[RFI] UVerse WAP VEN501-AT Interference
clark.macaulay at gmail.com
Thu Jan 28 16:15:45 EST 2016
This is an update and the last post to this thread. May others benefit
from what has been done here.
The more diagnosis I did, the indications were that the WAP was the culprit
and not the wireless receivers. At the suggestion of Chuck AE4CW, ferrites
with 5T each were added to BOTH ends of the CAT5 cable between the Arris
modem and the WAP and to power cords for the WAP and modem but CLOSE to the
WAP/modem and not the power supply. This removed most of the offending
signals. There is still a trace of the signal from the WAP but, like most
things today, we can't get rid of all of it except on the moon.
Thanks to all who suggested choking the CAT5 cables. I would have never
thought to do that.
On Tue, Jan 26, 2016 at 9:07 PM, Clark Macaulay <clark.macaulay at gmail.com>
> A few months ago, I had the uVerse equipment changed to a new modem and
> two new wireless TV boxes that interface with the subject unit. They also
> replaced the aging coax cable with CAT5 cable to the new modem which drives
> the TV set top boxes. Immediately I noticed that my transmitting no
> longer caused the uVerse equipment into reset. My bride could watch the TV
> while I pursued my hobby with no interference to the TV. Goodness.
> In the last two weeks while chasing VP8STI, my panadapter, which I had not
> used since the new equipment was installed, showed single frequency
> interference on many bands and in many places on the band. They appear to
> be like spurs. On 20m, the spacing was about 14000 Mhz, 14030, 140060,
> 14090. There is something similar on the higher bands. I could see nothing
> on 40m and only one spur on 30m at 10115. Signal level is at S5. It is
> not a noise hump like a wall wart.
> Investigation points to the above WAP unit in that when it is unplugged,
> the signals disappear. I have put a toroid core on the power lead to the
> WAP with no effect. Equipment here is a K3 with LP-PAN2 and I can provide
> pictures if that would help. I have confirmed the signal using another rig
> that is battery powered with the shack power supply and shack computer OFF.
> Before I try to explain to the good folk at ATT what RFI is,I'm wondering
> if anyone else has experienced something like this. I've googled the
> VEN501-AT and while there is a lot of chatter about it, I've not found
> anyone having RFI problems like I have.
> Is there something in my station that could be causing the problem? I've
> run out of ideas.
> Clark WU4B
> QRPARCI #10815
> SKCC #3892
> Southeastern DX Club <http://www.sedxc.org>
> North Georgia QRP Club <http://www.nogaqrp.org>
> Kennehoochee Amateur Radio Club <http://www.w4bti.org>
> *"It is vain to do with more what can be done with less."*
> *Attributed to *William of Occam (1288 AD - 1348 AD)
Southeastern DX Club <http://www.sedxc.org>
North Georgia QRP Club <http://www.nogaqrp.org>
Kennehoochee Amateur Radio Club <http://www.w4bti.org>
*"It is vain to do with more what can be done with less."*
*Attributed to *William of Occam (1288 AD - 1348 AD)
More information about the RFI