I have a TNT 3.5 w/JMV 12.5 arm. SDS.
I have had problems in the past with loud hum on the phono stage. Here are some things to consider.Loud hum usually is a grounding problem.I am assuming you only experience the loud hum with the phono stage.If the A/B tests of different cables,amplifier,placement of SDS/motor, cartridges do not eliminate hum,you should replace tonearm wire. This wire is easily damaged at the time of installation. A faulty grounding of the tonearm wire produces one of the loudest hums. Hope your lucky enough to find the problem quickly, before it drives you crazy.
I have had problems in the past with loud hum on the phono stage. Here are some things to consider.Loud hum usually is a grounding problem.I am assuming you only experience the loud hum with the phono stage.If the A/B tests of different cables,amplifier,placement of SDS/motor, cartridges do not eliminate hum,you should replace tonearm wire. This wire is easily damaged at the time of installation. A faulty grounding of the tonearm wire produces one of the loudest hums. Hope your lucky enough to find the problem quickly, before it drives you crazy.