cloud said:[snip]And last I do not believe my heatsinks can handle 12 IRF's !
You mean mounting space wise or power wise?
Jan Didden
With 25V secondaries, you'd end up with 32-33 volts after rectification/caps. You could safely bias it to 3-4 amps, but you'd have to make sure you can dissipate the heat. 4 amp bias@32V with 8 outputs, would give you roughly 260watts dissipation, and well in the safety range for fet reliability (depends on the heatsinking). 50w@8ohm, 100w@4ohm. Brians main amp board would be fine, but you'd have to P2P the output stage. If you give us the dimensions of your heatsinks that would narrow it down a bit.
-john
or you could just 'go for it' as the man says (he knows what he's talkin bout)
-john
or you could just 'go for it' as the man says (he knows what he's talkin bout)
I have 2 heatsinks each one is 1.375" tall w/1.0" fins spaced roughly 0.25" apart ! The length is 17.0" and the hieght is 8.0" Also I had planed on using the BrianGT output pcb's ! Being designed for 3 devices each my plan was to omit the center device. Again hoping for better spacing and less heat ! The sinks in question un-painted or anodized, they were purchased from surplus ect.... If they are not large enought please point me in a direction for something more ideal ! Also if the heatsinks were to be used at say a 45 degree angle as aposed to 90 would this help to improve there effiency ?????
Being fan assisted and at a 45 degree angle would this help enough to run at a 4.0 bias point ? Picture a triangle shaped enclosure with the top chopped off. Now with some portion of the top being flat mounting a couple fans to cool the interior as well as assisting the sinks, would not the draw be enough to improve cooling ect....
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Pass Labs
- Output Devices !