Hi Nick,
Success!!! I installed 10nF C0G between input returns and FSP enclosure at female RCAs with short leads, and no RF is getting in. Tested several times during this evening and it is no clicks anymore.
I left ferrite and as I mentioned, it is 3 loops of TT cable on it.
Now, it is very nice and quite background at max volume. Thank you a lot.
For SUTs, I have Stevens and Billington SUTs with 1:5/10/20. They are running about $750 a piece. They are sweet and I can use them with my Triode Japan Corp. made MM phono ( BTW, which is based on Marantz 7c with some alterations). Unfortunately for SUTs, that setup is not getting close to the transparency and details which I hear from Salas FSP.
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Success!!! I installed 10nF C0G between input returns and FSP enclosure at female RCAs with short leads, and no RF is getting in. Tested several times during this evening and it is no clicks anymore.
I left ferrite and as I mentioned, it is 3 loops of TT cable on it.
Now, it is very nice and quite background at max volume. Thank you a lot.
For SUTs, I have Stevens and Billington SUTs with 1:5/10/20. They are running about $750 a piece. They are sweet and I can use them with my Triode Japan Corp. made MM phono ( BTW, which is based on Marantz 7c with some alterations). Unfortunately for SUTs, that setup is not getting close to the transparency and details which I hear from Salas FSP.
Sent from my iPhone using Tapatalk
Nice to know that this simple measure worked for cleaning up the remains of that elusive RF nuisance in your rig 
I had 4 loops on ferrite (sorry for misleading you) and during test I discovered that less than 3 loops setup is allowing clicks to be sounded. So, with 2 loops I still hear some, but quieter then with 1 loop. 3 Lops is absolutely nothing. Can't notice about any sound change yet. All sounds the same with and without ferrite.
Since the signal in that place is tiny and it can't saturate the ferrite plus there is no overall feedback in the FSP for the ferrite loops to can alter some crucial phase margin negatively, I guess its a fine practical solution in your case. No odd sonic effects indeed, as you concluded in the actual rig test. The turns you used are very few anyway. Down to absolute necessary. No worries then.
Yes, io input cables close to the end with RCAs. Tried 3 ferrite sizes and choose mid one. Small did not work at all and big one was too heavy. Please see attached picture.
I wish I could see what is in the blackness.
I see a very thin wire going into the blue sleeve and an equal diameter wire going into the red sleeve.
These wires each feed a separate RCA.
What are those wires?
Further back (away from the RCA+Sleeves) I see some insulation wrapped around the wires and then I see a thicker black wire. That thicker wire is looped through the ferrite. What is inside that thicker wire?
I can see the very thin black wire. But I can't see where it comes from, nor where it goes to.
I see a very thin wire going into the blue sleeve and an equal diameter wire going into the red sleeve.
These wires each feed a separate RCA.
What are those wires?
Further back (away from the RCA+Sleeves) I see some insulation wrapped around the wires and then I see a thicker black wire. That thicker wire is looped through the ferrite. What is inside that thicker wire?
I can see the very thin black wire. But I can't see where it comes from, nor where it goes to.
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