Great point! I have two large fans on my L-7PS, 12 volt fans connected in series on a 12 volt power supply. They are barely audible if I really listen for them with no other noise in the room. The IBM ethernet switch on the shelf behind me easily drowns them out. And they do still move a good volume of air.
73 -Jim On Wed, 30 Nov 2011 20:07:23 -0800, Dennis Monticelli wrote: >You can get the same airflow by running a larger fan at a lower speed with the >benefit being lower audible noise. I have some surplus 4" fans that have >rubber feet attached and just sit over the hot portion of the cabinet. I run >them at a DC value below their ratings. They don't walk, aren't heard, and >substantially lower the peak temps within the radio. -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! "Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime." HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
