Fairlight-CMI

On Fri, 09 Jul 2004 16:06:03 +0100, James Thomson
<jamesthomson@mac.com> wrote:

>Hi,

Hi James,

> I have a series 3 which I put modern SCSI 4 gig drives into. This enabled
>me to remove about 2 small fans which were used to cool the big drives which
>came with the series 3 originally. In fact the drive bay is big enough for 4
>drives.

Indeed it is.

> This then leaves us with I think 6 fans + 2 small ones for the power
>supply. Now I may have this number wrong here but I can double check this.
>We have to be sure of what voltage the fans require. 

In fact, the voltage is irrelevant. If the fans are DC (Direct
current) types you can serialize them and run any two fans in pairs at
half the voltage. I'm not sure how this would work with AC
(Alternating Current) fans. I've never tried them.

>I would then replace
>the fans with Papst silent PC fans with rubber mounting. I would then put PC
>sound insulation foam on the inside of all of the CMI white panels. 

In fact I use thin (4 mm) rubber undercarpet for this as it is rugged
on one side and has a dispersing surface on the rubber side (I should
post some photos somewhere).

>This
>should make a dramatic difference. In fact could we not run the 6 Papst fans
>at 1/2 speed ? What is the easiest way to do this?

See above ! :)

> I had Peter Wielk replace my 11X fans and I put foam material on the inside
>of the panels. 

Foam is nice, but rubber is even better. It's heavier though.

>There was quite a difference in the noise. If you are lucky
>enough to have a WFM-32 RAM card then I would think 3 fans would be
>sufficient for a series 3. I would be interested to hear what others think
>about this.
>
>Regards,
>
>
>James Thomson

I also left a message for you regarding your keypad on the holmes
pages.

Best regards,
Harald.