Quote:
Originally Posted by OllBoll View Post
just push the resistor away
no, trust me dont push the resistor

what is the iron temperature to use ? 300C ?
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Old 15th January 2013, 10:27 AM   #5966
Telstar is offline Telstar  Italy
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Originally Posted by StigErik View Post
As I have said before - splatter the ENTIRE resistor with solder, and it will just follow the solder iron when you remove it. Very very simple, and with low risk.
This is good advice
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Old 15th January 2013, 12:46 PM   #5967
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Then you should use a nice 20 watt class A amp for a 113db driver
If I had a 113db driver then I would use 2W tube amp.
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Old 15th January 2013, 12:55 PM   #5968
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Or even less. I need only 20W peak with my 88 dB ribbons. In that sense, Ncore is 10x overkill power-wise.
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Old 15th January 2013, 01:04 PM   #5969
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I'm sorry but I don't get it. that resistor is at the edge of the board which should make things easier. and one can practice on a scrapped board. and how in the world is taking a dremel close to the NCORE safer than using a soldering iron? I have worked with surface mount parts, not much but enough to tell you it can be done and I don't have the steadiest hand (due to alcohol and hard drugs abuse, joking) or the best vision (wearing glasses since I was 4) and I managed to do it fine.
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Old 15th January 2013, 05:20 PM   #5970
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Apart from screwing up the damping factor? Nothing.
On the other hand, some drivers do better with higher source impedance, as per Hawksford in his article on current drive.
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