hello. i'm starting F5 turbo v3 now.
i'm loocked at heatsinks USA's 10.80" profiles. 6" high.
so 20x6" pr side. i need to desepate around 200w pr channel.
the sinks can't do the job by themself. i need some heattrnasfer🙂
what to use? 10mm copper? or just move the center outputs outside of the boards? one of 2🙂
i'm loocked at heatsinks USA's 10.80" profiles. 6" high.
so 20x6" pr side. i need to desepate around 200w pr channel.
the sinks can't do the job by themself. i need some heattrnasfer🙂
what to use? 10mm copper? or just move the center outputs outside of the boards? one of 2🙂
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Yea, This is why we have that single mosfet boards for F5T....
I bought some copper bar from McMaster.com for spreader, but they are (being copper) expensive....
I bought some copper bar from McMaster.com for spreader, but they are (being copper) expensive....
i know. but i don't want 9 boards pr monoblock and 1km cable🙂
yes. copper is expensive. thats why i tinking of moving the 2 center mosfets out of the board🙂
yes. copper is expensive. thats why i tinking of moving the 2 center mosfets out of the board🙂
A 200 watt / ch class-a amp bias will pull 1600 watts at idle , I had one... Personally I don't see any reason to have one again , 50 - 80 watts class-a /ch will do thank you ....
read my first post one more time.
first off. they are monoblocks.
there is not 200w output.
and 4 times dissepation on idle. not very likely in a F5.
first off. they are monoblocks.
there is not 200w output.
and 4 times dissepation on idle. not very likely in a F5.
For V3 i would be looking at 8-10" minimum length. 20" depth. Will still be hot. What do your boards look like? Look at PassLabs for ideas of size in comparison to power.
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it is uktoecutter's boards. and the sinks is fine.
same as i use for my F5 with 30% higher bias. that one draws 100W pr ch.
and it can do much more if i can spread the heat better.
same as i use for my F5 with 30% higher bias. that one draws 100W pr ch.
and it can do much more if i can spread the heat better.
V3 will dissipate 240w per channel. With only 30V+/- rails. That is a lotof heat. 6" inches is going to be too little i believe based on my experience with their sinks.
that is up to everyone to decide 🙂 mine will be around 200W with +/-42-45V.
so same as 2ch of my F5 that use the same sinks 🙂
so same as 2ch of my F5 that use the same sinks 🙂
I'm not getting you , maybe you need to be more specific about your position ...
Are you going to have 200 watt of class-a bias / ch , if so then the amplifiers will be drawing 1600 watts or very close to it .
it is monoblocks. and no. 200W is not the output power.
200w dissepation.
how do you come up with 1600w?
if you want 200w output i class A, they will draw around 500W pr monoblock. not 1600w.
200w dissepation.
how do you come up with 1600w?
if you want 200w output i class A, they will draw around 500W pr monoblock. not 1600w.
get a pair of those 6" high heatsinks and a 14" high version.
Bolt the two 6" to the back of the 14" leaving a horizontal gap of ~2" between.
Fit the F5T into that gap.
This should adequately cool your proposed monoblock amp.
You could reduce the height of the heatsinks below the F5T. Maybe 3" at bottom, 6" at top and 11" joining them.
Alternatively mount the 6" heatsinks back to back with a 1" vertical gap between them.
Mount half the Ns and half the Ps to one sink.
Mount the remaining Ns & Ps to the other sink.
Keeping the Ns & Ps towards the bottom will allow the PCB to be mounted just below the sinks to keep the wires fairly short. Psu below that leaving the sinks looking like they are mounted on a flagpole.
Bolt the two 6" to the back of the 14" leaving a horizontal gap of ~2" between.
Fit the F5T into that gap.
This should adequately cool your proposed monoblock amp.
You could reduce the height of the heatsinks below the F5T. Maybe 3" at bottom, 6" at top and 11" joining them.
Alternatively mount the 6" heatsinks back to back with a 1" vertical gap between them.
Mount half the Ns and half the Ps to one sink.
Mount the remaining Ns & Ps to the other sink.
Keeping the Ns & Ps towards the bottom will allow the PCB to be mounted just below the sinks to keep the wires fairly short. Psu below that leaving the sinks looking like they are mounted on a flagpole.
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i allready have the sinks. so there will not be any changes there 🙂
i'm not going to use 8-900euros extra on sinks when i dont need to 🙂
i'm not going to use 8-900euros extra on sinks when i dont need to 🙂
Hello. I have 2 pcs of fischer sk 159. l 400mm h 200mm d 85 mm ? is One heatsink
enough for one channel F5 Turbo V3 ? Regards.
SK 159, Standard extruded heatsinks, Heatsinks f.cool, Fischer Elektronik
enough for one channel F5 Turbo V3 ? Regards.
SK 159, Standard extruded heatsinks, Heatsinks f.cool, Fischer Elektronik
The Rth is around 0,15 C/W. If you have 8 mosfets all dissipating around 30 Watt= 240 Watt. So 0.15x240= 36 C temperature rise above T ambient.
Don't know how hot it is over there, but say 24C + 36C = 60 C. Wouldn't go further then this 60C.
And there is an effect that the heatsinks are specified at a higher temperature where they dissipate better...so they will actually run hotter than the 60C.
But give it a try, you can always lower the bias a bit. ( Like I did...)
I have 80mm fins, 200 x 300 mm sinks, and they dissipate around 160 -180 Watt.
Your heatsinks are 100 mm longer and they have ribbed fins, so give it a try.
Walter
Don't know how hot it is over there, but say 24C + 36C = 60 C. Wouldn't go further then this 60C.
And there is an effect that the heatsinks are specified at a higher temperature where they dissipate better...so they will actually run hotter than the 60C.
But give it a try, you can always lower the bias a bit. ( Like I did...)
I have 80mm fins, 200 x 300 mm sinks, and they dissipate around 160 -180 Watt.
Your heatsinks are 100 mm longer and they have ribbed fins, so give it a try.
Walter
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