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RCA Capping? : |
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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PS. Although we have not submitted our products for EMC testing in the UK, our S Korean importer had to do it to comply with new laws over there. All passed!
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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Drewan77
Senior Member Joined: 25 May 2013 Location: Chester,England Status: Offline Points: 1544 |
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I'm trying to rationalise what I and a few others on this thread believe we hear, which seems to be at odds with the actual science. I have no qualifications or knowledge in this area but I always try to apply my own form of 'logic'... quite possibly wide of the mark I accept.
It was mentioned somewhere earlier in this thread that leaving or extending the centre pin on an RCA phono plug would act as an aerial & that makes sense to me. So, maybe because the various ported sockets on our equipment are by nature connected directly to the electronics, they act as a form of aerial in their own right and blocking the hole immediately in front does have some sort of effect. I compare this with the squeezebox 'mesh' circuit in my house (5 devices) & there are places where walls etc block the signal but a small adjustment resolves it, likewise with the router and a booster or phones and computers or twisting a digital/FM aerial slightly to receive a signal. Aren't some of these using the HF signals that we are talking about? Is it therefore possible that the casework has some blocking effect like this whereas an open socket immediately adjacent to the circuitry has less... or none?
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Older than I once was, younger than I'll be
............................. Andrew |
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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I don't know what equipment this is being tried with but assume it's not any of mine, and if such an improvement has been gained then the manufacturer would be in serious trouble if the product was submitted for EMC testing. In other words it must have been highly susceptible to GHz interference!
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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Ernie
Senior Member Joined: 23 Jan 2014 Location: Birmingham UK Status: Offline Points: 386 |
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You aren't sending signals between the nails in your floor boards and they aren't active components (apart from actively holding your floor boards in place) so the EMC directive doesn't apply. Basically boxes that commicate with each other need to be on the same ground plane.
Electromagnetic wave travel at roughly the speed of light 3 x10^8 m/s so you have to be right up in the GHz to get a wave length small enough to affect your gear entering the RCA sockets. There a vents in most casework that'll be more of a problem. |
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There are 10 kinds of people. Those who understand binary and those who don't.
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Drewan77
Senior Member Joined: 25 May 2013 Location: Chester,England Status: Offline Points: 1544 |
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Absolutely Jon, I modified/soldered up up the RCA caps today in addition to those XLRs so every unused socket is now plugged (outer ground only, no 'aerials')
Crikey.... music that I know intimately has definitely changed for the better & the natural cynic in me is trying hard to prove a placebo effect. I've been listening intently for several hours & so far I can't!
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Older than I once was, younger than I'll be
............................. Andrew |
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BAK
Senior Member Joined: 14 Mar 2010 Location: Kentucky, USA Status: Offline Points: 1744 |
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Agreed
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Bruce
AT-14SA, Pickering XV-15, Hana EL, Technics SL-1600MK2, Lautus, Majestic DAC, Technics SH-8055 spectrum analyzer, Eminence Beta8A custom cabs; Proprius & Reflex M or C, Enjoy Life your way! |
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Fatmangolf
Moderator Group Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8960 |
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What happened here whilst I was away? We're now listening in a Faraday cage I understand. Presumably I have to ground each nail in my floorboards or will the metal carpet be enough?
Lets be realistic and accept there will be a way for some EMI to get into our hifi cases, even if that's down the cables we plug in. Surely we can agree that capping off unused sockets is a little better than not doing so, can't we? |
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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