cement_head wrote:I have a Grado Prestige Gold II on my TD 50 MKII A/B and it sounds awesome - very nice with the table. On my second stylus! No hum. If you have hum, you may have an earthing problem.
tlscapital wrote:cement_head wrote:I have a Grado Prestige Gold II on my TD 50 MKII A/B and it sounds awesome - very nice with the table. On my second stylus! No hum. If you have hum, you may have an earthing problem.
I don't know the Grado cartridges per say, but I would doubt that a good cartridge like that would induce such issues on it's own or through a bad or wrong build. I know the recurrent say I don't hear it so it doesn't exist meaning refusing to hear it. But here I want to second the ground or loop lead on the issue.
My Denon DL-102 MC cartridges is very magnetic and I did had hum at times through the evolution of my tweaks on my previously tweaked Thorens not by me. Mind that my phono set-up sound got "cleared" out and the hum became more noticeable through my tweaks improvements.
Firstly I understood that I have to have a a good dampening mat layer on the alloy platter to prevent my "magnetic" cartridge to challenge the gravity VTF ! Since I got rid of the original rubber thick Thorens mat I had to gradually replace it with my now perfectly fit for my use and efficiency with my "lasagna" mat !
Finally I did a dedicated tonearm wand ground. Previously the sub-chassis and chassis ground was linked to the tonearm ground. Likely the platter/cartridge magnetism induced that hum loop... Since those platter matt dampening and split dedicated grounds I have pure silent speakers. A joy !
tlscapital wrote:The Thorens TD318 has a 16 volts AC motor. So unlike the 110/220 volts one would it still generate so much EMF (electro-magnetic frequencies) to induce hum to an "unshielded" cartridge ? I don't know so I'm only asking.
andrewcroft2006 wrote:Hi everyone I hope you can help I have a Thorens td318 and am interested in Grado gold cartridge but am concerned about the problem of grado hum would this be a problem on this turntable thanks in advance for any help.
tlscapital wrote:humandrewcroft2006 wrote:Hi everyone I hope you can help I have a Thorens td318 and am interested in Grado gold cartridge but am concerned about the problem of grado hum would this be a problem on this turntable thanks in advance for any help.
So since you motor runs at 16 Volts and your external wall wart step down transformer can be placed far away from the turntable, any EMF from the AC motor should be minimalistic.
Inducing maybe only a little hum. If ever the hum is still too present, one can maybe apply a DIY lead (soft to cut, bend and shape and most efficient to block EMF) motor shield.
cafe latte wrote:Is the transformer not inside the plinth?
Kurt45 wrote:I have a Grado Signature Jr on my Thorens TD316 (manual version of the 318) and I don't have any problems with hum.
I have a Grado Blue on my Technics SL-7, and that does have a slight hum.
doctor fuse wrote:
Is the Signature a low-output? Do LOs not hum like the HOs (Hos that "hum"....hmmmm? )?
My XF-3 and 8MZ/Green hum only very slightly on my Technics. You are talking very minimal hum, aren't you?