[TenTec] Noise from Fans

Rick - DJ0IP / NJ0IP Rick at DJ0IP.de
Fri Mar 7 02:51:08 EST 2014

That is very good.
Try using diodes instead of a resistor.
Use a string of 1N4004 or similar.
Each diode drops a good half volt.
You can even make it multi speed if you add a small switch.

73 - Rick, DJ0IP
(Nr. Frankfurt am Main)

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of K8JHR
Sent: Friday, March 07, 2014 12:03 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Noise from Fans

Here is my solution - using very quiet computer fans.  See the link at 
the bottom of the page:    "Cooling Fan Project"


I sometimes use a small resistor to slow them down, but they run on 12v and
usually spec out around 15-19 dB noise factor.

I just could not spend over $40 on the TT fan, when I could make one for
less than $10 - including buying a brand new fan.  Mine are CoolerMaster
fans that cost me $7 I think.

Maybe my plan will spur some other ideas.

------------------------- K8JHR ---------------------

On 3/6/2014 5:21 AM, Rick - DJ0IP / NJ0IP wrote:

> At the time, most small PC towers had small case fans that ran on 12v,

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