Thanks Morris. The 'inaudible' bit is very important as I'm gonna need 2. I'd been looking at the range but they are quite a bit I more expensive
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Run a 12volt fan off a 6v battery, will run slower and quieter.
1 for each amp.
Made a fan controller a few weeks ago on Martin F5 turbos
we have to use 140 mm fans due to sink size
200mm would be much better
speed controller is quite simple all you need is a mosfet a thermistor and a trimmer
all info is on my thread The bug is back
That reminded me of the “Turbulent Juice”, commercials on Rick and Morty!
https://youtu.be/jbZZnYtapd0
Russell