Hi Zd542, I have set the RCM to its MM configuration (47kohm, 55db).
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 ?