E/G Power Supply - replacing fans with modern ones

[sintech]

Thanks Marc, just changed two supplies over this afternoon, now sucking in.

[nycsudio1]

I like to keep things as intended. I left the rear fan reversed (sucking out) and the two front ones blowing in and haven't had any problems so far.

From what I've seen on a few console psu's including mine the fan on the back of the unit is mounted in reverse position from the other two.

I had the same concern but realized that the 2 fans in the front of the unit are the most important ones so I never bothered with the one in the back and kept them mounted according to the original orientation.

What would you say is the correct orientation? Sucking out of the unit., or blowing inwards?

[waltzingbear]

thats probably as intended for 3 fans, 2 input and 1 exhaust. Keeps the air flow high and across the whole unit.

face it, these were intended for machine rooms, no way around it. OK, the noise is going to be high, so lets go ahead and put in more airflow and exhaust it because its in a machine room already!

Far different than today with engineered airflow solutions like the interior of a MacPro.

Cheers
Alan

[walrus]

While I was researching something else, I came across this site....  http://sound.westhost.com/heatsinks.htm
Towards the bottom under #18 Fan cooling, it says that the fan should *blow* air over the heatsink, as this creates a more turbulent flow over the sink.

So theoretically, the fans on the psu should blow in to the unit.....

[nycsudio1]

That's the same thing I read in the SSL books, however when I opened the psu I noticed the rear fan mounted backwards. I verified with other owners and was told that they noticed the same.

[Riff Raff]

UP !!!!
Hi everyone. I would like to replace my 3 old noisy fans in my CF66IE power supply.
Does anybody knows what exact modern model can do the job ?
Thanks a lot.

[Tonemiester]

I have replaced the fans in mine with a model that is quieter but pushes the same amount of air. They are still noisy but not as noisy as the originals. I will find the part numbers and respond.

Mike

[Riff Raff]

Thanks Mike