[Discuss-gnuradio] Re: Enclosure -- connection points for fan

[Matt Ettus]

> I have an earlier USRP board (serial 258 or something like that) that
> doesn't have a fan connector.  Any suggestion for the simplest way to
> tie the fan to appropriate power?  I didn't find anything obvious on the
> ettus.com site or the wiki about that.
>   

Earlier USRPs don't have a fan connector.  Cut the connector off of the
fan cable.  Solder the black wire to J1001, which is ground on the
board.  Solder the red wire to the pin on the end of the power supply
connector.  The fan will be a little loud since this is 6.3V on a fan
rated for 4-7V.  You can put a 10 or 12 ohm resistor in line on the red
wire if you want it to be quieter.

Matt