Maybe there's nothing wrong with any of it. Have you tried different settings on your RCM? (I know I probably don't have to ask that question given how nice your gear is, but its the first thing that comes to mind.)
Why my SUT hums only with certain phonostages ?
Hi,
I use a vintage Ortofon STM-72 SUT with my Lyra cartridge. Curiously, when I connect it via my solid state RCM Sensor prelude phonostage, there is a strong hum. The hum lowers when I connect the earth lead of the phono cable to the phonostage earthing point, but still there is a hum which is distracting. However when I connect the SUT to my Shindo Aurieges MM phono stage there is absolutely no hum. I dont even have to connect the earth lead. What is the reason ? Is it my SUT or my phonostage ?
I use a vintage Ortofon STM-72 SUT with my Lyra cartridge. Curiously, when I connect it via my solid state RCM Sensor prelude phonostage, there is a strong hum. The hum lowers when I connect the earth lead of the phono cable to the phonostage earthing point, but still there is a hum which is distracting. However when I connect the SUT to my Shindo Aurieges MM phono stage there is absolutely no hum. I dont even have to connect the earth lead. What is the reason ? Is it my SUT or my phonostage ?
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