Not sure if this is the correct forum for this question, if not could moderators move it please.
I have heat sinks for a class A that require fan cooling. I am thinking of using EBM Papst fans of either 24V DC or 240V AC . I would like to control the speed to obtain lowest noise for the required cooling.
The question is, which will give lowest radiated electrical " noise" that may be picked up by the amplifier. Are there any other considerations.
Best Regards
Alan
I have heat sinks for a class A that require fan cooling. I am thinking of using EBM Papst fans of either 24V DC or 240V AC . I would like to control the speed to obtain lowest noise for the required cooling.
The question is, which will give lowest radiated electrical " noise" that may be picked up by the amplifier. Are there any other considerations.
Best Regards
Alan
A 240VAC fan is quieter than a 12V BLDC fan. A DC fan has a slight mechanical noise induced into its structure by the switching of the coils and the consequent bumpy torque applied to the fan. AC fan is much smoother. To slow an AC fan down, put several microfarads worth of class X mains capacitor in series with the motor.
Thanks circlotron and adason for the replies and links.
Bare, it must be a rare talent to be able to make derogatory remarks about something you have not seen or even had described to you, remarkable.
The heat sink tunnels I am using are virtually identical to those used in the Krell KSA50 and KSA100 only they are slightly taller. Each will be required to dissipate approx. 160W of heat, considerably lower than each in the KSA100. Perhaps the next post you write could be to Mr. D'agostino and tell him what "clearly woefully undersized heatsinks" he used.
Best Regards
Alan
Bare, it must be a rare talent to be able to make derogatory remarks about something you have not seen or even had described to you, remarkable.
The heat sink tunnels I am using are virtually identical to those used in the Krell KSA50 and KSA100 only they are slightly taller. Each will be required to dissipate approx. 160W of heat, considerably lower than each in the KSA100. Perhaps the next post you write could be to Mr. D'agostino and tell him what "clearly woefully undersized heatsinks" he used.
Best Regards
Alan
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