Computers have mad filtering due to errors.
Bad power line noise in early mainframe and similar computers caused data
errors.
When dealing with mission critical systems (and everyone believes theirs
are), you have to have 0 chance of error.
Not to mention, it also causes semiconductors to let the smoke out. I've
got 4 switching supplies here that all died during 2-3 strike power
fluctuations (wind causing the lines to short, ice, etc)..... SOLA would be
my best friend here.
--Toll_Free
On Sun, Oct 31, 2010 at 6:39 AM, Carl <km1h@jeremy.mv.com> wrote:
> Basic filtering is already in place to prevent RF from getting into the AC
> line. Many hams do not use an earth ground to the chassis and going to a
> .01
> line to chassis bypass can give a nice tingle at 240V when you interconnect
> floating cables.
>
> However a suitable commercial type 240V 20-30A suppressor is large, and
> expensive if bought new. I have a 50A computer surplus one from a DEC
> mainframe, installed at the main panel which feeds 2 amplifier outlets. The
> other 240V lines into the shack and the workbench are unprotected until I
> locate more filters. These commercial filters mandate an earth ground.
>
> The computer manufacturers thought enough about having clean AC so I dont
> understand why a few hams are arguing the subject. Spikes can cause damage,
> plain and simple.
>
> Carl
> KM1H
>
>
>
> ----- Original Message -----
> From: "Steve Thompson" <g8gsq@f2s.com>
> To: <amps@contesting.com>
> Sent: Sunday, October 31, 2010 3:37 AM
> Subject: Re: [Amps] HV rectifier strings - to bypass or not?
>
>
> > If there's a problem with spikes on the line, isn't it better to
> > get rid of them with filtering at the line input so they don't
> > reach the transformer in the first place?
> >
> > Steve
> >
> > > -----Original Message-----
> > > From: Carl [mailto:km1h@jeremy.mv.com]
> > > Sent: Saturday, October 30, 2010 8:44 PM
> > > To: garyschafer@comcast.net; 'Jim Thomson'; amps@contesting.com
> > > Subject: Re: [Amps] HV rectifier strings - to bypass or not?
> > >
> > > You dont want intense line spikes going thru electrolytics.
> > >
> > > Carl
> > > KM1H
> > >
> > >
> > > ----- Original Message -----
> > > From: "Gary Schafer" <garyschafer@comcast.net>
> > > To: "'Jim Thomson'" <jim.thom@telus.net>; <amps@contesting.com>
> > > Sent: Saturday, October 30, 2010 9:28 PM
> > > Subject: Re: [Amps] HV rectifier strings - to bypass or not?
> > >
> > >
> > > > Why place a capacitor across each diode string on a full wave
> > bridge?
> > > The
> > > > filter capacitor is always across the transformer secondary.
> > > >
> > > > 73
> > > > Gary K4FMX
> > > >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|