Oh, the ferrites I'm using are cheaper than the clamp one, and if it was only
wifi, no big deal. It is the washing machines with VFDs, the switching power
supplies, etc. all cheap and easy enough for one-two neighbors, but when you
are talking 30 of them...
--
73 de KG2V
Charlie
> On Jul 25, 2015, at 7:18 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>
>> On Sat,7/25/2015 3:20 PM, Charles Gallo wrote:
>> 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
>
> I know your pain -- I spent 42 years in Chicago mixed residential/light
> industrial neighborhoods before escaping to somewhat rural NorCal 9 years ago.
>
> Remember though that you don't need to spend big bucks on ferrite cores to
> choke Ethernet cables for this sort of RFI. Clamp-ons that are 0.5-in i.d.
> are big enough to choke Ethernet cables. Get together with your local hams
> and do a group purchase. #43 mix is less expensive than #31, and all you need
> above 5 MHz. Study the Fair-Rite catalog to find clamp-ons about 1-inch long
> and at least 1/2-in i.d. You'll start getting quantity breaks with 100
> pieces or more. 3/4-in i.d. cores are a bit more expensive, but will handle
> video cables and many power cables, so you may build more quantity that way.
> My last group buy was for about 1,000 3.4-in i.d. #31 cores. We paid $2.30
> plus tax and shipping. That was more than a year ago.
>
> Try Dexter Magnetics near Chicago.
>
> 73, Jim K9YC
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