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Post by nicholas on Jan 30, 2023 20:33:18 GMT
Damien, are you using an EMI or RFI meter to establish before and after radiation readings?
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Post by stellabagpuss on Jan 30, 2023 20:40:24 GMT
I suggest do it stages as you can then identify if you go weong and then revers the process I plan to just to sheild the power cables and 1 x ribbon firstand BNC cable, rear of the LCD Board 2nd, the painting of the transformers casing 3rd. Damping 4th.
These are pretty minor mods, and should in theory, just help keeping noise levels lower.
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Post by mattspl on Jan 30, 2023 21:08:14 GMT
What an interesting week we had with the screening, my set up has now gone up a few levels,thanks to copper shielding tape and Rustins G Sheild. I have to thank John for letting in on the Ground Box tip, his recomandation after putting Faraday Tape on the Box set a light bulb off in my head, and the fact I'd been sat on tin of G Sheild for months,was an opportunity not to be missed. As you probably read, John and myself where amazed at the effect this had on our ground boxes, mine on the ground was subtle to OMG. I also learnt a few things along the way, and it's a reminder about shielding, you need to totally cover your ground box in a outer shielding, be it with Faraday or Copper Tape or Rustins ,or Rustins in a closed carboard box,for the shielding to work properly.
You can demostrate that with a mobile phone app, or a SW FM portable radio, once covered or in a box closed, the signal should be reduced or gone. It's worth pointing out that doing this test on the LW MW bands is a waste of time, due to the low frequencies,and what is call the skin effect, you would have to have a thick copper or metal covering for it to be effective. One things for sure, just using cardboard sheilds on one or two sides won't work, and you can test this yourself,by using the methods I have outlined. It's really ironic that after I applied all the shielding to my set up,plugs connectors etc and it's sounding superb, that I have to report I will be without my HI-FI for about 4 weeks !! We have the builders in doing an extention. Just my luck, but it does bring my other project forward, I can sit around twiddleling my fingers. O, I nearly forgot, I also added some sheilding to my Leaf Audio USB device, and a bit for the crystals and some sorbanthane damping I had kicking around. Again a very positive result,thats removed a the trace of harshness, it's hard to say in regards to noise floor, a it's already low, but the flow is better, and it's seems more relaxed...if thats a thing! My next plan to open up my Gustard R26 and do a bit of shielding inside  20230130_123823 by Damien Read, on Flickr I am open to suggestions, but as you can see from my unit, sheilding can be applied on the PSU cables, a couple of ribbon cables. The transformers have there own covers, I'm thinking some G Shield on the covers, the power section,has been sectioned away,so shielding will help on the metal barrier. Another area that can't been seen in my photo, the the back of the LCD display that overlooks all the board. A bit of damping for the case,,basic stuff really. I don't intend to replace any components, it's beyond my skill set. Thankfully, this is pretty easy to carry out. Feel free to suggest anything, and I'll try to give you a update picture once finished. Do you have any Mad Scientist Graphene contact enhancer? If you’re opening up the Dac, I’d apply it anywhere possible inside. |
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Post by stellabagpuss on Jan 30, 2023 21:27:41 GMT
Damien, are you using an EMI or RFI meter to establish before and after radiation readings? Probably best to read this post Nick
You can just use your ears with a radio, I have used my Airspy Discovery + SDR unit but it's a bit OTT, Signals Present outside, inside box signals it's gone, I was going to post a photo, but there's not much point.
Using a SDR can be a good insight, as you can actually see on your PC display how much RFI your components dish out, my Nord amps dish out a lot, and it give you a understanding of why many Hi END products place there PSUs in another box.
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Post by stellabagpuss on Jan 30, 2023 21:34:53 GMT
What an interesting week we had with the screening, my set up has now gone up a few levels,thanks to copper shielding tape and Rustins G Sheild. I have to thank John for letting in on the Ground Box tip, his recomandation after putting Faraday Tape on the Box set a light bulb off in my head, and the fact I'd been sat on tin of G Sheild for months,was an opportunity not to be missed. As you probably read, John and myself where amazed at the effect this had on our ground boxes, mine on the ground was subtle to OMG. I also learnt a few things along the way, and it's a reminder about shielding, you need to totally cover your ground box in a outer shielding, be it with Faraday or Copper Tape or Rustins ,or Rustins in a closed carboard box,for the shielding to work properly.
You can demostrate that with a mobile phone app, or a SW FM portable radio, once covered or in a box closed, the signal should be reduced or gone. It's worth pointing out that doing this test on the LW MW bands is a waste of time, due to the low frequencies,and what is call the skin effect, you would have to have a thick copper or metal covering for it to be effective. One things for sure, just using cardboard sheilds on one or two sides won't work, and you can test this yourself,by using the methods I have outlined. It's really ironic that after I applied all the shielding to my set up,plugs connectors etc and it's sounding superb, that I have to report I will be without my HI-FI for about 4 weeks !! We have the builders in doing an extention. Just my luck, but it does bring my other project forward, I can sit around twiddleling my fingers. O, I nearly forgot, I also added some sheilding to my Leaf Audio USB device, and a bit for the crystals and some sorbanthane damping I had kicking around. Again a very positive result,thats removed a the trace of harshness, it's hard to say in regards to noise floor, a it's already low, but the flow is better, and it's seems more relaxed...if thats a thing! My next plan to open up my Gustard R26 and do a bit of shielding inside 20230130_123823 by Damien Read, on Flickr I am open to suggestions, but as you can see from my unit, sheilding can be applied on the PSU cables, a couple of ribbon cables. The transformers have there own covers, I'm thinking some G Shield on the covers, the power section,has been sectioned away,so shielding will help on the metal barrier. Another area that can't been seen in my photo, the the back of the LCD display that overlooks all the board. A bit of damping for the case,,basic stuff really. I don't intend to replace any components, it's beyond my skill set. Thankfully, this is pretty easy to carry out. Feel free to suggest anything, and I'll try to give you a update picture once finished. Do you have any Mad Scientist Graphene contact enhancer? If you’re opening up the Dac, I’d apply it anywhere possible inside. Splash It All Over !
