In need of a lrage heatsink for my chip amp, any ideas where to get one?

Boscoe · 12th July 2010, 07:57 PM

For my design of an enclosure which will be custom the heatsinks will make up the sides and then the top, bottom, front and back panels will be attached to them. The problem is I haven't been able to find any heatsinks the right size in the UK for a reasonable price. I need it in the style of the image below but need it 260mm long, 75mm high and 30mm thick, I don't want the extra ridges on the fins though and would prefer it in black. I also need it from the UK or europe at least.

Thanks
Boscoe

firechief · 12th July 2010, 09:34 PM

Boscoe -Oh you absolutly have to have it in UK or europe? Ill bet shipping won't be that bad. There is a guy who advertises in the manufacturers section of this froum HeatsinkUSA, llc . Now I haven't had any dealings with him, but it's a place to start. How much from vendors out your way, what does a thing like that cost? Do you have an idea what the weight would be?

AndrewT · 13th July 2010, 11:01 AM

That pic looks similar to a 200*100*50 heatsink I have. It is about 0.55C/W

That is very big for a chipamp.

Your 260*75*30 proposal is also very big for a chipamp.

What size does National say you should use for your implementation?

I recommend doubling National's guide figure.

Boscoe · 13th July 2010, 11:12 AM

It will be for 6 LM3886's and I meant 40mm depth, sorry typo.

Thanks.

AndrewT · 13th July 2010, 11:14 AM

what does National's guide say?

Boscoe · 13th July 2010, 11:19 AM

In the absoulute maximum ratings...........

Thermal Resistance:

θJC 1°C/W
θJA 43°C/W

Not quite sure waht this means though.

AndrewT · 13th July 2010, 11:21 AM

page 14.
Maximum Heatsink Thermal Resistance

Have you read and/or implemented that?

Mooly · 13th July 2010, 11:24 AM

This is for Vellemans 200 watt amp,
VELLEMAN KIT|HSVM100|HEAT SINK FOR K8060 | CPC

tangmonster · 13th July 2010, 11:34 AM

rather go for this one:

AAVID THERMALLOY | Semiconductors | Sockets and Heatsinks | Heat Sinks | Thermal Resistance - up to 1.3°C/W |EM/B/75

MUCH more metal and biger than velleman for more or less the same price. I used two of them in my current build ( see picture thread)

jimbo1968 · 13th July 2010, 12:54 PM

Qty2
250x150x30 1.3kg 8mm back panel.

£20+£8 post

12th July 2010, 07:57 PM	#1
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	In need of a lrage heatsink for my chip amp, any ideas where to get one? For my design of an enclosure which will be custom the heatsinks will make up the sides and then the top, bottom, front and back panels will be attached to them. The problem is I haven't been able to find any heatsinks the right size in the UK for a reasonable price. I need it in the style of the image below but need it 260mm long, 75mm high and 30mm thick, I don't want the extra ridges on the fins though and would prefer it in black. I also need it from the UK or europe at least. Thanks Boscoe

13th July 2010, 11:01 AM	#3
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	That pic looks similar to a 20010050 heatsink I have. It is about 0.55C/W That is very big for a chipamp. Your 2607530 proposal is also very big for a chipamp. What size does National say you should use for your implementation? I recommend doubling National's guide figure. __________________ regards Andrew T.

13th July 2010, 11:14 AM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	what does National's guide say? __________________ regards Andrew T.

13th July 2010, 11:21 AM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	page 14. Maximum Heatsink Thermal Resistance Have you read and/or implemented that? __________________ regards Andrew T.

13th July 2010, 11:24 AM	#8
Mooly diyAudio Member Join Date: Sep 2007	This is for Vellemans 200 watt amp, VELLEMAN KIT\|HSVM100\|HEAT SINK FOR K8060 \| CPC __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*


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12th July 2010, 09:34 PM	#2
firechief diyAudio Member Join Date: Sep 2008 Location: Near Seattle Wa	Boscoe -Oh you absolutly have to have it in UK or europe? Ill bet shipping won't be that bad. There is a guy who advertises in the manufacturers section of this froum HeatsinkUSA, llc . Now I haven't had any dealings with him, but it's a place to start. How much from vendors out your way, what does a thing like that cost? Do you have an idea what the weight would be?

13th July 2010, 11:12 AM	#4
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	It will be for 6 LM3886's and I meant 40mm depth, sorry typo. Thanks.

13th July 2010, 11:19 AM	#6
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	In the absoulute maximum ratings........... Thermal Resistance: θJC 1°C/W θJA 43°C/W Not quite sure waht this means though.

13th July 2010, 11:34 AM	#9
tangmonster diyAudio Member Join Date: Jul 2007 Location: Cape Town	rather go for this one: AAVID THERMALLOY \| Semiconductors \| Sockets and Heatsinks \| Heat Sinks \| Thermal Resistance - up to 1.3°C/W \|EM/B/75 MUCH more metal and biger than velleman for more or less the same price. I used two of them in my current build ( see picture thread)

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