[RFI] ethernet EMI revisited - questions for the pros

Michael Martin mike at rfiservices.com
Wed Nov 26 06:07:14 EST 2008

Without too many details, I once saw a couple tech pondering over what to do
about a broken fiber and no splices. I cut the fiber connected them together
using a butt splice, really, and they were back in operation.
I know, I hear you guys, but it true! Sometimes you have to improvise.

Best Wishes & Happy Holidays,
Mike Martin
RFI Services
6469 Old Solomons Island Rd
Tracys Landing, Md 20779

-----Original Message-----
From: rfi-bounces at contesting.com [mailto:rfi-bounces at contesting.com] On
Behalf Of Martin Ewing
Sent: Wednesday, November 26, 2008 2:55 AM
To: rfi at contesting.com
Cc: Leigh at wa5znu.org
Subject: Re: [RFI] ethernet EMI revisited - questions for the pros

On Tue, Nov 25, 2008 at 5:29 PM, Leigh L. Klotz, Jr. WA5ZNU <
Leigh at wa5znu.org> wrote:

> ...
> Here's what I did: I went to fiber.  It's not that expensive, especially
> surplus or on eBay.  Fiber with ST connectors (they look like tiny BNC
> connectors) is fairly cheap.  I've found ten-dollar 10 MBbit PCI cards
> that look exactly like copper Ethernet cards, only with a fiber transducer
> instead of ethernet magnetics.  I've found $40 transition boxes that go
> between 10MBit or 100MBit and fiber.   Stick a 10MBit one of these on your
> router and the PCI Card in your computer and you have only eliminated
> 100MBit from your router, and achieved total galvanic isolation from your
> computer to the ethernet box (note: don't do this if you are that one guy
> in DC who has *more* than 10MBit from your cable provider).
> ...
> Leigh/WA5ZNU

How do you do random length "infrastructure" cabling with fiber?  All I see
are pre-cut and terminated jumpers for sale.  I assume that means that
cutting and terminating fiber is a non-trivial operation?

73 Martin AA6E

Martin Ewing, AA6E
Branford, CT
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