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Old 12th May 2008, 01:18 PM   #11
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LME49600 -- yes, it is a buffer -- and a mean looking one at that.
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Old 12th May 2008, 01:24 PM   #12
Electrons are yellow and more is better!
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Do you plan to use the LME49600 as an output element?
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Old 12th May 2008, 01:46 PM   #13
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Yes, I am going to try it...I then compare vis a vis the Old Colony Super Reg with the AD797, 825, LT1115 etc for noise and impedance.
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Old 12th May 2008, 02:15 PM   #14
Electrons are yellow and more is better!
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A possible improvement is that the buffer is faster than the D44H11.
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Old 14th May 2008, 12:03 PM   #15
AndrewT is offline AndrewT  Scotland
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The "must read" are the series of regulator articles on the Walt Jung site.
Read and re-read and ask until you understand the full content.
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Old 15th May 2008, 12:46 AM   #16
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Quote:
Originally posted by AndrewT
The "must read" are the series of regulator articles on the Walt Jung site.
Read and re-read and ask until you understand the full content.
The articles by WJ and our own Janneman were in AudioXpress in 1995, and WJ had a smaller article in EDN a little later -- I can always get Mr. Didden's attention by quoting him to the effect of:

"It oscillates now what???"
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Old 15th May 2008, 06:44 AM   #17
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You read my mind or what ?

I just read a comment by Scott Wurcer, the designer of the 797, here:

http://www.diyaudio.com/forums/showt...64#post1509264

Wish I had know that at the time...

Jan Didden
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Old 3rd November 2008, 08:50 PM   #18
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Quote:
Originally posted by jackinnj


I've got my parts (LME49600 etc) and am going to compare to the Jung/Janneman etc boards from AX and my own PCB's with the AD797 and AD825.

The LME49600 only became available at DK and Future within the past few days.

Curious if you had made any progress on testing various regulator configs?
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Old 19th September 2009, 01:34 PM   #19
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Almost a year later, here's the version I am going to work with -- mostly surface mount, save the rectifier diodes and electrolytic caps -- I have not had a lot of success mounting smt electrolytics. The reference for each is the LM4040:

Click the image to open in full size.
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Old 19th September 2009, 01:43 PM   #20
Electrons are yellow and more is better!
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Quote:
Originally Posted by jackinnj View Post
I have not had a lot of success mounting smt electrolytics.
A trick if you are going to solder those by hand: Make the pads so they are visible with room for the solder iron tip.

Put fresh tin on the cap

Put tin on a pad and let the cap slide in with the tin still melted.

Solder the other pad.

My latest SMD design is the SSB01, diamond buffer and here I have enlarged the pads somewhat. It the moment I can't reach my homepage but you can try later on to take a look at it.

Jack, I recommend wider power traces and you could also go for ground plane with special care taken to the signal ground at the right.
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Last edited by peranders; 19th September 2009 at 01:46 PM.
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