Hum in the phono system

Hum in the phono system

Postby poloman58 » Mon Mar 05, 2018 2:40 pm

When I play a CD it's dead quiet. when I play a record there is a bad hum the ground wire is connected. when I touch the lemo connector the hum goes away. sometimes its a loud hum sometimes low but always there. some said connect a second ground wire. Any suggestions? :|
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Re: Hum in the phono system

Postby spinblackcircle » Mon Mar 05, 2018 3:50 pm

poloman58 wrote:When I play a CD it's dead quiet. when I play a record there is a bad hum the ground wire is connected. when I touch the lemo connector the hum goes away. sometimes its a loud hum sometimes low but always there. some said connect a second ground wire. Any suggestions? :|


Here is good place to start.
http://wallofsound.ca/audioreviews/analog/troubleshooting-phono-amplifier-sut-noise/

Also, tons of forum posts regarding hum if you search.
VPI Prime/Grado Reference Master, VPI 16.5 RCM, Audio Research LP1, Audio Research VSI60, Martin Logan Electromotion ESL, ClearDay and Audio Sensibility Cables
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