I haven't tried this stuff yet, although whats interesting Graphene is the very same stuff thats in Rustins G Shield Electro Smog .....Very Interesting |
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Post by mattspl on Jan 30, 2023 21:41:06 GMT
It’s amazing stuff. I really didn’t anticipate such an improvement. It’s a bit of hard work to apply it everywhere, but worth it. Once you’ve done a few connections, you’ll want to do them all.
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Post by nicholas on Jan 30, 2023 22:10:46 GMT
Damien, are you using an EMI or RFI meter to establish before and after radiation readings? Probably best to read this post Nick
You can just use your ears with a radio, I have used my Airspy Discovery + SDR unit but it's a bit OTT, Signals Present outside, inside box signals it's gone, I was going to post a photo, but there's not much point.
Using a SDR can be a good insight, as you can actually see on your PC display how much RFI your components dish out, my Nord amps dish out a lot, and it give you a understanding of why many Hi END products place there PSUs in another box.
Thanks, Damien, my reason for asking is that in my early going with an EMI meter I detected a significant amount of radiation around my rack, particularly near power supplies. Planning to play around with some Faraday cloth once I decide on one appropriate for my use case. |
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Post by stellabagpuss on Jan 30, 2023 22:39:55 GMT
Probably best to read this post Nick
You can just use your ears with a radio, I have used my Airspy Discovery + SDR unit but it's a bit OTT, Signals Present outside, inside box signals it's gone, I was going to post a photo, but there's not much point.
Using a SDR can be a good insight, as you can actually see on your PC display how much RFI your components dish out, my Nord amps dish out a lot, and it give you a understanding of why many Hi END products place there PSUs in another box.
Thanks, Damien, my reason for asking is that in my early going with an EMI meter I detected a significant amount of radiation around my rack, particularly near power supplies. Planning to play around with some Faraday cloth once I decide on one appropriate for my use case. To be honest PSU are very hard to totally get rid of noise wise. You'll be able to reduce the some of the noise,but if it's low frequency,you'll struggle. And it's totally normal for PSU to radiate EMF,if they are separate PSUs,consider moving them away from other components. Of course if there in the same box, you can try to sheild the cables to reduce noise, but the reality is you'll always get a EMF reading from any powered component, sheilding is an attempt to reduce the possibility of noise reduction. |
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Post by stellabagpuss on Jan 30, 2023 23:01:06 GMT
It’s amazing stuff. I really didn’t anticipate such an improvement. It’s a bit of hard work to apply it everywhere, but worth it. Once you’ve done a few connections, you’ll want to do them all. Amazing. as it has the same magic ingredient Graphene that Rustins G Sheild uses. Is this stuff waterbased, l take it you apply a small amount, then spread out on connector, does it leave the connector with a light black finish? |
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Post by mattspl on Jan 30, 2023 23:56:19 GMT
It is very interesting that the paint also contains Graphene. Makes you wonder what exactly it does in both cases.
The Mad Scientist stuff seems to have a light oil base and appears gloss black. You apply it like paint with the supplied foam applicators, then dab/gently rub the liquid off with tissue so you’re left with just a faint Smokey colour to your connections, barely distinguishable from untreated connections.
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Post by MartinT on Jan 31, 2023 6:02:15 GMT
Is this stuff waterbased, l take it you apply a small amount, then spread out on connector, does it leave the connector with a light black finish? It leaves it with a feint greying, no more. A small tube lasts a long time. |
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Post by stellabagpuss on Jan 31, 2023 6:45:32 GMT
That's really interesting, as that's the same thing that happens if you try to clean up G Shield, l'll have try the same thing with G Shield at some point
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Post by MartinT on Jan 31, 2023 8:05:34 GMT
l'll have try the same thing with G Shield at some point Noooo! G Shield is water-based and gunky goo. Don't put that on your contacts! |
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Post by stellabagpuss on Jan 31, 2023 8:30:27 GMT
l've had to clean up from a small slip, and it sees to leave a fine layer of Graphene.
What's interesting Mad Science claims :It will wash off with detergent (eg dishwash liquid) and water", that doesn't sound oil based to myself, but it could just be a trace of oil.
Interesting, as Graphene looks like the magic ingredient
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Post by MartinT on Jan 31, 2023 9:12:54 GMT
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Post by stellabagpuss on Jan 31, 2023 11:07:37 GMT
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Post by MikeMusic on Jan 31, 2023 11:40:56 GMT
Graphene - thinks. Coming into the mainstream now out of the scientists bleeding edge stellabagpuss if the builders are in can you improve the mains feed for the system ? |
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Post by palace on Jan 31, 2023 11:49:25 GMT
Presumably so does the mad scientist offering can buy from ebay cheap and make your own |
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Post by stellabagpuss on Jan 31, 2023 12:05:03 GMT
Correct, you need to find a suitable oil.
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Post by stellabagpuss on Feb 5, 2023 15:59:19 GMT
So while I have light during daylight hours, I could press on with the R26 sheilding of the cables, I have marked where this has been applied in RED It's not to OTT, simply copper shielding tape, then covered in insulation tape, on all PSU cables, BNC coax in to board and ribbon cable connector.
I have also applied to some Rustins G Sheild to the internal section of the R26 case, where the PSU section is housed, and some more shielding for the on and off switch.
I've also made a shield for the back of the display panel, hopefully will had a photo of that as well.
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