Jim, the problem around here with wifi is I can count 14 access points in
range, so bandwidth is horrible
I've found making my own Ethernet cables, each with a type 31 1/2 inch ID,
Circa 1/2 long with the 3 or 4 turns I can stuff through works well. My problem
is living in Queens (part of NYC) wher the houses are all on 40x100 lots, there
are a metric ton of RFI sources. I can tell when the neighbors are running
their wash, etc. I can't afford $100s of ferrite for every house within say 500
feet, and most would tell me to buzz off, so I live with S7 background noise on
some bands. Killing my own stuff helped, as well as the worst of some of the
closer neighbors
--
73 de KG2V
Charlie
> On Jul 25, 2015, at 4:54 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>
>> On Sat,7/25/2015 11:51 AM, Kenneth G. Gordon wrote:
>>> On 25 Jul 2015 at 13:31, Randy Farmer wrote:
>>>
>>> Ethernet birdies.
>> Ah. Makes sense. Dang.
>>
>>> You're lucky to have only two.
>
> Each of those birdies around 14030 are synchronized to the clock on someone's
> router or switch. If you have neighbors, you'll hear a birdie for each of
> them. Identify your own by killing power to your router or switch. Ethernet
> also produces birdies around 21060, on the low end of 10M CW, and the low end
> of 6M. There are also a few on 30M. These are the ones I've noted because I'm
> a CW op -- if you work SSB, you may find more. :)
>
>> Well, actually, I don't KNOW that I have only two. On 40 and 80 there
>> appears a
>> "wandering" bit ofpretty loud crap that is pretty broad, and wonders up and
>> down the band at
>> intervals.
>
>> I haven't tracked that one down yet, but suspect it is some sort of
>> switching power
>> supply somewhere close by.
>
> Right -- they are harmonics of Switch-Mode Power Supplies. Everything from
> wall warts to computers to TVs to battery chargers of all sorts.
>
>
>> Well, we have both wired and wireless in our local net. Up to 5 computers, 3
>> of which are
>> hardwired.
>>
>> And, at this point, then, there isn't much I can do about them, I would
>> suppose.
>>
>> I have added multiple turns of cat 5 through large ferrite "chokes", but
>> mostly to keep my
>> transmitter out of the hub. That worked.
>
> Long cables will need a choke at both ends, and you may also need a choke on
> the power supply cable.
>
> Consider adding WiFi adapters to your wired computers to eliminate radiation
> from those cables. I've been using nothing but WiFi in my home and shack
> (which is in a detached garage), and have all the bandwidth I need -- enough
> to support streaming audio and video.
>
> 73, Jim K9YC
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