Not sure which project is in question (F5?), but applying it to my own (about to commence) Mini-A... (.56)W=25deg rise --> =25/.56 --> 44W/per sink dissipation.
2 devices/ch @ 15V, 1-1.5A = 30 to 45W. Not much of a safety factor with one sink per channel.
As Bill F. said a little earlier, four should handle both channels. I have no real experience to offer here though, as this is my first SS Class A build, and a small one at that.
I like the sinks, since they are already anodized, pretty, cheap, etc, but also trying to wrap my head around a case dimension (using some aluminum sheet and perf I already have, both 12"x12") that isn't too tall/skinny or flat/deep. Their dimensions are just enough to cause concern for either a) aesthetics, or b) room for PS.
From past experience, if you want to be able to touch them don't go past 30W. As the Master has said in the past, there is no such thing as too big of a heatsink. As I recall, he recommended a 6 x 8 x 2 for each fet in the F5.
Oh sorry, I meant the Mini. For F-5 I used M&M metals, 12.25 inches long, 8 inches high with 2 inch fins. They keep it where you couldnt cook breakfast on, you can touch it as long as you want, quite warm but not hot. Thanks for the reply, 4 of those for the Mini, thanks.
Russellc
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Best prices you will find. Any size cut to order. No, I don't have any affiliation, I just like his products.
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