Re: Cooling fan Shroud

Albert Peter
 

The only problem with fan speed controllers is a reduction in cooling capability.  IMHO it is better to start with a capable quiet fan that does not require more circuitry.  It may cost a bit more, but is a simpler solution.

Al

AC8GY

 

Sent from Mail for Windows 10

 

From: Woody
Sent: Thursday, January 17, 2019 11:57 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Cooling fan Shroud

 

Fan controllers are easy to build and minimize noise when not needed.

Something like these...  YMMV

Variable analog - Had to add the 3.3 ohm to reduce induced noise in the uBITx from high current fan.

OR

Switched - OFF/ON



Inexpensive fans can be had surplus, like at:
https://www.allelectronics.com/category/220/fans/1.html
https://www.mpja.com/DC-Axial-Fans/products/48/

 

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