FYI: Linkwitz has updated his LM3886 design

akunec · 7th April 2005, 08:48 PM

Adam M. · 7th April 2005, 09:42 PM

Link? I checked my bookmark to his amp and it is still the one from 2000

CornelisJ · 7th April 2005, 10:04 PM

Can you give a link?

Davey · 8th April 2005, 04:41 AM

http://www.linkwitzlab.com/images/graphics/3886amp.gif

I'm not sure what he changed, but there is a date of 3-27-05 noted on the bottom so he's updated it somehow.

Cheers,

Davey.

demogorgon · 8th April 2005, 09:22 PM

I dont have the old one, but i cant see what have been changed..

i remember looking it over, trying to understand the reason for the ekstra parts..

Davey · 8th April 2005, 11:38 PM

Here's a copy of the old one:

http://www.woodartistry.com/linkwitz...cs/3886amp.gif

The only difference I see is the removal of the capacitor across the feedback resistor and the capacitor across the input terminals.

Davey.

sek · 9th April 2005, 12:55 AM

This is quite interesting, as I have integrated the input (RFI) filter capacitor (but not the feedback bypass cap).

Would be good to know SL's motivation to no longer recommend them. Perhaps he found them to be unneccessary and thus did the engineering step to leave out what's not required.

Sebastian.

PS: One can actually see where he used the eraser.

wingwing · 10th April 2005, 06:13 PM

because lm3886 is not unity gain stable

... It was a SL3886 problem which carlosfm pointed out few weeks ago

wingwing · 10th April 2005, 06:32 PM

By the way....I love SL's website so much. Very informative

7th April 2005, 08:48 PM	#1
akunec diyAudio Member Join Date: Aug 2004 Location: Alberta	FYI: Linkwitz has updated his LM3886 design FYI: Linkwitz has updated his LM3886 design

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7th April 2005, 09:42 PM	#2
Adam M. diyAudio Member Join Date: Feb 2004 Location: Pittsburgh	Link? I checked my bookmark to his amp and it is still the one from 2000

7th April 2005, 10:04 PM	#3
CornelisJ diyAudio Member Join Date: Oct 2004	Can you give a link?

8th April 2005, 04:41 AM	#4
Davey diyAudio Member Join Date: Dec 2001 Location: Bremerton, WA.	http://www.linkwitzlab.com/images/graphics/3886amp.gif I'm not sure what he changed, but there is a date of 3-27-05 noted on the bottom so he's updated it somehow. Cheers, Davey.

8th April 2005, 09:22 PM	#5
demogorgon diyAudio Member Join Date: Jul 2004 Location: Behind you.	I dont have the old one, but i cant see what have been changed.. i remember looking it over, trying to understand the reason for the ekstra parts..

8th April 2005, 11:38 PM	#6
Davey diyAudio Member Join Date: Dec 2001 Location: Bremerton, WA.	Here's a copy of the old one: http://www.woodartistry.com/linkwitz...cs/3886amp.gif The only difference I see is the removal of the capacitor across the feedback resistor and the capacitor across the input terminals. Davey.

9th April 2005, 12:55 AM	#7
sek diyAudio Member Join Date: May 2003 Location: Berlin	This is quite interesting, as I have integrated the input (RFI) filter capacitor (but not the feedback bypass cap). Would be good to know SL's motivation to no longer recommend them. Perhaps he found them to be unneccessary and thus did the engineering step to leave out what's not required. Sebastian. PS: One can actually see where he used the eraser.

10th April 2005, 06:13 PM	#8
wingwing diyAudio Member Join Date: Apr 2004 Location: montreal	because lm3886 is not unity gain stable ... It was a SL3886 problem which carlosfm pointed out few weeks ago

10th April 2005, 06:32 PM	#9
wingwing diyAudio Member Join Date: Apr 2004 Location: montreal	By the way....I love SL's website so much. Very informative

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