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24 Search Results Found |
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Forum: Silicon Valley «»
Posted on: Wed, 18 January 2006 12:22 «»
By: Wayne Parham
Re: Group Build National Semiconductor amp
I don't know, I didn't read the magazine. I was just thinkin' it might be fun to build an amp based on the LM3875 and a simple but meaty power supply.
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Forum: General «»
Posted on: Thu, 24 March 2005 11:19 «»
By: Wayne Parham
Re: Cryogenically treated audio components
Sounds interesting. I'm anxious to see and hear what you have at GPAF.Your proposal is a good experiment - Buy two LM1875 or LM3875 chips and cryo one of them. Use them each with identical power supplies, source and speakers and that way you can demonst...
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Forum: Silicon Valley «»
Posted on: Sun, 17 October 2004 17:48 «»
By: Wayne Parham
Re: Where to get LM3875?
Digi-Key has 'em for $5.70 each.
LM3875 at Digi-Key
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| 4 |
Forum: Silicon Valley «»
Posted on: Sun, 17 October 2004 16:48 «»
By: Norris Laughridge
Where to get LM3875?
Where can I find LM3875's for sale?I don't need a kit. I only need the chip.Thanks, Tim
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| 5 |
Forum: Silicon Valley «»
Posted on: Sat, 09 October 2004 15:23 «»
By: Zerger78
Re: New Gainclone/High End Version
Nifty neato. I'll order two LM3875 chips and a breadboard and have a listen for myself!
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| 6 |
Forum: Silicon Valley «»
Posted on: Sun, 19 September 2004 07:41 «»
By: Manualblock
Re: LM3875
So Gnational, what other goodies have you got to share. This little LM3875 amp sounds pretty good. I find it gets a little squirrely as you apply power but at low levels it has a pleasent tonal quality and nice bass. For some reason it reminds me of my ol...
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Forum: Silicon Valley «»
Posted on: Sat, 18 September 2004 21:50 «»
By: Gnational
Re: LM3875
The applications data shows using the chip with only an input resistor, two feedback resistors and a feedback capacitor.Add a +/- power supply and you have instant amp.
LM3875 Applications Data
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| 8 |
Forum: Silicon Valley «»
Posted on: Sat, 18 September 2004 21:14 «»
By: Manualblock
Re: LM3875
Well the thing is if you look at the applications data it suggests a much more complicated circuit than the 47 labs guy utilized. So if he devised the gaincard and you build a copy; ergo, what to call it?I don't know; sounds better than calling an electro...
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| 9 |
Forum: Silicon Valley «»
Posted on: Sat, 18 September 2004 15:38 «»
By: Gnational
LM3875
I have a small bone to pick-Why do so many people talk about "gainclones" when what they really mean is a LM3875 chip amp? No disrespect for 47 Labs but I mean really! The heart of the circuit is the National Semiconductor LM3875. That's really all there ...
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| 10 |
Forum: Pi Speakers «»
Posted on: Fri, 16 July 2004 17:05 «»
By: Tightwad
Re: more altec pi issues
The (slightly modded) Sansui turntable has since been replaced. In this photo, you can see my Russco Cuemaster and Hagerman Bugle phono pre, stock with 9V batteries:Moving down, Bottlehead Foreplay with a LM3875 inverted gainclone power amp, also an old ...
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