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Old 14th May 2012, 02:37 AM   #1
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Default 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.

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and a fellow audiophile...

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Old 14th May 2012, 03:57 AM   #2
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Dat cat's got them voodoo eyes....!!

Too bad we can't see the F5 heatsinks with more definitive detail.........
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Old 14th May 2012, 10:02 AM   #3
flg is offline flg  United States
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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.
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Last edited by flg; 14th May 2012 at 10:05 AM.
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Old 14th May 2012, 01:50 PM   #4
sippy is offline sippy  United Kingdom
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that cat needs bigger heatsinks
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Old 14th May 2012, 04:02 PM   #5
6L6 is offline 6L6  United States
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Neat photos - very interesting!

Could you take a photo of the fin side of the heatsink?
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Old 14th May 2012, 04:41 PM   #6
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Originally Posted by sippy View Post
that cat needs bigger heatsinks
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Old 14th May 2012, 04:48 PM   #7
flg is offline flg  United States
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Originally Posted by 6L6 View Post
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!
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Old 14th May 2012, 05:44 PM   #8
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Quote:
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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.
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Old 14th May 2012, 05:45 PM   #9
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Dat cat's got them voodoo eyes....!!
Actually, that is the menacing evil trying to escape....
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Old 14th May 2012, 06:17 PM   #10
sippy is offline sippy  United Kingdom
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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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