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.
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Congratulations 
Nice to know that this simple measure worked for cleaning up the remains of that elusive RF nuisance in your rig 🙂
Nice to know that this simple measure worked for cleaning up the remains of that elusive RF nuisance in your rig 🙂
Ferrites are widely reputed to affect the audio signal.
Using more loops than is required may be introducing distortion, or frequency manipulation, that is excessive.
Adjust to measure/hear how few loops, or no loop, are required to remove the interference.
Using more loops than is required may be introducing distortion, or frequency manipulation, that is excessive.
Adjust to measure/hear how few loops, or no loop, are required to remove the interference.
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.
@ alexkosha
I did not follow all your periples until you completely eliminated the noise but I am very interested as I did experience the same kind of trouble in one of my setups.
Where did you place the ferrites ? in the input cables ?
I did not follow all your periples until you completely eliminated the noise but I am very interested as I did experience the same kind of trouble in one of my setups.
Where did you place the ferrites ? in the input cables ?
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.
An RCA/Phono is a 2wire connection.
Is that thin black wire going into the RCA a coaxial cable?
Is that thin black wire going into the RCA a coaxial cable?
I looked up rg174 and it varies from 0.102" (2.6mm) to 0.11" (2.8mm).
That looks even smaller.
And do both coaxials go into that outer jacket that is looped around the ferrite?
That looks even smaller.
And do both coaxials go into that outer jacket that is looped around the ferrite?
My last-final setup is Cardas quad with shield. If I recall, it is 2 twisted 34AWG pairs with Teflon, and all that is shielded with 1 braid and they use Si tube on top. Total Dia is about 3mm.
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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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For RCruz...
Yes, 10nF from female (back panel) return to chassis. Short leads...
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Yes, 10nF from female (back panel) return to chassis. Short leads...
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