so is the "roar" a hum, a hiss, a rapid clicking like a relay?
i'm not sure, but if the astron rm35a doesn't have a fan, there should be
little to no noise even at a 35 amp draw....the transformer will hum a
little, but no more then a little. Are there relays in the astron supplies?
73
Colin, V A6BKX
----- Original Message -----
From: "John Miller" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, October 14, 2008 7:53 AM
Subject: Re: DC Power Supply Roar
>
> There isn't an internal fan on astron power supplies except maybe the
> switching ones.
> ----- Original Message -----
> From: "Colin McDonald" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, October 14, 2008 12:04 AM
> Subject: Re: DC Power Supply Roar
>
>
> > 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.
> >> >
> >>
> >>
> >> --
> >> No virus found in this incoming message.
> >> Checked by AVG.
> >> Version: 7.5.524 / Virus Database: 270.8.0/1722 - Release Date:
> >> 10/13/2008
> > 7:50 AM
> >>
> >>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG.
> Version: 7.5.524 / Virus Database: 270.8.0/1722 - Release Date: 10/13/2008
7:50 AM
>
>
|
