the internal fan.
73
Colin, V A6BKX
----- Original Message ----- 
From: "Steve Forst" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, October 13, 2008 9:56 PM
Subject: Re: DC Power Supply Roar


>
> Bob,
>
> I've had an RS-20A for over 20 years and an RS-35A
> for 7 years.  Both can be  noisy and there is a vibration  you can feel if
> you touch the top cover.  I've found that just  moving it around  a bit
can
> reduce any noise, although I've never experienced the roar you describe.
> They also both clunk pretty good when powered up.
>
> 73, Steve KW3A
>
> ----- Original Message ----- 
> From: "Bob Martin" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, October 13, 2008 8:13 PM
> Subject: DC Power Supply Roar
>
>
> > Earlier today, my almost new ASTRON 35 developed a really loud roar
under
> > load.  It had been on receive for 2 or 3 hours.  Then, At 5 Watts
transmit
> > on FM,  it was hardly noticed.  At about 40 Watts it is quite lout and
at
> > 100 continuous it can be heard throughout the entire basement. Just now,
I
> > turned it on and went through the cycle noted above with no noise heard.
> > In
> > stand-by I can't hear it at all now but when I was experiencing the
> > problem,
> > I could feel it vibrating ever so slightly.  Will try it before I turn
in
> > tonight.
> >
> > Any thoughts?
> >
> > 73
> > Bob Martin
> > KC3FI
> >
> >
> > EchoLink Node - 55127
> > Please visit http://www.wan-leatonks.net.
> >
>
>
> -- 
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7:50 AM
>
>