Improving Heatsinks

freo · 7th March 2006, 06:24 AM

Hello
has anyone any ideas on how to make heatsinks more efficient, I have a class a amp that runs very hot especially here in the 100 degree Australian summer I thought about sticking the fins of another heatsink into the existing one, or mabeye running some copper wire from the existing heatsinks any ideas would be welcome
Regards Roger

AndrewT · 7th March 2006, 06:39 AM

Hi,
move to the UK.

They will run a lot cooler here.

Particularly in the Scottish Borders where some more snow fell overnight. It's all white again.

sangram · 7th March 2006, 06:44 AM

Quote:

Originally posted by freo
Hello
has anyone any ideas on how to make heatsinks more efficient,

Hi

A 12 Volt fan run at 6 volts (or two connected in series) could halve the heatsink temperature.

Sangram

sangram · 7th March 2006, 06:45 AM

Quote:

Originally posted by AndrewT
... some more snow fell overnight. It's all white again.

I'm jealous!! We're approaching a summer which is supposed to be one of the worst in the subcontinent, with 40 degree temperatures.

Greg Erskine · 7th March 2006, 06:47 AM

hi freo,

Ensure fins are vertical.
Make sure the fins have good air flow.
Make them bigger.
Add a fan or two.
Black heatsinks are better.

regards

AndrewT · 7th March 2006, 07:37 AM

Hi,
ensure the bottom entry of the sink is clear of the floor/support shelf.

The cold (38degC) air needs to get in efficiently before it can get out.

Are the sinks clean - no dust/grime?

Would you consider the fan cooling just mentioned by Snagram & Greg?
Only for summer use.
Build a support frame with a bottom feed fan and an exist slot directly under your sink. Although not in the best location it will reduce your Tc.

AndrewT · 13th March 2006, 09:49 AM

Hi,
he did not understand the subtlety of my offer to take his amp off his hands.

Just an update on the weather.

I can't get to work today (Monday). Still snowed in from Saturday morning's snowfall/drifting.

darkfenriz · 13th March 2006, 11:11 AM

If you have plastic can devices you can use some thin copper blocks, of reasonably greater area than to247, each for every group of devices with the same potential at collector/drain. The trick is to use washer not between device and copper block, but between copper block and aluminium heatsink.
However I bet your heatsink is colder than you'd think. You know, water of 160F won't make you harm, freon of 130F will, and so will aluminium.

7th March 2006, 06:24 AM	#1
freo diyAudio Member Join Date: Dec 2005 Location: fremantle	Improving Heatsinks Hello has anyone any ideas on how to make heatsinks more efficient, I have a class a amp that runs very hot especially here in the 100 degree Australian summer I thought about sticking the fins of another heatsink into the existing one, or mabeye running some copper wire from the existing heatsinks any ideas would be welcome Regards Roger

7th March 2006, 06:39 AM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, move to the UK. They will run a lot cooler here. Particularly in the Scottish Borders where some more snow fell overnight. It's all white again. __________________ regards Andrew T.

7th March 2006, 06:47 AM	#5
Greg Erskine diyAudio Member Join Date: Jan 2002 Location: Sydney/Australia	hi freo, Ensure fins are vertical. Make sure the fins have good air flow. Make them bigger. Add a fan or two. Black heatsinks are better. regards __________________ Greg Erskine

7th March 2006, 07:37 AM	#6
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, ensure the bottom entry of the sink is clear of the floor/support shelf. The cold (38degC) air needs to get in efficiently before it can get out. Are the sinks clean - no dust/grime? Would you consider the fan cooling just mentioned by Snagram & Greg? Only for summer use. Build a support frame with a bottom feed fan and an exist slot directly under your sink. Although not in the best location it will reduce your Tc. __________________ regards Andrew T.

13th March 2006, 09:49 AM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, he did not understand the subtlety of my offer to take his amp off his hands. Just an update on the weather. I can't get to work today (Monday). Still snowed in from Saturday morning's snowfall/drifting. __________________ regards Andrew T.


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13th March 2006, 11:11 AM	#8
darkfenriz diyAudio Member Join Date: Jun 2004 Location: Warsaw	If you have plastic can devices you can use some thin copper blocks, of reasonably greater area than to247, each for every group of devices with the same potential at collector/drain. The trick is to use washer not between device and copper block, but between copper block and aluminium heatsink. However I bet your heatsink is colder than you'd think. You know, water of 160F won't make you harm, freon of 130F will, and so will aluminium.

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