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General Audio Discussion All other Audio Q & A |
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#21
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components. |
#22
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components. Last edited by Puma Cat; 07-12-2019 at 02:15 PM. |
#23
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#24
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This one had me scratching my head. There was an extremely hot spot of EMF Radiation activity... Left side of the upper shelf of the rack. Background radiation registered at "45" across the room and away from anything electric/electronic. The "hot spot" measured "245" and registered "high".
The "hot spot" on top of the rack was very puzzling. My Luxman unit sits up there. I disconnected and moved the power cord and the Luxman is not powered but the hot spot persists. Upon further careful sweeping, I noticed it is actually coming from the wall behind the rack. That one had me scratching my head but then I realized that is the exterior wall on the side of the house where the "smart" gas and water meters are as well as their RF modules that they use to collect the data! Holy smokes those things are NOISY for whatever reason! The hot spot is only approximately 9"x12" inches right above my rack. Potential Solution. Will hang a sheet of EMF/RFI blocker behind the rack or relocate the rack to a more "quieter" place along the wall. |
#25
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components. |
#26
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Good thread Serge. I have loaded the APP on my phone but really have to ask how my phone can be turned into an RMF detector via software?
The theater I am sitting in registers at 36 but when I move my phone close to the top of my wife’s iPhone, my phone register as high as 600-700 microteslas and the app shows HIGH. The cottage we are staying at registered 46 but next the fridge, I measured 350 microteslas. The app does seem to work. Does anybody know how??
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Main Equipment: Kharma Elegance dB11-S, JL Audio F113v2 X 2, Block Audio Line & Mono SE Amplification, Bricasti M21 DAC, Antipodes Kala K-50 Server Power: Shunyata Everest 8000, Sigma XC v2, Sigma NR v2, Block Audio PCs, Defender, ADDPowr Wizard Grounding: Shunyata Altaira CGS - 4 X Alpha CGS cables, Network : Supra Cat 8+, Twin (Nenon) Modified Buffalo GS2016 Switches, Keces P3 LPSU, Cables: Wireworld Platinum 8 USB, Wireworld Platinum Eclipse 8 Speaker cables, 6M & 1M Tubulus Concentus ICs, Other: Multiple GIK products, Stillpoint Apertures, Stillpoint Minis and Ultra SS, Three 20 Amp lines, Furutech GTX - Gold outlets, Adona Rack |
#27
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The magnetometer in the iPhone is an amazing instrument that gives you the magnetic field strength along three axis in micro-teslas (µT). Apple software uses this instrument to find the direction the iPhone is pointed in, but you can also use the magnetometer to measure the strength of magnetic fields. |
#28
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By the way, majority of EMF apps are used by people to detect "ghosts"... But I think we will leave that for another thread.
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#29
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Just expanding on the issue of common mode noise. This is a major source of "pollution" in this time of connected devices, e.g. smart phones and tablets, connected appliances e.g. doorbell, kitchen and household appliances.
Folks think that copper Ethernet cables can't impact sound quality because of the specifications for (copper) Ethernet: that everything is "bit perfect" and if a packet is dropped in transmission it gets re-sent, so what's the problem? Well, there's a whole host of problems. Copper Ethernet is actually pretty "dirty" with respect to susceptibility to noise factors. For IT applications, this is not a problem, as the output is "discrete"; either the pixel gets printed in a print-out, or displayed on a computer monitor or it doesn't. And with Ethernet "error correction", it almost always does....so, no worries. But streaming musical content is NOT discrete; its "continuous data", and...the timing is, in the words of Hans Beekhuzen, "hyper-critical" (this is why folks use those ultra-trick clocks for DACs, etc., for example). Also, Ethernet cables, like many copper cable specifications, are susceptible to the usual noise factors, e.g. lack of galvanic isolation, EMI/RFI, etc. They are also susceptible to low-impedance and high-impedance AC leakage currents, which are usually caused by crap switch-mode power supplies and can be made worse by...shielded Ethernet cables where the shield is connected to the RJ45 connectors at both ends. These noise factors contribute to digital audio quality, adding "digital glare", jitter and...clock phase noise. And then there's the common mode noise, as well. The Shunyata Alpha and Sigma Ethernet cables are the only ones I am aware of that have an effective common mode noise (CN) filter, and the function of this filter is very clearly discernable. The Alpha brings a notably lower noise floor and cleaner, more "open", spacious and airy and extended over the excellent attributes of Venom. And Sigma, with two CN filters, builds further upon that; the addition of the 2nd CN filter brings increased presentation of subtle details, textures, articulation, and breath and phrasing in vocals and an even lower noise floor. I'm literally hearing content on well-known songs that I simply have not heard before. All this adds up to a musical presentation is much more "analog", open, airy, spacious, dimensional in character. But, one has to open to trying these cables to understand...
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components. Last edited by Puma Cat; 07-12-2019 at 03:18 PM. |
#30
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The reason I brought up the "ghosts" is that the "hot spot" over my rack is also where I notice the persistent "orb" on my security camera down in the basement when the lights are off. ... It is always there but I have no explanation for it. As long as it is a friendly orb ghost, I'm ok with sharing my basement with it.
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