[amsat-bb] 2 meter interference from WiFi hub

[Jean Marc Momple]

Agree,

I have 2 Wi-Fi transmitting all the time in the shack, Zero-issue on alls the Ham bands (except 2.4 Ghz).

1) As Paul said, ferrites everywhere. On all computer, speakers, mic, DC, AC and data cables. Basically any cable in or out of any box/interface should have one each side. Have over 100 installed.
2) Bonding the +++, all equipment or metal part in the shack should be bonded to the main ground-bar with the thicker wire practically possible. The ground bar should be connected to the antenna and to the ground system with the largest possible cable (I use 35 m2 cable to the antennas and 50 m2 from the main ground bar to earth). More this protects your equipment in case of lightning strike, sure use only one ground/bonding system (I disconnected the mains one) and hopefully will install an isolating transformer soon.

Doing so, the noise level in the shack is drastically reduce and interference from the household or neighbors also.

Hope this help.

Jean Marc (3B8DU)



> On Oct 21, 2018, at 7:47 PM, Paul Stoetzer <n8hm at arrl.net> wrote:
> 
> Try putting ferrite beads on all of your cables into and out of the
> routers, modems, etc.
> 
> 73,
> 
> Paul, N8HM
> On Sun, Oct 21, 2018 at 11:12 AM Burns Fisher <burns at fisher.cc> wrote:
>> 
>> Turns out it was NOT the hub.  It was the camera I had plugged into it with
>> CAT5.  The camera is looking at my antennas so I can see where they are
>> rotating, but the wire runs a ways.  Probably radiates nicely, and
>> conveniently right in the 2 meter band.  More fooling around required...
>> 
>> On Sun, Oct 21, 2018 at 9:08 AM Burns Fisher <burns at fisher.cc> wrote:
>> 
>>> Thanks, Jerry.  This one is clearly mine.  I unplug it...the frequency
>>> comes back.  I thought it might be beating two different channels, and I
>>> guess that's possible but the WiFi channels are 5MHz apart, although they
>>> do overlap.  For now, I'll just turn it off when trying to use AO-91 :-)
>>> 
>>> On Sun, Oct 21, 2018 at 12:57 AM Jerry Buxton <n0jy at amsat.org> wrote:
>>> 
>>>> On 10/20/2018 18:57, Burns Fisher wrote:
>>>>> So the question is:  I want to replace this with another WiFi hub.  Does
>>>>> anyone have good or bad recommendations for a hub that does not
>>>> generate a
>>>>> lot of RF? (When you google Wi-Fi and RF interference, you mainly get
>>>> other
>>>>> things that interfere with Wi-Fi :-))
>>>> I have an older router that caused me some problems, but it's not made
>>>> any longer so you don't have to worry about not buying one.  I solved
>>>> that problem by moving it out of the attic, to a downstairs bedroom
>>>> farther away.
>>>> 
>>>> But just FYI for possible future problems, I do still pick up
>>>> interference from a neighbor that gets in the way of AO-73 and AO-92 at
>>>> the lower end of their passband/Doppler shift.  So it may not always be
>>>> your own!
>>>> 
>>>> Jerry Buxton, NØJY
>>>> 
>>>> _______________________________________________
>>>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>>>> to all interested persons worldwide without requiring membership.
>>>> Opinions expressed
>>>> are solely those of the author, and do not reflect the official views of
>>>> AMSAT-NA.
>>>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>>> 
>>> 
>> _______________________________________________
>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership. Opinions expressed
>> are solely those of the author, and do not reflect the official views of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions expressed
> are solely those of the author, and do not reflect the official views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb