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Old 31st October 2011, 01:35 PM   #1
JL889 is offline JL889  United States
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Join Date: Oct 2011
Location: Atlanta, GA
Default Chipamp 3886 Mono Beta Build

Post your updates for the Chipamp 3886 Mono build here.
B.O.M for 3886 Mono
R1 = 22.1K
R2 = 681R
R3 = 22.1K
R4 = 1K
R5 = 10K
R6 = 2.7R 2W
R7-R8 = 2.2K 2W
C1-C2,C6 = 0.1uF 63V
C3-C5 = 47uF or 100uF 50V
C7-C12 = 1000uF or 1500uF 50V
D1-D7 = MUR860
Joseph Lau (

Last edited by JL889; 9th November 2011 at 03:25 PM.
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Old 7th November 2011, 04:07 AM   #2
syyma is offline syyma  United States
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Location: SF Bayarea
Still waiting the BOM for the 3886.

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Old 7th November 2011, 06:18 PM   #3
benb is offline benb  United States
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Join Date: Apr 2010
I've made a LTspice schematic of the board with corresponding reference designators and typical (datasheet and SWAG) parts values. I've attached it, renane to remove the .txt suffix to load into LTspice. You can DL LTspice for free and load it, but I'll post a screen shot image later if someone wants it.
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Old 9th November 2011, 03:08 PM   #4
imix500 is offline imix500  United States
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Location: Nashville, TN
Parts ordered.
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Old 21st November 2011, 01:31 AM   #5
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Join Date: May 2009
Location: Seattle, WA
I saw that someone was wondering what the dimensions of one of the chipamp boards was, and while I can't help him with those dimensions, I can put the dimensions of the LM3886 Mono Board up here for people to see. I finally got it populated today and will spend the next few weeks (family, job, house and all) building the enclosure for them. Well, here is the link to the pics: Click the image to open in full size.

I also ordered and built the LM4780 Parallel board [LM4780 (1)] pics here: Click the image to open in full size.

And I ordered the LM4780 Bridge/Stereo board [LM4780 (2)] but have not put it together yet. Here are the pics of it as well: Click the image to open in full size.

Since I was at it, I took pics of the ChipAmp power supply. I am using one per LM4780 parallel amp. Click the image to open in full size.

I needed something to do this winter I guess.

Last edited by MadHattter; 21st November 2011 at 01:33 AM.
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