Heatsink for 8-DIP Opamp

arupg · 12th August 2007, 08:00 PM

Can someone help me find a heatsink for clipping on the 8-DIP opamp that I've biased to Class-A and now needs a suitable heatsink.

Thanks!

Conrad Hoffman · 12th August 2007, 08:28 PM

Thermalloy, now Aavid, used to have clip-ons for the longer DIPs, not sure about 8-pin though. They also had little finned extrusions the size of the top of the chip, that you'd just epoxy on. If I need to heat sink an IC, I just cut out a small piece of aluminum, bend it into a U shape, and epoxy it on. If there's space around the chip, sometimes just a simple flat plate will do the trick.

hihopes · 12th August 2007, 08:37 PM

I got some stick-on ones from Avnet (who seem to have offices all over the world, though some with slightly different names). They are actually for longer ic's - 14 pin, I think, but I just cut them in half and they fit an 8 pin dip beautifully.

KP11520 · 13th August 2007, 02:49 AM

Hi arupg,

Was this done on an Amp, Preamp or CD Player?
Can you share the details of what op amp(s) and the method you used to bias the op amp(s). Any test measurements that you used and what impact on the difference of what you heard would also be interesting!

Thank you!

Regards//keith

jacco vermeulen · 13th August 2007, 07:06 AM

dip-8 is too small for a clip-on.
Fischer ICK-L is an adhesive type, used with thermal conducting tape.

arupg · 13th August 2007, 07:22 AM

Hi Conrad Hoffman & hihopes:

Thanks for the lead. Much appreciated!!

--------------------------

Hi Keith:

My Opamp that I biased into Class-A operation is in a Digital-to-Analog Processor; Audio Alchemy Dac-in-the-box (DITB).
Please read my post
Which Opamp Do U suggest ??

Most of your answers are there.

Cheers!

------------------
Arup

arupg · 13th August 2007, 08:14 AM

I did manage to locate the perfect item that I was looking for. Its a 8-DIP clip-on.

Please see this link:

http://www.aavidthermalloy.com/cgi-b...=580100b00000g

Now, where do I find this??

jacco vermeulen · 13th August 2007, 01:10 PM

30 C/W, WOW !
I'd like me some of those too.
Mouser says non-stocked, 3000 number orders.

peranders · 13th August 2007, 01:15 PM

Quote:

Originally posted by arupg
Can someone help me find a heatsink for clipping on the 8-DIP opamp that I've biased to Class-A and now needs a suitable heatsink.

Thanks!

Just wondering, but how much have you bias the opamp really? Do you know how to calculate minimum required current? Give me this data:

Supply voltage
Load
Max output voltage for REAL signals

theAnonymous1 · 13th August 2007, 01:22 PM

They are available in single units at Arrow Electronics.....

http://www.arrownac.com/aws/pg_webc/...=click_through

There is a $10 international order fee on top of the normal shipping fees. If you two twist my arm enough maybe I will put in an order for some and ship them to you myself.

12th August 2007, 08:00 PM	#1
arupg diyAudio Member Join Date: Dec 2005 Location: India	Heatsink for 8-DIP Opamp Can someone help me find a heatsink for clipping on the 8-DIP opamp that I've biased to Class-A and now needs a suitable heatsink. Thanks!

13th August 2007, 02:49 AM	#4
KP11520 diyAudio Member Join Date: Apr 2007	Hi arupg, Was this done on an Amp, Preamp or CD Player? Can you share the details of what op amp(s) and the method you used to bias the op amp(s). Any test measurements that you used and what impact on the difference of what you heard would also be interesting! Thank you! Regards//keith __________________ If Wile E. Coyote had enough money to buy all that ACME ****, why didn't he just buy dinner?

13th August 2007, 07:06 AM	#5
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	dip-8 is too small for a clip-on. Fischer ICK-L is an adhesive type, used with thermal conducting tape. __________________ Looks like Sponge Bob has killed another thread.

13th August 2007, 01:10 PM	#8
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	30 C/W, WOW ! I'd like me some of those too. Mouser says non-stocked, 3000 number orders. __________________ Looks like Sponge Bob has killed another thread.

13th August 2007, 01:22 PM	#10
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	They are available in single units at Arrow Electronics..... http://www.arrownac.com/aws/pg_webc/...=click_through There is a $10 international order fee on top of the normal shipping fees. If you two twist my arm enough maybe I will put in an order for some and ship them to you myself. __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

12th August 2007, 08:28 PM	#2
Conrad Hoffman diyAudio Member Join Date: Mar 2007 Location: Canandaigua, NY USA	Thermalloy, now Aavid, used to have clip-ons for the longer DIPs, not sure about 8-pin though. They also had little finned extrusions the size of the top of the chip, that you'd just epoxy on. If I need to heat sink an IC, I just cut out a small piece of aluminum, bend it into a U shape, and epoxy it on. If there's space around the chip, sometimes just a simple flat plate will do the trick.

12th August 2007, 08:37 PM	#3
hihopes diyAudio Member Join Date: Sep 2004 Location: Cape Town	I got some stick-on ones from Avnet (who seem to have offices all over the world, though some with slightly different names). They are actually for longer ic's - 14 pin, I think, but I just cut them in half and they fit an 8 pin dip beautifully.

13th August 2007, 07:22 AM	#6
arupg diyAudio Member Join Date: Dec 2005 Location: India	Hi Conrad Hoffman & hihopes: Thanks for the lead. Much appreciated!! -------------------------- Hi Keith: My Opamp that I biased into Class-A operation is in a Digital-to-Analog Processor; Audio Alchemy Dac-in-the-box (DITB). Please read my post Which Opamp Do U suggest ?? Most of your answers are there. Cheers! ------------------ Arup

13th August 2007, 08:14 AM	#7
arupg diyAudio Member Join Date: Dec 2005 Location: India	I did manage to locate the perfect item that I was looking for. Its a 8-DIP clip-on. Please see this link: http://www.aavidthermalloy.com/cgi-b...=580100b00000g Now, where do I find this??

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