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-   -   A new chip amp project (http://www.diyaudio.com/forums/chip-amps/16055-new-chip-amp-project.html)

JOE DIRT® 5th June 2003 01:49 AM

A new chip amp project
 
I was doing some more unpacking today and ran into a plathora of samples I stuck in a unmarked box...Low and Behold I can across a pair of LM3886TF`s...I forgoit all about receiving them a year ago.....so I looked up the specs on them and they seem pretty good they are part of the Overture line....this works out perfect because I found a pair of STK4042`s also the other day....so thats two amps to build now!!!haha...I am thinking of making a nice surround amp with the 3886`s and maybe a centre channel with the STK`s

Cheers!!The DIRT®

JOE DIRT® 5th June 2003 01:52 AM

:confused:

jleaman 5th June 2003 04:07 AM

ok that is it. i have to ask where do you get samples from in canada as i would like to build the gain clone but no mula right now my plann is to get the chips and start the case and ect and work with the things that i can get for free right now.


where can i get free samples to start my stereo gain clone.

Any one...

JOE DIRT® 5th June 2003 04:26 AM

I got them from National directly.....they still give away samples although you pay shipping now (new rule)....they are sending me 50 bucks worth for 10 bucks....pretty cheap:devily:

Cheers!!The DIRT®

jleaman 5th June 2003 04:52 AM

how do i get a hold of them and get some parts like that so i can build some chip amps. Can you email me how you did it so i can contact them i can pay the shipping but i cant afford parts right now.

carlosfm 9th June 2003 01:23 PM

Hi Joe,

Please don't use a different chip for the centre channel.
You should use the same chip all around.
What kills AV is people having different speakers / amps for front, centre and surround.
Please do it, but choose only one chip type for all channels.

If I were you, I'd choose the LM3886.
It sounds excellent.
BTW, do you need help unpacking?:devily:

JOE DIRT® 16th June 2003 06:32 PM

2 Attachment(s)
I rigged this up on the weekend to start testing the chips...the system is Line isolated with the transformer on the left the toroid and EI* transformer will power the amp....there is a 35 amp bridge on a small heat sink and there are the 2 15 000 uf 80 volt caps


the heat sink is home made....this is all temporary

JOE DIRT® 16th June 2003 06:34 PM

2 Attachment(s)
the Heatsink:

carlosfm 17th June 2003 10:14 AM

JOE,

Are you going to use the LM3886?
What voltages are those transformers?

pinkmouse 17th June 2003 10:48 AM

Quote:

Originally posted by JasonL
how do i get a hold of them and get some parts like that so i can build some chip amps. Can you email me how you did it so i can contact them i can pay the shipping but i cant afford parts right now.
In the belief that anything worthwhile has to involve a little sweat, just go to the National website, (google works), and do some digging. It's all there if you look;)


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