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Old 5th November 2003, 01:47 AM   #1
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Default Where to purchase heatsinks

I'm researching building an amplifier (or, perhaps 4 - I'm considering building a Linkwitz Orion loudspeaker) and I'm not having much success with sourcing heatsinks. Does anyone have a vendor in the US that they've purchased from? If shipping isn't prohibitive, I'd consider vendors located elsewhere as well.

Thanks.

Paul Ebert
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Old 5th November 2003, 05:21 AM   #2
EE_Mark is offline EE_Mark  United States
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Default Heatsink cost

What is your budget? I just purchased some monster heatsinks but I paid a bundle for them, and then I spent even more having them black anodized. The heatsinks I bought are 7 inches tal by 14 inches deep with fins that protrude 3 inches. They are made out of 6063-T5 which is more thermally conductive than standard 6061 aluminum. I think I paid about $120 each (I bought 4). What is your budget, what size do you want, what kind of power do you need to dissipate, etc.?
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Old 5th November 2003, 05:47 AM   #3
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Did you see this: Heatsinks

Also, try Apex Jr.

Some heat sink info is in this thread as well: http://www.diyaudio.com/forums/showt...4427#post94427
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Old 5th November 2003, 01:00 PM   #4
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Electronic Surplus in Cleveland

http://www.electronicsurplus.com/com...=1068040619131

has quite a few heatsinks in stock. I have some 11X4X1.25" which were $12 ea.

Before purchasing any heat sinks you should read the white papers on Thermalloy Aavid's website, and as I pointed out a few days ago, they have a Thermal Transfer Calculator at:

http://www.aavidthermalloy.com/technical/thermal.shtml
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Old 5th November 2003, 03:32 PM   #5
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Thanks for the info!

My budget? Hmm, well I'm trying to determine if I can build eight channels of around 60 watts each that will either sound better or be cheaper than buying an inexpensive commercial multichannel amp. I figure the commercial unit would cost about $1800, though I might have to limit myself to seven channels (of which I would use 6). These are to power a pair of Linkwitz Orion speakers (my dream project).

I'm currently considering building 4 ESP P3A amps. I am also considering some of the AKSA products. I'm certainly open to other suggestions, but I've reluctantly ruled out the Aleph series since it would generate too much heat.

If I build the P3A I would need 1 C/W, according to the website. I would run the amp to put out about 60 watts, but I do not know how much wattage is generated as heat. I guess I would like a sink that's about the same size as the PC board - roughly 3" x 6". Wider would be OK, but 12" x 12" seems too big (but, thanks Pete).

Thanks again for the reponses. I'll keep my eye open for surplus stock. BTW, I was not able to access the R-Theta website. It contained text that looked like the source for an HTML file or something. What's up with that?

Paul
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Old 5th November 2003, 03:38 PM   #6
EE_Mark is offline EE_Mark  United States
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Default Heatsinks

Those 12" by 12" heatsinks looked like a good price if there are any left. Do you have access to a bandsaw?
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Old 5th November 2003, 04:00 PM   #7
Apex Jr is offline Apex Jr  United States
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Default Heatsink Source

In this thread I still have all the heat sinks that are not
listed on the website. All that were put aside didn't
get sold;

Good inexpensive heatsink source?

Steve @ Apex Jr
www.apexjr.com
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Old 28th November 2003, 11:00 PM   #8
name773 is offline name773  United States
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surplus sales of nebraska
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Old 29th November 2003, 03:52 PM   #9
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sorry to hijack the thread :P

does anyone know of a cheap place for heatsinks in the UK? preferably the SW.

like the ones EE mark described, if possible. (~6" by 12" or bigger)
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Old 29th November 2003, 04:41 PM   #10
EE_Mark is offline EE_Mark  United States
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Default Heatsinks in the UK

Quote:
Originally posted by Matttcattt
sorry to hijack the thread :P

does anyone know of a cheap place for heatsinks in the UK? preferably the SW.

like the ones EE mark described, if possible. (~6" by 12" or bigger)
I bought mine at Richardson:

Richardson Electronics Limited
226 Berwick Avenue
Slough, Berks. SL1 4QT
England Phone: +44 (01753) 733010
FAX: +44 (01753) 733012

Internet: http://www.rell.com/International/UK.asp

2. Richardson Electronics Limited
Inspring House
Searby Road
Lincoln LN2 4DT
England
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