Suitable Heatsink for 3886?

transducer · 30th September 2003, 06:29 PM

I need to build an 8 channel amplifier for my active dipole speaker. I just picked up 8 of these heatsinks, measures 9.25x4.4x0.5" each. Is one of these heatsinks sufficient for a single channel of LM3886 at around 50watts?

Second question is an asthetic one. I had originally thought of placing all 8 channels into 1 chassis, all paralleled in a row. I've got an appropriate chassis cover from an Anthem tube amp, I'd need to put together a front, rear and bottom for it. Or I could build two seperate chassis' and make them look something like the original Pass Aleph amps. What do you guys think would make more sense from a wiring and layout perspective?

transducer · 30th September 2003, 06:30 PM

Measurement is 4.5" high.

Here's a shot of just a single heatsink.

seangoesbonk · 30th September 2003, 07:21 PM

Did you get that at Princess Auto?

I've used this one for 2 LM3886s at 40w each and it barely gets warm. http://www.bgmicro.com/prodinfo.asp?...t+sink&stype=3

I can't imagine your sink getting too hot with just one IC on it.

jleaman · 30th September 2003, 07:25 PM

transducer your not burning a music cd with your burner are you : O )

woot a apple user :" O )

transducer · 30th September 2003, 07:32 PM

Sean: yes, I got them at Princess

Only $69 all in for 8 of them, thought it would be a good deal.

Jason, yup, that's an original TiBook on my desk. But I deny all knowledge of burning any music disks

Guess I'm good for 8 channels, maybe more

I might try some parallel combinations for the woofers.

Cheers,
RonS

jleaman · 30th September 2003, 07:34 PM

yup i know what it is. used to have one the 400 mhz with 1-gig memory and dvd drive. i called it a hot pad as it got to hot to have on your lap..

i'm selling my 1 gig tower that i have 2003 model 3 months old to get the new 15" aluminum pb : O )

transducer · 30th September 2003, 07:46 PM

Yes, mine is the original 400Mhz model. I've uped the ram to 768M, and put in a CD-RW in place of the DVD rom. I need to burn disks for work (photographer).

I had sort of tried to dump it in anticipation of getting a new powerbook, but got no reasonable bites. I'm lusting after a new G5, but am waiting for the second coming. I got burned a bit on a first generation G3 that doesn't properly support more than one HD.

Back to audio now

Cheers,
RonS

jleaman · 30th September 2003, 07:49 PM

email me ..

jasonleaman @ shaw. ca

Matttcattt · 30th September 2003, 08:49 PM

Quote:

Originally posted by JasonL
transducer your not burning a music cd with your burner are you : O )

woot a apple user :" O )

Quote:

Originally posted by JasonL
yup i know what it is. used to have one the 400 mhz with 1-gig memory and dvd drive. i called it a hot pad as it got to hot to have on your lap..

i'm selling my 1 gig tower that i have 2003 model 3 months old to get the new 15" aluminum pb : O )

Quote:

Originally posted by JasonL
email me ..

jasonleaman @ shaw. ca

no offence, but do you ever post anything useful or on-topic?

jleaman · 30th September 2003, 09:17 PM

yeah lots of time.

30th September 2003, 07:21 PM	#3
seangoesbonk diyAudio Member Join Date: Jan 2002 Location: Vancouver, BC, Canada	Did you get that at Princess Auto? I've used this one for 2 LM3886s at 40w each and it barely gets warm. http://www.bgmicro.com/prodinfo.asp?...t+sink&stype=3 I can't imagine your sink getting too hot with just one IC on it. __________________ My girlfriend's sub is bigger than mine...

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30th September 2003, 07:25 PM	#4
jleaman Banned Join Date: Apr 2002	transducer your not burning a music cd with your burner are you : O ) woot a apple user :" O )

30th September 2003, 07:32 PM	#5
transducer diyAudio Member Join Date: Mar 2002 Location: Toronto, Canada	Sean: yes, I got them at Princess Only $69 all in for 8 of them, thought it would be a good deal. Jason, yup, that's an original TiBook on my desk. But I deny all knowledge of burning any music disks Guess I'm good for 8 channels, maybe more I might try some parallel combinations for the woofers. Cheers, RonS

30th September 2003, 07:34 PM	#6
jleaman Banned Join Date: Apr 2002	yup i know what it is. used to have one the 400 mhz with 1-gig memory and dvd drive. i called it a hot pad as it got to hot to have on your lap.. i'm selling my 1 gig tower that i have 2003 model 3 months old to get the new 15" aluminum pb : O )

30th September 2003, 07:46 PM	#7
transducer diyAudio Member Join Date: Mar 2002 Location: Toronto, Canada	Yes, mine is the original 400Mhz model. I've uped the ram to 768M, and put in a CD-RW in place of the DVD rom. I need to burn disks for work (photographer). I had sort of tried to dump it in anticipation of getting a new powerbook, but got no reasonable bites. I'm lusting after a new G5, but am waiting for the second coming. I got burned a bit on a first generation G3 that doesn't properly support more than one HD. Back to audio now Cheers, RonS

30th September 2003, 07:49 PM	#8
jleaman Banned Join Date: Apr 2002	email me .. jasonleaman @ shaw. ca

30th September 2003, 09:17 PM	#10
jleaman Banned Join Date: Apr 2002	yeah lots of time.

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