Yes, with some of the noctua fans you need to have your ear pretty close before you hear them. You don't need much cfm to make a big difference in cooling either. The air needs to be pushed through the fins of the heat sink. Figure 6 in this link shows how much difference it can make with just a little cfm.
How to Select a Suitable Heat Sink
How to Select a Suitable Heat Sink
I'm still undecided whether a nice raw hack job or do a pcb.
You could do this one blindfolded!
First up.
The 10uF cap at output is intended to be a polypropylene cap not an electrolytic.
GOOD CATCH!!
Ill wait a bit until the rest of my mistakes are discovered and then post a revision!
What lead spacing and diameter have you allowed for the 1000uF caps.
Some people are anal about using Elna Silmic Caps, so something to consider.
Lead spacing on 1000mfd caps is 7.5mm which I believe is the spacing for the highest voltage 18x40 Elnas.
For R4 and R5 it might be worthwhile allowing paralleled pairs of resistors.
Thanks, here's a revision with your suggestions!
Attachments
4.5 V is bias voltage for the mosfet gate.
Will need to build a regulated voltage circuit to bias the mosfet to 4.7v. Can use an adjustable regulator such as the LM317 or LT1083. 1083 is a low dropout type.
Might also need a second transformer and rectifier for the voltage reg.
lm329 with trimpot is another optionCould use an lm329.
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