[RFI] Spectrum Cable Boxes
n2ki.ham at gmail.com
Sun Nov 10 21:22:54 EST 2019
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?
On Sun, Oct 27, 2019 at 12:52 AM James Gordon Beattie Jr <w2ttt at att.net>
> Will the cable box run on a 12VDC battery?
> Gordon Beattie, W2TTT
> Get Outlook for Android <https://aka.ms/ghei36>
> On Sat, Oct 26, 2019 at 6:14 PM -0400, "Anthony (N2KI)" <
> n2ki.ham at 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.
>> 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 at contesting.com] On Behalf Of Anthony (N2KI)
>> > Sent: Thursday, October 10, 2019 6:55 PM
>> > To: rfi at 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)
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