Locked Re: Suspect RFI into computer

chas cartmel


I think you are on the right track.
I have ferrite chokes, mainly clamp-ons, on every lead into the computer and also on any power supply or connecting leads, mains and PSU. If possible I use several turn inside the choke.
My equipment is all connected to a single earthing point which ultimately goes to an external earth with 3 4 foot grounding rods in the garden.

I had RFI, but can now run 200W SSB into any of my antennae without problem.

73 Charlie



Stay safe out there




From: main@WSJTX.groups.io [mailto:main@WSJTX.groups.io] On Behalf Of wojtasczyk@...
Sent: 31 August 2020 17:32
To: main@WSJTX.groups.io
Subject: [WSJTX] Suspect RFI into computer


I am new to the digi modes and am slowly both figuring this out and understanding how it works.  But I suspect that I have getting RFI into my computer causing problems.  I am using an IC-706MKIIG into an antenna tuner feeding a 130 long wire antenna.  I am able to tune to my freq in CW with no problems to the computer.  But when I begin to operate FT*, about after every other or third transmission, WSJT programs says that there is a rig control error and if I want to reconfigure the rig control systems.  I click ok and re-enable the TX and am able to continue TXing to complete the QSO.  In the most extreme it causes my computer to reboot.  I've increased the separation of my turner from the computer and have added a number of RF filters to a number of leads connecting to the back of the computer (I've got more now to continue placing the filters on a few remaining leads).  Am I pursuing the correct problem?

Thank you for all your help,
John Wojtasczyk

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