Well, construction of the LM4780s is well under way, and they are very nice boards. I have no problems with recommending them to anyone. As soon as I get the output resistors, (possibly sooner if I can't wait), then I will be firing them up and will give my observations.
However, a small recommendation for Rev B, it would be nice if the main caps were moved slightly out, so you could get to the screws to fix the chip to the heatsink, or the caps moved back so you can get a thick clamping plate in to hold the chip down. As it is, you just have to put the PSU caps in after fixing the heatsink. Not a major problem really, but I think we all want these to be perfect!
However, a small recommendation for Rev B, it would be nice if the main caps were moved slightly out, so you could get to the screws to fix the chip to the heatsink, or the caps moved back so you can get a thick clamping plate in to hold the chip down. As it is, you just have to put the PSU caps in after fixing the heatsink. Not a major problem really, but I think we all want these to be perfect!
pinkmouse said:However, a small recommendation for Rev B, it would be nice if the main caps were moved slightly out, so you could get to the screws to fix the chip to the heatsink, or the caps moved back so you can get a thick clamping plate in to hold the chip down. As it is, you just have to put the PSU caps in after fixing the heatsink. Not a major problem really, but I think we all want these to be perfect!
That is true, the caps preferrably should be installed after the chip is mounted to the heatsink. But this design decision was made only because we wanted those boards to be perfect
.Moving the caps away (and increasing the board size) would be a sort of compromise, and less than perfect layout. Even as it is now, with a proper screwdriver and Panasonic caps (which have smaller dia than BGs), it is still possible to mount the chip with the caps onboard.
Banned
Joined 2002
I am working on revising the boards, and will order new boards soon.
Here is the LM3886 board I worked on:
http://www.diyaudio.com/forums/showthread.php?postid=554825#post554825
Here is the LM3875 board:
http://www.diyaudio.com/forums/showthread.php?postid=554829#post554829
Sorry for the lack of posting on diyAudio, as I was busy with work, holidays and going to CES. I hope everyone had a good holiday
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Brian
Here is the LM3886 board I worked on:
http://www.diyaudio.com/forums/showthread.php?postid=554825#post554825
Here is the LM3875 board:
http://www.diyaudio.com/forums/showthread.php?postid=554829#post554829
Sorry for the lack of posting on diyAudio, as I was busy with work, holidays and going to CES. I hope everyone had a good holiday
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Brian
I ordered the next batch of LM4780 boards, and have started taking pre-orders for them. I will ship them out as soon as they arrive.
www.chipamp.com
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Brian
www.chipamp.com
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Brian
My e-mail server is down today, so if mails get returned, try sending them again in a few hours.
As for the order status, all current order have been shipped out, with the last batch of LM3886 kits and LM4780 kits going out this morning.
I now have the parts for all of the kits in stock, and am still accepting orders on the website:
http://www.chipamp.com
Now that I am caught up with the kits, I will put more time into getting the instruction manuals finished.
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Brian
As for the order status, all current order have been shipped out, with the last batch of LM3886 kits and LM4780 kits going out this morning.
I now have the parts for all of the kits in stock, and am still accepting orders on the website:
http://www.chipamp.com
Now that I am caught up with the kits, I will put more time into getting the instruction manuals finished.
--
Brian
Banned
Joined 2002
I have now posted a users guide for the LM3886 kit on my website:
http://www.chipamp.com/docs/lm3886.pdf
Sorry for the delay in getting this manual out.
If you have any farther questions, drop me an e-mail, and answer them for you, and work more material into the manual.
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Brian
http://www.chipamp.com/docs/lm3886.pdf
Sorry for the delay in getting this manual out.
If you have any farther questions, drop me an e-mail, and answer them for you, and work more material into the manual.
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Brian
BrianGT said:
Sorry for the mistake in the URL, here is the correct one:
http://www.chipamp.com/docs/lm3886-manual.pdf
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Brian
It has now been 1 year since I started selling these red gainclone pcbs, so I have decided to have a 1 year Anniversary sale:
http://www.chipamp.com/specials.shtml
PCBs are "Buy 2, get 1 free!", effectively 33% off. This will be a limited time offer, so take advantage of this soon.
Details posted on the webpage.
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Brian
http://www.chipamp.com/specials.shtml
PCBs are "Buy 2, get 1 free!", effectively 33% off. This will be a limited time offer, so take advantage of this soon.
Details posted on the webpage.
--
Brian
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