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Author Topic: Noisy Fan  (Read 1627 times)
VE2AIE
Member

Posts: 25




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« on: July 28, 2004, 08:42:47 PM »

Hello to all,

Sudently today i've turn on  the Ameritron AL-811 Amp and the is a noise that i can hear on my rig on most freq., most band. It look like it is the fan doing this interfer. Can i clean this fan? Can i had somethig to clear this interfer?

Tnx a lot!

Regard's

Mario, VE2AIE
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WB2WIK
Member

Posts: 21836




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« Reply #1 on: July 29, 2004, 11:45:32 AM »

The fan in an AL-811 is making "RF" noise you can hear in your receiver?  That would sure be the first case I've ever heard of something like that.  It's an AC fan, with windings and no contactors or brushes, and I really don't see how it can generate any RF noise.

To confirm what you think, why not remove the cover of the amp (with it "off" and unplugged from the AC line!), disconnect the fan, and then sit the cover back on the amp again (without installing all the screws), plug it in, and turn it on.  If the noise is still there, obviously it wasn't the fan.  If the noise is not there, then perhaps it was the fan -- but that would surely be unusual.

WB2WIK/6
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