#11
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Serge.......Yep. I was moving the balanced cables from the variable output, where I had been driving the MC501's direct. Got side tracked, came back, thought I was done, popped in a CD, and all hell broke loose. Thank God I took my blood pressure pill that morning. Happy to say Power Guard worked.
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Dan STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113 VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A |
#12
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The guy up the street on his ham radio is running a 2 kw linear amplifier and yagi beam pointed at your house
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#13
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I think the ground was a bit loose on my phono stage. I tightened it up and have not heard any more strange "broadcasts" through my speakers.
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#14
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Maybe they were illegal aliens!
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Sources: Vinyl: Clearaudio Innovation Wood turntable with 9" Universal tonearm, Da Vinci V2 cartridge, Stillpoints SS & Stillpoints clamp, McIntosh MVP 901, Apple Mac mini via Benchmark DAC 1, Aurender N100C via Schiit Yggdrasil Control: McIntosh C1100, Mcintosh MX151 Power: Mcintosh MC2301s (front), McIntosh MC501 (center), Mcintosh MC402 (rear) Speakers: Sonus Faber Amati Futura (front and back), SF Vox center Power/connections: PS Audio Power Port receptacles, RGPC 400 pro (2) WireWorld interconnects and speaker cable |
#15
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Quote:
I really need to invest some time in cable management, looks like a den of snakes. |
#16
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#17
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Quote:
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MX136, MC501s, MC402, MCD500 RtR 300Ds, JL Fathom F112, Mirage OM-C3, JBL 2600s Dual CS 606, Ortofon 2M Black Tandberg TD20A, Harmon Kardon HK 400xM PPP, Power Port, WW Ag Eclipse IC's & Speaker Cables, WW Ag Electra PC's |
#18
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Documenting my experience here in the event someone will benefit from it. A wise person once said (paraphrasing): Experience is a cruel teacher. It gives you the exam first and the lesson afterwards.
I had been battling a radio interference problem out of the left speaker (Dynaudio Contour 1.3SE) driven by Jeff Rowland Model 2 power amp and a Meridian MS 600 for a while, then a Meridian 818v2 Reference Audio Core DAC/preamp. When I say radio interference, I mean I could hear actual music and DJs talking from my listening position when I wasn't playing any music. If I held my ear up to the tweeter, I could sometimes make out what song was playing. I live close to a radio tower, so I mostly chalked it up to tough luck, but I did try all sorts of things. In-wall power filter, power conditioner, different pre-amp, etc. In another moment of desperation and particularly bad music playing that wasn't in my collection, I read the sensible advice to debug this problem, "starting from the back." So I pulled the XLR connectors of my Cardas Golden Cross balanced cable from the back of my power amp and plugged in XLR-RCA adapters that came with the Rowland. I turned on the power amp with speakers attached, no pre-amp. Silence. So far so good. Next, I ran a spare RCA interconnect cable from the preamp to the poweramp with RCA-XLR adapters. Silence again. Wait, this pedestrian Audioquest RCA interconnect is more silent than my fancy Cardas cable? It had never occurred to me that an interconnect could be the problem, but I borrowed some other XLR interconnects from my dealer (happened to be Analysis Plus). Silence. Plugged Cardas cable back in to make sure I wasn't nuts. Katy Perry. (don't pin me down on this, but something Pop-y). Tried one Cardas lead and one Analysis Plus lead. More unwanted radio noise. So, I submitted service request to Cardas to have the cables looked at and, if necessary, re-terminated. Cardas graciously re-terminated my cables free of charge (trust me, I've had this cable a long, long time) and I now have a dead silent setup once again. Very impressed with Cardas here. TL;DR: Loose solder picking up radio signal like a filling in a molar? Something with ground floating or not floating? I don't know, and I'm not an EE. But in my case there was something about my balanced interconnect that caused radio interference to be audible on my rig. Work your way backwards and don't rule anything out. For what it's worth, Soundserge |
#19
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Since muting the phono stage eliminates the problem, the fault is due in inadequate shielding. Placing the Bellari inside a Faraday cage should solve it.
http://en.wikipedia.org/wiki/Faraday_cage The reception or transmission of radio waves, a form of electromagnetic radiation, to or from an antenna within a Faraday cage is heavily attenuated or blocked by the cage. |
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