Yes, Jerry....
The problem is more human relations than technical. I've filtered several
switchers (computers, monitors) with some success. I guess my biggest worry
is how do I get a good old N. Georgia boy to let me take his kids' Christmas
presents, then crack them open and put filters in. Heck, he doesn't
understand how this is all of a sudden his problem.
How does one tactfully explain that the Christmas gift he was so proud of
yesterday now puts him in the position of being liable to his neighbor and
to the government for clearing up an issue he neither understands, nor
morally and ethically, agrees even exists??? Skepticism abounds.
This is indeed a wicky sticket.
Phil
VFO Stabilizers and PEP adapters for wattmeters...Check out
http://home.comcast.net/~k4dpk
----- Original Message -----
From: "Jerry Volpe" <kg6tt@tomorrowsweb.com>
To: <tentec@contesting.com>
Sent: Wednesday, January 05, 2005 9:11 PM
Subject: Re: [TenTec] Noisy RF Environment
> Phil Chambley, Sr. wrote:
>
> >Pursuing Jerry's comment about noisy environs, several of the
neighborhood kids got these battery-powered motor scooters for Christmas.
The chargers are 24 volt switching supplies, and they are eating me alive.
The Paragon and Paragon II noise blanking circuits will only start removing
the hash long after audio on SSB has been destroyed. CW sounds like it's
coming through DSP heterodyne filters.
> >
> >I know Riley would be on my side if it came to that, but how would you
handle it without having disharmony in the neighborhood?
> >
> >Anyone have any experience with filtering these scooter chargers? This
stuff is 10-15 dB over 9.
> >
> >Phil C.
> >K4DPK
> >VFO Stabilizers and PEP adapters for wattmeters...Check out
http://home.comcast.net/~k4dpk
> >_______________________________________________
> >TenTec mailing list
> >TenTec@contesting.com
> >http://lists.contesting.com/mailman/listinfo/tentec
> >
> >
> >
> >
> Seems to me there was a article in a recent QST about switching power
> supplies and the RFI they can generate. Perhaps there is a starting point.
>
> I would imagine like many manufacturers they keep parts cost down so
> there probably are't any brut force RFI filters on the AC inputs. If it
> was my switching power supply I would start there and then probably
> change the output wiring to a shielded type, maybe wrap it around a
> large toroid. Hmmmm, it is always so touch and go when the offending
> device belongs to someone else.
>
> Jerry
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