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Old 21st November 2011, 03:10 AM   #21
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Default Getting the hang of it. . .

Here are the pics / dimensions of the Chipamp power supply.
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File Type: jpg Chipamp PS Height.jpg (706.4 KB, 329 views)
File Type: jpg Chipamp PS Length.jpg (297.9 KB, 300 views)
File Type: jpg Chipamp PS Width.jpg (911.3 KB, 287 views)

Last edited by MadHattter; 21st November 2011 at 03:12 AM. Reason: Edited text.
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Old 21st November 2011, 03:13 AM   #22
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Here are the pics / dimensions of the finished LM3886 Mono Board.
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File Type: jpg LM3886 Mono Height.jpg (889.5 KB, 266 views)
File Type: jpg LM3886 Mono Length.jpg (864.7 KB, 239 views)
File Type: jpg LM3886 Mono Width.jpg (339.4 KB, 105 views)
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Old 21st November 2011, 03:17 AM   #23
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LM4780 stereo integrated board pics / dimensions.
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File Type: jpg LM4780 Stereo Height.jpg (740.3 KB, 77 views)
File Type: jpg LM4780 Stereo Length.jpg (435.5 KB, 61 views)
File Type: jpg LM4780 Stereo Width.jpg (353.8 KB, 64 views)
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Old 21st November 2011, 03:18 AM   #24
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LM4780 Parallel board pics / dimensions.
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File Type: jpg LM4780 Parallel Height.jpg (273.0 KB, 59 views)
File Type: jpg LM4780 Parallel Length.jpg (973.3 KB, 62 views)
File Type: jpg LM4780 Parallel Width.jpg (880.6 KB, 66 views)
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Old 21st November 2011, 03:22 AM   #25
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Quote:
Originally Posted by MadHattter View Post
I am fairly new to the forum, and I am not sure if this is bad form, but I posted this to the LM3886 Beta Build thread as well, but I wanted to let others know about the board dimensions. I apologize if it is bad form. Someone please let me know if it is.

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.
I would like to apologize for stating that the LM4780 Stereo/Parallel board (blue) was a bridged / stereo board. I think it is time for me to go to bed.
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Old 23rd November 2011, 10:43 PM   #26
jb74 is offline jb74  United States
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Default Re: Post #1 listing parts values for the LM4780 parallel boards

I have several of these LM4780 boards (red) purchased from Chipamp.com in 2005

At that time the values for R6 and R7 were shown as 1.0k for each

What is the explanation for the change in their value to 221 ohms ?

Thanks
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Old 25th November 2011, 06:10 AM   #27
GloBug is offline GloBug  Canada
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How's everyone doing with there projects? Any plans to work on them this weekend?

Have fun. Al
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Old 25th November 2011, 06:37 AM   #28
UrSv is offline UrSv  Sweden
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I'll be working on my two boards this weekend. They have been populated and now the enclosures needs some work which I hope there will be time for during the weekend.
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Old 25th November 2011, 11:58 AM   #29
GloBug is offline GloBug  Canada
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Cool!
For some reason I feel hungry....is that Swiss cheese on that burger?
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Old 27th November 2011, 05:26 PM   #30
UrSv is offline UrSv  Sweden
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The enclosures are coming along nicely but as always when doing metal work it's a real pain not to have a proper shop to do things in. I bought a drill press from a local store earlier this week as it was on sale for a ridiculous EUR 54. Not that free hand milling is the way to do things but the precision was good enough for the mains receptacle which is the type with switch and fuse holder integrated (saved me two holes per panel ).

I'm using the power supply boards I had left over from a pair of Chipamp LM3886 amps. The build is a three channel amp with one LM4780 stereo board that will be for tweeter and boomer. The parallel LM4780 (1) from this Beta Build will be for the woofer. I'm currently looking to replace the HifiDIY.net boards with stereo boards from Chipamp or Audiosector as I like the smaller boards and it would look just a little bit nicer. Not that it would be visible. The enclosures will be mirror image back panels and will be standing close to each speaker with a component video cable (which reduces cable clutter as it is effectively one cable but will carry three signals) connected to the 2x8 MiniDSP which I'll use as filter.

Transformers are Amplimo 2*22 VAC @ 160 VA which will be just fine per channel.

Next thing to source is some aluminium L-shaped extrusions I need in order to mount the boards nicely to the side profiles of the case. Why, oh why, doesn't anybody sell 10 and 35 mm aluminium extrusions with 1 mm thickness where I live?

Quote:
Originally Posted by GloBug View Post
Cool!
For some reason I feel hungry....is that Swiss cheese on that burger?
Nah, it's cheese on a Max Burger from Sweden.
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Last edited by UrSv; 27th November 2011 at 05:40 PM. Reason: Added text.
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