Upright Heat sinks for f5

thunk303 · 1st February 2011, 01:46 AM

I know this has been asked a few hundred times, but hey... I really want to build a tall narrow chassis for my f5, I know upright is less efficient and therefor more expensive but I cant help myself.

Nelson says:

At 1.3 amps per channel, you will see idle heat dissipation of 62 watts. To keep the temperature rise of the heat sink to 20 deg C. above the ambient temperature, you will want a heat sink rated at about .6 deg C./watt for each transistor. An example of this would be a chunk of finned aluminum, with a series of 2” fins attached to an 8” by 6” base. You will need two per channel.

So for 1 channel I would need a 2"D x 6"W x 16"H with at least a 1/4" plate
as a minimum size.

Does anybody know of a supplier of this type of design/dimensions or an alternative that I might build myself??

Can I stack smaller sinks and link them somehow?

I am open to any suggestions no matter how weird.

Cheers all
Dean

thunk303 · 1st February 2011, 12:15 PM

Is it possible to use something like this

Conrad Heatsinks - Products

Perhaps the MF35-100?

Standing upright, with the fins running horizontally? Surely this is a bad idea

weskoki · 1st February 2011, 12:50 PM

Hi i have used MF35-151.5 on my F5 with no overheating issues at all.

Wes

thunk303 · 1st February 2011, 01:02 PM

Nice Wes, have you tried it standing up with the fins running horizontally?

weskoki · 1st February 2011, 01:14 PM

No,make shore you buy the biggest heatsinks from Conrad.Mine didn't even get hot to touch.

thunk303 · 2nd February 2011, 02:31 AM

I'll keep this open just in case someone who has tried their horizontal heat sinks running vertically has some sort of advice or measurements.

Look forward to any comments, cant find much using google, mainly PC related.

Apex Jr · 2nd February 2011, 02:55 AM

Check out this thread...

FS: F5 Heatsinks

Steve @ Apex Jr.

thunk303 · 2nd February 2011, 03:19 AM

Cheers Apex.

Just found this really cool Java HEATSINK APP:

Natural convection heat sink

thunk303 · 2nd February 2011, 05:25 AM

Just found this at the ESP site, basically says horizontal fins is a crap idea.... Back to the drawing board.

ESP - Heatsink design and transistor mounting

thunk303 · 2nd February 2011, 09:31 AM

Does anybody have a supply or supplier of heat sinks roughly like:

100mmW x 50mmD x 300mmH with the fins running vertically?

C'mon, just for laughs

Anybody, Bueller ???

1st February 2011, 01:46 AM	#1
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	Upright Heat sinks for f5 I know this has been asked a few hundred times, but hey... I really want to build a tall narrow chassis for my f5, I know upright is less efficient and therefor more expensive but I cant help myself. Nelson says: At 1.3 amps per channel, you will see idle heat dissipation of 62 watts. To keep the temperature rise of the heat sink to 20 deg C. above the ambient temperature, you will want a heat sink rated at about .6 deg C./watt for each transistor. An example of this would be a chunk of finned aluminum, with a series of 2” fins attached to an 8” by 6” base. You will need two per channel. So for 1 channel I would need a 2"D x 6"W x 16"H with at least a 1/4" plate as a minimum size. Does anybody know of a supplier of this type of design/dimensions or an alternative that I might build myself?? Can I stack smaller sinks and link them somehow? I am open to any suggestions no matter how weird. Cheers all Dean

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1st February 2011, 12:15 PM	#2
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	Is it possible to use something like this Conrad Heatsinks - Products Perhaps the MF35-100? Standing upright, with the fins running horizontally? Surely this is a bad idea

1st February 2011, 12:50 PM	#3
weskoki diyAudio Member Join Date: Aug 2009	Hi i have used MF35-151.5 on my F5 with no overheating issues at all. Wes

1st February 2011, 01:02 PM	#4
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	Nice Wes, have you tried it standing up with the fins running horizontally?

1st February 2011, 01:14 PM	#5
weskoki diyAudio Member Join Date: Aug 2009	No,make shore you buy the biggest heatsinks from Conrad.Mine didn't even get hot to touch.

2nd February 2011, 02:31 AM	#6
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	I'll keep this open just in case someone who has tried their horizontal heat sinks running vertically has some sort of advice or measurements. Look forward to any comments, cant find much using google, mainly PC related.

2nd February 2011, 02:55 AM	#7
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	Check out this thread... FS: F5 Heatsinks Steve @ Apex Jr.

2nd February 2011, 03:19 AM	#8
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	Cheers Apex. Just found this really cool Java HEATSINK APP: Natural convection heat sink

2nd February 2011, 05:25 AM	#9
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	Just found this at the ESP site, basically says horizontal fins is a crap idea.... Back to the drawing board. ESP - Heatsink design and transistor mounting

2nd February 2011, 09:31 AM	#10
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	Does anybody have a supply or supplier of heat sinks roughly like: 100mmW x 50mmD x 300mmH with the fins running vertically? C'mon, just for laughs Anybody, Bueller ???

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