[hpsdr] To suck or to blow, that is the question.

[Dick Faust]

Fry's also has a stand alone fan controller # 4319215 for $6.99 on 
frys.com or on sale in Phoenix, AZ stores this week for $3.99.  The 
previously mentioned fans from Antec and others already have a switch or 
controller.

Seems I saw a web page some time ago that suggested that  for dumb fans 
switching the fan between 12 V and ground or 12  V and +5 V [ie 7 V] 
would do the same thing with out anything other than a switch - should 
be quieter than a lot of pulse circuitry.

Dick Faust K9IVB

John Koster wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Good for a 'dumb' fan, but many of those I can buy at Fry's have a control
> lead which when left unterminated lets the fan run full speed.  If you
> have the right control voltage going to it, you don't need all the
> circuitry shown in your link.  Guess one needs to find the schematic of a
> Mobo and duplicate that circuit if it's not buried in one of the large
> ICs.  Perhaps it's a signal out of the processor these days?
>
> On Sat, 11 Jul 2009, Luis Perdomo wrote:
>
>   
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Speed & temp controller for muffin fans and the like:
>>
>> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120444743805
>>
>> Luis, NZ5U
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