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Chip Amps Amplifiers based on integrated circuits

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Old 18th September 2008, 02:01 AM   #11
bego2 is offline bego2  Croatia
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sorry, where did you get the boards/shematic/kit? thanks.

nice work. im looking for the same amp for subs with lm3886.
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Old 18th September 2008, 02:53 AM   #12
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bego2. i designed them with the help of Randy M Rubin.

there are no other boards other then a few he kept and the ones i have. i may consider selling some if your interested?

keep in mind, most of the amp is the BPA-200 with servos but the other small part is a 50w single LM3886. and theres probably other boards out there that are far easier to mount. mine have the chips UNDER the board facing outward.
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Old 18th September 2008, 02:56 AM   #13
troystg is offline troystg  United States
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Quote:
Originally posted by thetube0a3
lineup : now that you saw what the amp actaully looks like what do you think of it? its my first amp.

I'm not lineup, but I think it looks quite good. Have spares you want to sell? PCB's that is, not assembled units.

For a "first" amp that is very nice. For a tenth amp that is STILL very nice.

Wife won't let you buy any parts!!! JOKING!!!
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Old 18th September 2008, 03:15 AM   #14
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i do have extras but honestly id have no idea what to charge.

the 200W part worked perfectly right off.
while the single lm3886 has needed tweaking, so theres 2 empty sets of pads, and 2 sets of jumpered pads.. and the part i hate right now. the 2.2uf cap stuffed in with a 1k resistor in the feedback loop to get rid of the offset so i could direct couple to my tweeters.

ill take some pictures when its totally done. would you want crossoverboards also? or just amplifier boards?

i have the 12db LR and the 24db LR, but the amplifiers can be operated without them.
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Old 18th September 2008, 03:48 AM   #15
troystg is offline troystg  United States
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If the xo brds are "daughter modules" that plug in then yes please.

preferably the 24db but I surely won't be choosy.

You could most likely offer a group buy on these and recop your complete cost on the design and manufacture.

Not to mention make a LOT of people happy.
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Old 18th September 2008, 08:15 AM   #16
bego2 is offline bego2  Croatia
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Quote:
Originally posted by thetube0a3
bego2. i designed them with the help of Randy M Rubin.

there are no other boards other then a few he kept and the ones i have. i may consider selling some if your interested?

keep in mind, most of the amp is the BPA-200 with servos but the other small part is a 50w single LM3886. and theres probably other boards out there that are far easier to mount. mine have the chips UNDER the board facing outward.

ok. well i cant find any other shematic with layout...what price and would be a problem, i`m in croatia?
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Old 22nd November 2008, 10:22 PM   #17
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finally both speakers are almost finished. both are in daily use. the only thing left is i need to buy some fiberglass insulation to stuff them with. on the bench at clipping the rear panel got plenty warm yet the chips didnt get too hot. so im happy about that, everything tested perfectly in the end. out of everyting the hardest part was getting the bars of aluminum milled, drilled and counter bored.



here are some pictures, from both before the new amplifiers and after. one picture shows after i rebuilt one of the orignal amplifiers and had the cabinet full of polyfill, this didnt last long as i learned it was flammable and removed it immidiately. the amplifier in the picture is still working to this day, i sold it to someone online.


anywho let me know what you think

http://picasaweb.google.com/thetube0...y=fUii9BtmX3w#
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Old 2nd October 2011, 08:19 PM   #18
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I know it's an old thread....

But I just wanted to say Helluva Job! That is a gold plated solution to the problem and I do mean that in the most complimentary way!


Now if you could make some more of those PC boards.....
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Old 22nd February 2012, 04:02 AM   #19
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Quote:
Originally Posted by dcsleeper View Post
I know it's an old thread....

But I just wanted to say Helluva Job! That is a gold plated solution to the problem and I do mean that in the most complimentary way!


Now if you could make some more of those PC boards.....

Thanks for the compliment!

I have quite a few PCBs left over and have considered selling them cheap if anyone is interested. Just keep in mind its almost all SMD.
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