Re: [IRCA] QRM from Lights

[Chuck Hutton <charlesh3@xxxxxxx>]

The reason some products have RFI problems and others don't is almost always traceable to money. It takes a bit of money to design things so that RFI is minimized, and it costs a little money for components to filter the interference and shield the susceptible areas. 
 
Manufacturing variability should be almost a non-factor, in my opinion.
 
Chuck
 
> From: canswl@xxxxxxxxx
> Date: Sun, 18 May 2014 19:47:19 +0000
> To: barry.davies25@xxxxxxxxxxxxxxx; irca@xxxxxxxxxxxxxxxx
> Subject: Re: [IRCA] QRM from Lights
> 
> Fellas, I think a problem here is that you cannot assume that all power
> supplies are identical.  So identical laptops, with "identical" power
> supplies can act quite differently.  Perhaps the PSU is manufactured in
> batches, or in different factories.  I seem to recall reading the same a
> few years back.  I suspect the same can be said for light bulbs, etc etc.
> My best advice is to try them first!   73,  Walt
> 
> 
> On Sun, May 18, 2014 at 7:37 PM, Barry Davies <
> barry.davies25@xxxxxxxxxxxxxxx> wrote:
> 
> > One for laptop PSU would also helpful :-)
> >
> >
> >
> >
> >
> > Best wishes and 73's
> >
> > Barry  :-)
> >
> > Carlisle UK.  Lat. 54.9795N   Lon. 02.8745W
> > PERSEUS, 3.7m x 10m Flag + FLG100 amp+Mains Filter
> >
> >
> > >________________________________
> > > From: Tim Kridel <tim@xxxxxxxxxxxxx>
> > >To: "irca@xxxxxxxxxxxxxxxx" <irca@xxxxxxxxxxxxxxxx>
> > >Sent: Sunday, 18 May 2014, 15:28
> > >Subject: [IRCA] QRM from Lights
> > >
> > >
> > >Sure, that¹s one type.
> > >
> > >I wonder if it¹s worth building a database of CFL, LED and halogen
> > >products that are known to be ‹ or not be ‹ sources of RFI. (There, I used
> > >a term we all probably can agree on.) So when DXers need to replace bulbs,
> > >they can check the database to see which products to consider or avoid.
> > >
> > >>------------------------------
> > >>
> > >>Message: 5
> > >>Date: Sat, 17 May 2014 19:32:37 -0700 (PDT)
> > >>From: "Powell E. Way III" <w4opw@xxxxxxxxx>
> > >>To: Mailing list for the International Radio Club of America
> > >>    <irca@xxxxxxxxxxxxxxxx>
> > >>Subject: Re: [IRCA] QRM from Lights
> > >>Message-ID:
> > >>    <1400380357.8359.YahooMailNeo@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > >>Content-Type: text/plain; charset=iso-8859-1
> > >>
> > >>Man made as in radio stations transmitting..... ? :)
> > >
> > >
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