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Author Topic: Ferrites, RF Chokes  (Read 1922 times)

Offline ByteBORG

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Ferrites, RF Chokes
« on: February 19, 2014, 0240 UTC »
This may have been discussed before but EXACTLY where, and on what wires do I install them
when running a computer with an SDR ?

Oops, this may be the wrong category. Sorry...... :o
« Last Edit: February 19, 2014, 0242 UTC by ByteBORG »
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Offline ChrisSmolinski

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Re: Ferrites, RF Chokes
« Reply #1 on: February 19, 2014, 1421 UTC »
This is what worked for me, YMMV: http://www.radiohobbyist.org/blog/?p=1374
Chris Smolinski
Westminster, MD
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Offline ByteBORG

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Re: Ferrites, RF Chokes
« Reply #2 on: February 19, 2014, 1519 UTC »
Thanks for the link, Chris.  :)
+ Always listening for that elusive RF...
+ microtelecom Perseus / FunCube Dongle Pro+ / FT450-D / FT101-D
+ RF Sys EMF  / RF Sys MLB w/Long Wire / HomeBrew Inverted "V" cut for 43 mtrs.
+ 73 & Good DX !!!
+ Please eQSL to: s<dot>csiki<at>comcast<dot>net

Offline RCCI

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Re: Ferrites, RF Chokes
« Reply #3 on: February 20, 2014, 0313 UTC »
My shack was filled with RFI devices with computer, TV set,  fluorescent overhead lights, etc. Ferrite cores were on cords and had a minimal positive effect. Real Frustration City. Constant S8-9 noise.

Came into a TRIPP-LITE Internet Office UPS  battery back up, surge protector, and FILTER, for $8 at a Salvation Army. Pluggd the radios in...and noise level dropped 3db. Noise signal about S5 now. What a difference.

My 2 sense worth :D
+ Equipment: Yaesu FRG 100B, Kenwood R-1000, Yaesu FRG7,
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rdla4

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Re: Ferrites, RF Chokes
« Reply #4 on: February 20, 2014, 2158 UTC »
I have the "snap" ferrites on everything coming out of the PC.... USB keyboard and mouse, DVI, usb to the SDRIQ, if its a cable coming out of the pc it has one! I try to keep mine close to the pc, and I wind as many turns of the cable as I can fit thru the opening. Power cables---choke those as well.

I also have them on coaxial cables as they enter the house.

My noise floor is quite low here, despite Two PCs in the room, and several RF generating devices in other parts of the house.

In my case, I could watch noise blobs fade out as I added these things.