Thermal IR photos of F5...

hartze11 · 14th May 2012, 02:37 AM

Hi all,

I had access to a FLIR thermal imager, and couldn't resist testing various household items.

My F5 is still in "development" and only mounted to a heat sink. Unfortunately, the aluminum doesn't show up very well, since it is so reflective.

and a fellow audiophile...

CanAm Man · 14th May 2012, 03:57 AM

Dat cat's got them voodoo eyes....!!

Too bad we can't see the F5 heatsinks with more definitive detail.........

flg · 10:05 AM

So, I would guess you were looking at an aluminum (natural) surface behind the board? It shows cold. Natural shinny metal surfaces do not reflect proper emissivity for an IR camera. You will need to put something like a spot of thermal silicone goop on the shinny metal and read the temp of the goop. Unless you have black anodizing.
It also looks better if you adjust your low and high Limits to something normal like 25 -85C. Room temp would be black and 85 would be white.

sippy · 14th May 2012, 01:50 PM

that cat needs bigger heatsinks

6L6 · 14th May 2012, 04:02 PM

Neat photos - very interesting!

Could you take a photo of the fin side of the heatsink?

pcb121055 · 14th May 2012, 04:41 PM

Quote:

Originally Posted by sippy

that cat needs bigger heatsinks

flg · 14th May 2012, 04:48 PM

Quote:

Originally Posted by 6L6

Neat photos - very interesting!

Could you take a photo of the fin side of the heatsink?

Yes, as you can see the device is cunducting it's heat to the board via the leads. All around the 3 leads you see yellow(increased temp) but, the soldered, exposed, shinny, metal of the solder joints to the output device appear cold (Black). Not likely, but, unimportant here...
What I do see is a heat producing component to the left of, but just below the level of the tansistor, most likely under the board though? What's that a source R? Only 1?
This is a very good tool for optimising, if you have access to one. Also for deguging problems!

hartze11 · 14th May 2012, 05:44 PM

Quote:

Originally Posted by flg

What I do see is a heat producing component to the left of, but just below the level of the tansistor, most likely under the board though? What's that a source R? Only 1?

That is probably the 0.47 Ohm resistor, R11/R12. They get warm, but are sized appropriately. Both should be visible, but one might be running hotter.

I'll put some silicone goop at various places on the heat sink, and re-image it.

Just for all your information, the heat sink is a 10x12, with 2" fin. I was hoping to get both F5 channels on a heat sink of this size. Right now (for testing purposes) I have a single channel mounted in the center of the right half-side of the heat sink. I don't think it will work, and I'll just stick with one channel per 10x12", unless I got to some active cooling.

hartze11 · 14th May 2012, 05:45 PM

Quote:

Originally Posted by CanAm Man

Dat cat's got them voodoo eyes....!!

Actually, that is the menacing evil trying to escape....

sippy · 14th May 2012, 06:17 PM

Hahaha.......
I have a planter outside my front door, one of the neighbours cats LIKED to relive its self in there, till i doused its 'lurking evil' with a pail or 'holy dishwater'.
......or did it become the first liquid cooled cat?

14th May 2012, 02:37 AM	#1
hartze11 diyAudio Member Join Date: Nov 2008 Location: Boulder, CO	Thermal IR photos of F5... Hi all, I had access to a FLIR thermal imager, and couldn't resist testing various household items. My F5 is still in "development" and only mounted to a heat sink. Unfortunately, the aluminum doesn't show up very well, since it is so reflective. and a fellow audiophile...

14th May 2012, 10:02 AM	#3
flg diyAudio Member Join Date: Jul 2005 Location: North East	So, I would guess you were looking at an aluminum (natural) surface behind the board? It shows cold. Natural shinny metal surfaces do not reflect proper emissivity for an IR camera. You will need to put something like a spot of thermal silicone goop on the shinny metal and read the temp of the goop. Unless you have black anodizing. It also looks better if you adjust your low and high Limits to something normal like 25 -85C. Room temp would be black and 85 would be white. __________________ “Be who you are and say what you feel because those who mind don't matter and those who matter don't mind.” Dr. Seuss Last edited by flg; 14th May 2012 at 10:05 AM.

14th May 2012, 04:02 PM	#5
6L6 diyAudio Member Join Date: Oct 2010 Location: Denver, Colorado	Neat photos - very interesting! Could you take a photo of the fin side of the heatsink? __________________ llustrated Build Guides - Pass Pearl 1 - Pass B1 - - Pass F5 - Pearl 2 - -O2 HPA - - Pass F4

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14th May 2012, 03:57 AM	#2
CanAm Man diyAudio Member Join Date: Sep 2006 Location: Santa Rosa Beach, FL	Dat cat's got them voodoo eyes....!! Too bad we can't see the F5 heatsinks with more definitive detail.........

14th May 2012, 01:50 PM	#4
sippy diyAudio Member Join Date: Jun 2008	that cat needs bigger heatsinks

14th May 2012, 06:17 PM	#10
sippy diyAudio Member Join Date: Jun 2008	Hahaha....... I have a planter outside my front door, one of the neighbours cats LIKED to relive its self in there, till i doused its 'lurking evil' with a pail or 'holy dishwater'. ......or did it become the first liquid cooled cat?

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