[Cube] cooling fan for 450 MHz cube

[Riba]

> I understand that there is already a fan power connector built into  
> the cube.
> Is there a special fan I need to fit my cube (and it's connector)?

The only limit is the height, most of the 80x80cm fans out there are  
25mm thick, you need one that is 12.5mm thick in order to fit  
perfectly. You can get those from jameco (www.jameco.com) or mouser  
electronics (www.mouser.com). I even saved the required part numbers  
from mouser, let me see...
Here it is, all you need, the fan, and the connectors to connect it  
to the built in connector in cube:

Stock No.:
538-51021-0200
Description:
MOLEX CONNECTOR KITS 2P TERM HSNG .049"
Manufacturer's Part No.:
51021-0200
===============================================
Stock No.:
538-50058-8000
Description:
MOLEX CONTACTS SOCKET 28-32 REEL
Manufacturer's Part No.:
50058-8000
==============================================
Stock No.:
664-D8015MX1-12V
Description:
ADDA DC FANS 80X15 12DC MD SP HY
Manufacturer's Part No.:
AD0812MX-D71

> Can I make the fan switch on when the cube heats up (and off when  
> it's cool)?

Yes, by using the thermal switch, but I wouldn't go that far.