[Amps] Amplifier Fans:

[Carl]

Ask after you have quieted or replaced the switcher

Carl
KM1H


----- Original Message ----- 
From: "Bruce Osterberg" <n9bx at mchsi.com>
To: <Amps at contesting.com>
Sent: Saturday, August 25, 2012 2:33 PM
Subject: [Amps] Amplifier Fans:


> 
> Hello:  I have Built a W6PO amplifier in a 30 Inch rack cabinet, along 
> with it's power supply,(pictures available upon request.)  But I thought 
> I would add some internal fans on the inside to help cool the 
> transformer and exhaust a bit more air.  Well that turned out OK except 
> for the Noise, (electrical that the Fans Produce.)
> 
> With out the Fans on the noise level on the K3 is right at S1 all the 
> time.  Once the Fans are on it goes up to S5 and Stays there.  Mind you 
> these are cheap Ham fest fans, but I don't know if adding anything to 
> them would cut down on the Electrical Noise Generated.  But then as I 
> think of it I may have a Problem with the Switching Power supply from 
> China that I am using to provide power to the Fans.  That's easier to 
> check.  But if it's the Fans, is there a solution to this delima?
> 
> 73 Bruce N9BX
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