The stage 3 has an extra cable hanging out with spades on either end to connect to the ground post.
my DIY has two wires- center one is conductor and the return is helix..
my DIY has two wires- center one is conductor and the return is helix..
Hum with Ypsilon MC26L SUT that goes away with touching
I need help solving the hum problem.
Ikeda Kai cartridge -> Ypsilon MC26L SUT -> Ypsilon VPS 100 -> Cary SLP 05 -> Cary CAD 211FE monoblocks -> KEF Blade.
ICs between MC26L and VPS100 Stage 3 concepts RCA
ICs between VPS100 and Cary SLP 05 Stage 3 concepts XLR
Cary SLP 05 and Cary monoblocks Shunyata RCA
Cary monoblocks to KEF Blade Shunyata speaker cables.
Connected ground from tonearm phonocable to SUT grounding post ->I hear 60 hz hum
Connected ground from tonearm phonocable to SUT grounding post + connected SUT grounding post to VPS 100 ground ->I hear 60 hz hum (slightly decreased)
Connected ground from tonearm phonocable directly to VPS 100 ground (I read in the forums to try this) -> I hear 60 hz hum
If I touch the body of SUT (metal) with one hand and touch the metal frame of the rack that sits directly on the floor, the hum disappears in all the above situations.
I used two shorting RCA plugs into input loading of SUT with tonearm cable connected to input-> No Hum
I used two shorting RCA plugs into input of SUT without tonearm cable-> No Hum
I used two shorting RCA plugs into output loading of SUT -> No Hum
Any help in solving this hum problem is greatly appreciated.
Thanks
Kanchi
Ikeda Kai cartridge -> Ypsilon MC26L SUT -> Ypsilon VPS 100 -> Cary SLP 05 -> Cary CAD 211FE monoblocks -> KEF Blade.
ICs between MC26L and VPS100 Stage 3 concepts RCA
ICs between VPS100 and Cary SLP 05 Stage 3 concepts XLR
Cary SLP 05 and Cary monoblocks Shunyata RCA
Cary monoblocks to KEF Blade Shunyata speaker cables.
Connected ground from tonearm phonocable to SUT grounding post ->I hear 60 hz hum
Connected ground from tonearm phonocable to SUT grounding post + connected SUT grounding post to VPS 100 ground ->I hear 60 hz hum (slightly decreased)
Connected ground from tonearm phonocable directly to VPS 100 ground (I read in the forums to try this) -> I hear 60 hz hum
If I touch the body of SUT (metal) with one hand and touch the metal frame of the rack that sits directly on the floor, the hum disappears in all the above situations.
I used two shorting RCA plugs into input loading of SUT with tonearm cable connected to input-> No Hum
I used two shorting RCA plugs into input of SUT without tonearm cable-> No Hum
I used two shorting RCA plugs into output loading of SUT -> No Hum
Any help in solving this hum problem is greatly appreciated.
Thanks
Kanchi
Showing 9 responses by kanchi647
@lewm all my components are connected to Shunya V-ray which has 8 outlets. Yes, I am already grounding the tonearm to the SUT and the SUT to the phono stage. Is there a way to connect the ground from Phono stage to pre-amp and amps? Just touch the body of the amps? How do the wires stay in place? @stringreen I used a junk wire and connected the SUT and made contact with the metal rack. Hum did not go away. It only goes away when I place my palm on the metal rack and have good contact. How do I make good contact using the wire to the metal frame? I will get some wire from lowes tomorrow. @oldhvymec the contacts look clean. How do I clean the contacts? Is there a solution you recommend? Thanks for all the help |
@lewm my home made IC doesn’t have a sheild or ground conductor. Neither does the IC made by Ypsilon. The Stage 3 concepts IC has a ground conductor and I tried multiple configurations which had hum- including connecting only one side, both sides, none, directly connecting the ground of stage 3 to the TT phonocable and VPS100 and bypass SUT. |
Update: the hum disappeared after I replaced the Stage 3 concepts analord interconnect from SUT to Ypsilon VPS100 with Ypsilon interconnect. i also made my own IC using helix design from http://www.image99.net/blog/files/category-002a002a-the-helix-image-interconnect.html and the Hum disappeared. can anyone explain why the hum disappeared with just changing the IC? Thanks |