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Author Topic: Ethernet As Unintended VHF Radiator  (Read 663 times)

Offline RobRich

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Ethernet As Unintended VHF Radiator
« on: November 11, 2020, 0853 UTC »
Apparently a couple of Raspberry Pi 4s using an un-shielded network cable can suffice for 125MHz transmission of CW up to 100m distance using a decent receiver with a simple directional moxon antenna.

https://lipkowski.com/etherify/

On a side note, the FAA and FCC do not take kind to interference in the VHF air band. YMMV.
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Offline ThaDood

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Re: Ethernet As Unintended VHF Radiator
« Reply #1 on: November 11, 2020, 2004 UTC »
That's a battle with Ethernet cable here on the FM BC band, aviation, and even 2M band. I have ferrite chokes on every one here, as to not wipe-out the VHF Mid and High bands. With DSL internet here, there's no way that I get speeds close to 100MHz here. 10MHz, sometimes. BTW, that's the way Cold War espionage worked by RX'ing leaky data cables from various gov facilities. can still happen today.
I was asked, yet another weird question, of how I would like to be buried, when I finally bite the big one. The answer was actually pretty easy. Face-down, like a certain historical figure in the late 1980's, (I will not mention who, but some of you will get it, and that's enough.) Why??? It would be a burial that will satisfy everyone: (1) My enemies will say that it will show me where to go. (2) On the same point, I can have my enemies kiss my butt. (3) It will temporarily give someone a place to park a bicycle. See??? A WIN / WIN for everyone.

 

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