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Post by Stratmangler on Aug 23, 2018 18:57:03 GMT
I've also never put them on the incoming mains cables from outside. Ours can be got to easily though... Why would you want to? Unless you're surrounded by factories and trading estates the likelihood of mains borne RFI is very low. Engineering workshops that do welding are good for generating lots of mains borne RFI, as is a lot of heavy plant.
Your main source of mains borne RFI is going to be found within the place you call home.
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Post by MikeMusic on Aug 23, 2018 19:27:37 GMT
Little surprises me with mains now
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Post by MikeMusic on Aug 23, 2018 19:34:40 GMT
The picture on the TV has improved. Hadn't occurred to me that could get better so wasn't paying attention. Gets better
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Post by MartinT on Aug 23, 2018 20:48:20 GMT
Unless you're surrounded by factories and trading estates the likelihood of mains borne RFI is very low. I'm surrounded by farms. I used to be very aware of when they were running big machinery but that seems to have gone since the village was re-cabled.
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Post by MartinT on Aug 23, 2018 20:51:22 GMT
The picture on the TV has improved. We run ours on an Isotek Mira filter (the TV in the Visual socket and the rest of the equipment in the Component socket).
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Post by MikeMusic on Aug 24, 2018 8:40:43 GMT
New to me, no surprise. Just under £300
Just for the TV set up ?
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Post by MartinT on Aug 24, 2018 9:29:18 GMT
Yes, the TV and associated audio equipment.
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Post by brettj on Aug 25, 2018 21:26:41 GMT
Just bought some chokes from eBay. Cheap as chips...
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Post by Deleted on Aug 25, 2018 21:47:57 GMT
One on the AC cable and another on the DC side. Martin, can you elaborate on this please?I have zero electrical knowledge. I assume it means put the clips on all of the cables of the items you want to treat? And also the leads of any mains blocks they happen to plugged into? Another question: If you had your hi fi on it’s own mains - independent from the rest of the property, would this circumvent the need to use chokes?
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Post by MartinT on Aug 26, 2018 10:39:27 GMT
1) I think I was talking about power blocks/chargers where there is a mains cable and a DC cable. Choose the smallest snap-choke that fits for a tight coupling.
2) No, because noise also comes in from other properties.
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Post by Deleted on Aug 26, 2018 12:38:32 GMT
1) I think I was talking about power blocks/chargers where there is a mains cable and a DC cable. Choose the smallest snap-choke that fits for a tight coupling. 2) No, because noise also comes in from other properties. Thanks. So do you use these on your audio power cables as well?
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Post by MartinT on Aug 26, 2018 12:47:13 GMT
No, the Coherent cables are too thick.
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Post by MikeMusic on Aug 29, 2018 13:41:50 GMT
Added bonus I now realise is improving the sound quality on any system in the house. Kitchen/diner has taken a step up in sound quality. More flowing and musical, slightly more bass
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Post by Stratmangler on Aug 29, 2018 15:04:11 GMT
Added bonus I now realise is improving the sound quality on any system in the house. It's surprising what suppressing all those SMPS spikes can do, isn't it? I am really pleased with the way things sound around here, now that I've quietened down all the crap on the power.
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Post by MikeMusic on Aug 29, 2018 15:11:47 GMT
Added bonus I now realise is improving the sound quality on any system in the house. It's surprising what suppressing all those SMPS spikes can do, isn't it? I am really pleased with the way things sound around here, now that I've quietened down all the crap on the power. Absolutely I shall be looking at everything in the house. A couple of phones on wall warts, a PC screen or two come to mind. Forgot the alarm clock Martin mentioned ... Wonder what else. Will find all the suspects, play a track, fit the chokes and play again. Can this continue ?!
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Post by Stratmangler on Aug 29, 2018 15:30:30 GMT
Don't forget to do your laptop PSU leads. I know that you'll already have one at the machine end of the cable - it would be better sited as close to the PSU as possible. Same thing with the mains lead.
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Post by MikeMusic on Aug 29, 2018 17:28:26 GMT
Thanks. John had already told me that one. Not obvious to me before
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Post by MartinT on Aug 29, 2018 20:52:21 GMT
Chris's trick of winding a thin cable all around the choke in a loop (see photo) increases inductance and effectiveness.
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Post by Deleted on Aug 29, 2018 21:36:03 GMT
Is this trick only for SMPS or is it worth doing everything in the house and SMPS happen to be the worst offenders?
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Post by Stratmangler on Aug 29, 2018 21:41:08 GMT
Linear PSUs do not generate RFI. Most everything in the house will have SMPS.
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