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-   -   heatsink for aleph 4 (http://www.diyaudio.com/forums/pass-labs/153208-heatsink-aleph-4-a.html)

slr 5000 11th October 2009 08:22 AM

heatsink for aleph 4
 
hi all
im in the process of nocking up an aleph 4 and just want some oppinions on my heatsinks

im using 4x conrad 350mm x 151mm sinks per monoblock
they will be setup so the sinks form the sides front and back of the monoblocks and will be screwed to each other the same as the original pass designs

im using the brian gt boards so each sink will take 3x irfp 240

each sink is rated at .21w for 80 degree c rise

regards sheafer

Luke 11th October 2009 09:20 AM

this should help you, same heatsinks, almost same amp.

http://www.users.on.net/~mefinnis/pa...nstruction.htm

slr 5000 11th October 2009 09:37 AM

hi mate
thanks for the link
yes these are the sinks but mine are flat backed and are 50mm longer than the ones in the pic so a little more efficient

the aleph 4 i,m building is double the power of the 5 though so im hoping that using 4x per mono block instead of 2x should be enough

regards sheafer

Bill Fuss 11th October 2009 11:54 AM

That should work fine, from experience those sinks can easily handle 90W each. I would space the fets out much more than the BrianGT OP boards will let you.

Best, Bill

slr 5000 12th October 2009 05:50 AM

thanks bill
i thought it should be ok but just wanted to check
4x runs an aleph 5 ok so 8x should be perfect for an aleph 4 as its not quite double an a5 for dissapation

regards sheafer

greguar 22nd September 2010 12:06 PM

Hi,
the question is: is it nesessary to have one heatsink per channel or each transistor can use his own heatsink?

Thanks

greguar 23rd September 2010 09:06 AM

Sorry,
found the answer in the forum
The question is closed


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