Looking for Heatsinks

HipoFutura · 24th August 2006, 01:42 AM

I'm collecting the parts I'll need to complete my new amp. I've been unable to find heatsinks that fit my requirements. I'm looking for something similar to what Nakamichi used in the PA-7. Doesn't have to be exact, just the general shape and size. It will be part of the structural integrity of the case I'm building.

I've done quite a bit of searching on the web, but as yet haven't found anything suitable. I have found some that are close, but don't have the perpendicular ledge on the back that the transistors attach to.

Don

BobEllis · 24th August 2006, 02:49 AM

www.conradheatsinks.com has them. Cost effective to ship from Australia, even by air.

Unless you're using TO-3 devices there isn't much reason to use the flanges, though. Conrad has a nice flat back series.

bigpanda · 24th August 2006, 09:49 AM

I have got some like in the attach photo.

Height : 5cm (fin height)
Width : 20, 25, 30cm (from left to right of photo)
Depth : cut according to your specification
base thickness : 5mm

The one in photo has 19 fins along the width of 25cm and is not flanged.

If this may fit your application, sent me an email.

tony_chan_cf@email.com

HipoFutura · 24th August 2006, 01:12 PM

Bob, thanks for the lead! This is actually the company that Aussie Amps recommends. They have a heatsink that should work. Doesn't look as nice as the Nakimichi, but will suffice.

Bigpanda, thanks for the offer. At this point It looks like I'm going with Conrad.

WillemFick · 24th August 2006, 01:44 PM

I make use of Semikron. They sell heatsink offcuts (anything shorter than 120mm is an offcut!) for whatever the scrap metal equivalent value is. See if there isn't a branch near you!

Semikron Heatsink Catalogue

Warm regards!

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24th August 2006, 02:49 AM	#2
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	www.conradheatsinks.com has them. Cost effective to ship from Australia, even by air. Unless you're using TO-3 devices there isn't much reason to use the flanges, though. Conrad has a nice flat back series.

24th August 2006, 01:12 PM	#4
HipoFutura diyAudio Member Join Date: Jun 2006	Bob, thanks for the lead! This is actually the company that Aussie Amps recommends. They have a heatsink that should work. Doesn't look as nice as the Nakimichi, but will suffice. Bigpanda, thanks for the offer. At this point It looks like I'm going with Conrad.

24th August 2006, 01:44 PM	#5
WillemFick diyAudio Member Join Date: Dec 2005 Location: Johannesburg	I make use of Semikron. They sell heatsink offcuts (anything shorter than 120mm is an offcut!) for whatever the scrap metal equivalent value is. See if there isn't a branch near you! Semikron Heatsink Catalogue Warm regards!

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