[RFI] Ethernet RFI UPDATE

[WA3GIN]

YES,  I didn't notice any improvement when I applied the grounding.  I did 
measure about .128 volts AC between the building ground and the telco 
ground.

Now up to 1.2KW without issues.  Seems I was focused mostly on the barn 
where the radio gear is located and the issue appears to be at the house. 
Apparently, the house wiring is acting as an antenna and delivering enough 
of the 40m signal around to cause the Ethernet extender box to fault.  Today 
I'll work on the house end of the circuit.

73,
dave
wa3gin

73,
dave
wa3gin
----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: "Rfi" <rfi at contesting.com>
Sent: Sunday, July 01, 2007 1:01 AM
Subject: Re: [RFI] Ethernet RFI UPDATE


> On Sat, 30 Jun 2007 12:53:11 -0400, WA3GIN wrote:
>
>>I don't know if this next change has created was worth doing or
> not but I took the CAT5 twisted pairs of telco wire that unused in
> the 6 pair trunk line running between the barn and house (1,000ft)
> and terminated them to ground at both ends of the line.  My
> thinking was that if these pairs were  not terminated they might
> act as receive wires and re-radiate RF into the active circuit
> pair. I know this is a stretch considering the cable is shielded
> and buried.  It doesn't appear to have hurt performance of the
> Ethernet circuit.
>
> REPEAT AFTER ME: THE EARTH IS NOT A SINK INTO WHICH HUM, BUZZ, AND
> RFI IS POURED. GROUNDING THINGS IS ALMOST NEVER A CURE FOR ANY OF
> THESE PROBLEMS, AND IS OFTEN A CAUSE OF THEM.
>
> THE EARTH IS NOT A SINK INTO WHICH HUM, BUZZ, AND RFI IS POURED.
> GROUNDING THINGS IS ALMOST NEVER A CURE FOR ANY OF THESE PROBLEMS,
> AND IS OFTEN A CAUSE OF THEM.
>
> THE EARTH IS NOT A SINK INTO WHICH HUM, BUZZ, AND RFI IS POURED.
> GROUNDING THINGS IS ALMOST NEVER A CURE FOR ANY OF THESE PROBLEMS,
> AND IS OFTEN A CAUSE OF THEM.
>
> THE EARTH IS NOT A SINK INTO WHICH HUM, BUZZ, AND RFI IS POURED.
> GROUNDING THINGS IS ALMOST NEVER A CURE FOR ANY OF THESE PROBLEMS,
> AND IS OFTEN A CAUSE OF THEM.
>
> THE EARTH IS NOT A SINK INTO WHICH HUM, BUZZ, AND RFI IS POURED.
> GROUNDING THINGS IS ALMOST NEVER A CURE FOR ANY OF THESE PROBLEMS,
> AND IS OFTEN A CAUSE OF THEM.
>
> THE EARTH IS NOT A SINK INTO WHICH HUM, BUZZ, AND RFI IS POURED.
> GROUNDING THINGS IS ALMOST NEVER A CURE FOR ANY OF THESE PROBLEMS,
> AND IS OFTEN A CAUSE OF THEM.
>
> 73,
>
> Jim K9YC
>
>
>
>
>
>
>
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