Just tested with a commercial 13.8v 8a supply. No RFI issue even at 1200
watts output CW.
I will monitor going forward.
Thanks!
Regards,
Anthony (N2KI)
On Sun, Nov 10, 2019 at 9:27 PM Jamie WW3S <ww3s@zoominternet.net> wrote:
> get a small Astron linear supply, preferably old stock, if newer, make
> sure the green wire inside is connected to the chassis by scraping the
> paint of so it make contact to bare metal, and while you are at it,
> remove the paint from the cabinet interior where each screw goes in
>
> ------ Original Message ------
> From: "Anthony (N2KI)" <n2ki.ham@gmail.com>
> To: "James Gordon Beattie Jr" <w2ttt@att.net>; "rfi@contesting.com"
> <rfi@contesting.com>
> Sent: 11/10/2019 9:22:54 PM
> Subject: Re: [RFI] Spectrum Cable Boxes
>
> >Update to the Spectrum Cable box testing,
> >
> >What I have tried.
> >
> > - RF Chokes (Material 31) on power, HDMI & RG6 - DID NOT FIX RFI
> > - Tightly wrapping the entire box in foil. - DID NOT FIX RFI
> > - Putting the box on a 12v battery - VIOLA - NO RFI
> >
> >So now that we know its the power supply, I have to find a 12v 3A wall
> >wart that is not affected by RFI. Suggestions?
> >
> >Thanks!
> >
> >Regards,
> >
> >Anthony (N2KI)
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >On Sun, Oct 27, 2019 at 12:52 AM James Gordon Beattie Jr <w2ttt@att.net>
> >wrote:
> >
> >> Anthony,
> >> Will the cable box run on a 12VDC battery?
> >> 73,
> >> Gordon Beattie, W2TTT
> >> 201.314.6964
> >>
> >> Get Outlook for Android <https://aka.ms/ghei36>
> >>
> >>
> >>
> >>
> >> On Sat, Oct 26, 2019 at 6:14 PM -0400, "Anthony (N2KI)" <
> >>n2ki.ham@gmail.com> wrote:
> >>
> >> I have choked of all cables on in multiple locations and the box still
> >>> "explodes". I have no access to a 3A 12vDC power supply to try and
> swap to
> >>> see if that makes a difference.
> >>>
> >>>
> >>> Regards,
> >>>
> >>> Anthony (N2KI)
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> On Thu, Oct 17, 2019 at 9:35 PM Jim Miller wrote:
> >>>
> >>> > I got called out on a DFing trip because all of a sudden several
> people in
> >>> > a
> >>> > section of a subdivision couldn't get their garage doors to open
> one Sunday
> >>> > morning. By the time I got there the count was up to 5 doors as I
> >>> > remember.
> >>> > Long story but found a new box on the side of a garage. It had
> been worked
> >>> > on (or installed?) the day before. The cable company came back out
> and
> >>> > fixed
> >>> > it. Most likely as it was assumed to be a bad cable connector
> >>> > installation.
> >>> > "Replacing" the box won't help if the coax connector isn't installed
> >>> > properly.
> >>> > 73, Jim KG0KP
> >>> >
> >>> >
> >>> > -----Original Message-----
> >>> > From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of Anthony
> (N2KI)
> >>> > Sent: Thursday, October 10, 2019 6:55 PM
> >>> > To: rfi@contesting.com
> >>> > Subject: [RFI] Spectrum Cable Boxes
> >>> >
> >>> > Hello folks,
> >>> >
> >>> > Anyone on here have experience RF shielding a Spectrum Cable box?
> I have
> >>> > tried all sorts of RF chokes (Material 31 1-300mHz) on the power,
> HDMI and
> >>> > coax inputs with very little success. Pretty much any band wipes
> out the
> >>> > cable boxes. Its not a proximity effect to the antenna as the 80
> meter
> >>> > antenna is at 80 feet and about 50 feet away from the house. Also,
> I must
> >>> > point out that the previous cable boxes did not have these issues.
> So I am
> >>> > fairly confident this is an RF shielding/filtering issue with the
> boxes.
> >>> > In speaking with Spectrum, I could not reach anyone in a technical
> >>> > department that has RFI experience. Next step and test is wrapping
> the
> >>> > boxes with aluminum foil, or cutting the cord.
> >>> >
> >>> > Thanks for any suggestions.
> >>> >
> >>> > Regards,
> >>> >
> >>> > Anthony (N2KI)
> >>> > _______________________________________________
> >>> > RFI mailing list
> >>> > RFI@contesting.com
> >>> > http://lists.contesting.com/mailman/listinfo/rfi
> >>> >
> >>> >
> >>> >
> >>> _______________________________________________
> >>> RFI mailing listRFI@contesting.comhttp://
> lists.contesting.com/mailman/listinfo/rfi
> >>>
> >>>
> >_______________________________________________
> >RFI mailing list
> >RFI@contesting.com
> >http://lists.contesting.com/mailman/listinfo/rfi
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>
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