PSA: Blow it out yer amps!

[John Roberts]

Re: PSA: Blow it out yer amps!

...and it is still available:
Architectural Acoustics IPS-150

Yup, the AA version with barrier strip. Original was called something like a CS150. Clever feature was a switch so PS rails could be optimized for load, so it put 75W into several different speaker impedances.

JR

PS: Did you know Mike Powers (RIP)?

 

[Per Søvik]

Re: PSA: Blow it out yer amps!

Apparently Google is your friend, too. Why not share your incontrovertible proof? I'm willing to be proven wrong. Based on my understanding of physics - wrong as it may be - it seems that a few seconds of spinning at say 10X the normal speed relative to hundreds or thousands of hours at normal speed represents a tiny fraction of fan wear. Even if bearing wear during those few seconds is 10X per revolution due to the force of the air, vibration, etc., that's still a small number.

Except for possibly damaging bearings when speed is massively in excess of design speed, the real problem with spinning electrical motors at excessive speeds is induction and discharging in an uncontrolled manner that can kill the control circuitry and/or damage the windings of the motor. Sometimes you can even throw the windings even if you don't damage them electrically.

 

[Bennett Prescott]

Re: PSA: Blow it out yer amps!

Aren't most computer fans brushless anyway so it doesn't matter?

 

[John Roberts]

Re: PSA: Blow it out yer amps!

We have first hand reports that "some" fans are damaged by doing this.

Do you feel lucky.... ?

Why risk damaging gear for a cheap thrill?

JR

 

[Josh Millward]

Re: PSA: Blow it out yer amps!

PS: Did you know Mike Powers (RIP)?

While I had heard of him, I did not know him personally.

It is always sad to hear about such things.

 

[Per Søvik]

Re: PSA: Blow it out yer amps!

Aren't most computer fans brushless anyway so it doesn't matter?

While a moving magnet motor (brushless) doesn't have windings that can be thrown by the speed of rotation, you are still inducing current and voltage in the windings, and if the electronics are not built to handle this, damage can be done.