Some decades ago, when I was testing computers, accessories, and third-party
line cards at Tandy, I discovered that some of them transferred digital noise
from inside directly out onto external devices, or made their own; a few
monitors screamed like a banshee because the CRT return for video was a just
one wire from the CRT 's iron mask to the video driver, and a television line
card tuner, while quiet enough when it was displaying a TV signal on a
store-brand monitor, was itself noisier than a brass band on steroids when it
wasn't delivering video of its own. THAT, thank goodness, isn't a problem now.
But you can never be sure.
Broadcast studio devices can cost quite a bit more than cheap Chinese ones but
we should remember what Julius Caesar said about buying things at the
neighborhood Coliseum: "Caveat Emptor", or the like. Back in the days when we
could try things out in the store, I would carry a wideband scanner or 2m – 440
handy talkie with similar HF-VHF coverage or more, and test what I bought
before I took it home.
Cortland
-----Original Message-----
>From: Joe <nss@mwt.net>
>Sent: Sep 15, 2020 7:45 PM
>To: rfi@contesting.com
>Subject: [RFI] Sound Card
>
>For my playing of wav files for contesting I am going to dedicate a nice
>small USB type sound card ya know looks like a thumb drive?
>
>Now in thinking of RF issues of RF getting into it. Where would be the
>best placement of it to lessen the possibilities of RF getting into it?
>
>Having it right at the computer, and run the AUDIO cable long enough to
>reach the radio.
>
>OR
>
>Have it right at the radio, and run a USB extension cord to the computer.
>
>What is less prone to have RF Issues?
>
>Joe WB9SBD
>_______________________________________________
>RFI mailing list
>RFI@contesting.com
>http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|