[time-nuts] HP 5372A Fan
Mark Sims
holrum at hotmail.com
Wed Mar 10 17:04:25 UTC 2010
Are you sure that it has a variable speed fan? My 5372A has a pretty quiet fan and I have never tried to change it. I am assuming that it uses the same 117V fan as the 5371A. That thermal switch may be a power supply shutdown.
I have a couple of 5371A's that are a different matter. Utterly obnoxious fans. I put in much quieter 12V fans. I powered them with a separate wall wart module mounted inside the box with velcro. I used Nidec Beta V TA450DC fans rated at 250 mA. Again, I checked the before/after thermal environment and found no changes.
I have some even quieter NMB "Smartfans" with a thermal sensor. They draw around 150 mA until the temp reaches 35C, then they kick in at 750 mA and scream bloody murder.
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