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Old 28th March 2020, 06:02 AM   #11
Indiglo is offline Indiglo  Australia
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Mostly what Jim discusses relates mostly to AM broadcast and Ham HF radio transmitter RFI into microphones at close range, its unlikely the average suburban home will see any RF signal levels of that magnitude.

My advice to the op is to avoid the audiophile fad of silver cables and just use some decent shielded cable and connectors.

Last edited by Indiglo; 28th March 2020 at 06:10 AM.
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Old 29th March 2020, 08:36 PM   #12
myleftear is offline myleftear  Switzerland
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ferrite for interconnect...
Thanks for all these inputs.
I understand both the pro and contra (not technically, but "conceptually")...
When I was thinking about making those cables, it was about finding out wether the use of shielded cable has an audible influence... (of course, the silver conductor is tempting too... :roll eyes:

BTW, I already went very low and used twisted 0.3mm enameled copper wire, no shields, and ugly, cheap rca-plugs. It worked and was fun, but I didn't went very far into it...
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Old 29th March 2020, 10:22 PM   #13
Douglas Blake is offline Douglas Blake  Canada
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Quote:
Originally Posted by myleftear View Post
Hi friends

I was tempted to build this interconnect: DIY Silver RCA Interconnect Cables
Ummm... no. Always, always, always use shielded "microphone" cable for RCA interconnects. Well, unless you want your system channelling the local CBer... "Breaker Breaker Any Taker"...

The snap on ferrite beads won't hurt your audio response at all. Most have no effect under about 2 mhz. But when deployed at your amp inputs they can help keep that pesky CBer out... When I make interconnects, I put them on as a matter of course. They're cheap and they're not going to make anything worse, so why not.

Recent phone call: "Why is my stereo humming?" ...
Me: "Because it doesn't know the words."

Last edited by Douglas Blake; 29th March 2020 at 10:26 PM.
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Old Yesterday, 01:42 PM   #14
Speedskater is offline Speedskater  United States
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Mix 77 ferrite is good from 100 kHz to 50 MHz
Mix 75 ferrite is good from 150 kHz to 30 MHz

While ferrite mixes 31, 43, 52 & 61 are all for much higher frequencies.
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Old Yesterday, 05:13 PM   #15
myleftear is offline myleftear  Switzerland
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Quote:
Originally Posted by Speedskater View Post
Mix 77 ferrite is good from 100 kHz to 50 MHz
Mix 75 ferrite is good from 150 kHz to 30 MHz

While ferrite mixes 31, 43, 52 & 61 are all for much higher frequencies.

Thank you, speedskater
Since I don’t know of any specific frequencies to shield the signal from, a wider bandwidth (100kHz - 50mHz) would be a better choice I presume?
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Old Today, 08:41 AM   #16
Indiglo is offline Indiglo  Australia
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Randomly suggesting ferrites is not the appropriate method.

You need to determine what frequency range, how much attenuation you require, how many loops of cable need to pass through the ferrite, what is the appropriate ferrite material, what core size or cable diameter is needed.

If you use shielded cable and not experiencing any RF EMI then you don't need ferrites.

Ferrite 77 is mainly used as a toroid in switchmode power supplies.
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Old Today, 08:47 AM   #17
myleftear is offline myleftear  Switzerland
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Quote:
Originally Posted by Indiglo View Post
Randomly suggesting ferrites is not the appropriate method.

You need to determine what frequency range, how much attenuation you require, how many loops of cable need to pass through the ferrite, what is the appropriate ferrite material, what core size or cable diameter is needed.
I totally understand that this should be a „targeted approach“

No way am I able to achieve this.

So I‘ll go the killall-way and use shielded wire ferrite for interconnect...
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Old Today, 08:53 AM   #18
Indiglo is offline Indiglo  Australia
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If you want the expensive audiophile look you can always fit some fancy cable sleeving over the top and nobody will know the difference

Cable Sleeving

Last edited by Indiglo; Today at 08:56 AM.
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Old Today, 09:27 AM   #19
myleftear is offline myleftear  Switzerland
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ferrite for interconnect...
Default ferrite for interconnect...

Quote:
Originally Posted by Indiglo View Post
If you want the expensive audiophile look you can always fit some fancy cable sleeving over the top and nobody will know the difference

Cable Sleeving

I could use a vacuum-tube for sleeving to get a reeaallly hefty look. ferrite for interconnect...

(Actually, I prefer stuff like that: Google-Ergebnis für https://i.ebayimg.com/images/g/pygAAOSwol5Y0ecD/s-l400.jpg )
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