Eric Chan Kah Chun Posted August 21, 2020 Posted August 21, 2020 Hi Guys, I couldn't find any solution to my problem so I thought maybe I post here to see if anyone have experience on this. My turntable setup just have hums that don't go away no matter what I do. It just come out recently like 2 weeks ago. The setup has been in the current position for about a year without any hums. My TT setup itself is about 10 years old. My setup consists of the following Project 2.9 wood TT with Denon DL103r Clearaudio Basic Phono Graham Slee Elevator EXP Conrad Johnson PFR Preamp Manley DIY 75/75 Tube Poweramp Cables: Mogami 2549 IC between TT to Elevator and Elevator to Basic Phono, along with grounding cable in between each devices Furukawa Silver IC between Basic Phono and Pre Klotz signature IC between Pre and power. Have tried changing the interconnects (the mogamis are new), problem still there. Have tried changing the grounding cable, problem still there. Have tried moving the phono and elevator further away from the power strips, problem still there. Have tried changing my previous SUT to the current Elevator, problem still there. The hum is a low sounding hum that is quite loud after 9 o'clock. All my other input devices to the pre has no issues. It just come suddenly and refuse to go away! lol. Any suggestion is appreciated. I'm thinking of maybe upgrading the powersupply to TT and also maybe change the cartridge. Best Regards Eric
Eric Teh Posted August 21, 2020 Posted August 21, 2020 Hi Guys, I couldn't find any solution to my problem so I thought maybe I post here to see if anyone have experience on this. My turntable setup just have hums that don't go away no matter what I do. It just come out recently like 2 weeks ago. The setup has been in the current position for about a year without any hums. My TT setup itself is about 10 years old. My setup consists of the following Project 2.9 wood TT with Denon DL103r Clearaudio Basic Phono Graham Slee Elevator EXP Conrad Johnson PFR Preamp Manley DIY 75/75 Tube Poweramp Cables: Mogami 2549 IC between TT to Elevator and Elevator to Basic Phono, along with grounding cable in between each devices Furukawa Silver IC between Basic Phono and Pre Klotz signature IC between Pre and power. Have tried changing the interconnects (the mogamis are new), problem still there. Have tried changing the grounding cable, problem still there. Have tried moving the phono and elevator further away from the power strips, problem still there. Have tried changing my previous SUT to the current Elevator, problem still there. The hum is a low sounding hum that is quite loud after 9 o'clock. All my other input devices to the pre has no issues. It just come suddenly and refuse to go away! lol. Any suggestion is appreciated. I'm thinking of maybe upgrading the powersupply to TT and also maybe change the cartridge. Best Regards Eric Hi Eric, try disconnecting the TT from the Elevator (including the grounding cable). If the hum is still there, at least you know it's not the TT. You can then work further down the line to eliminate the suspects.
Eric Chan Kah Chun Posted August 21, 2020 Author Posted August 21, 2020 Hi cayinist, Thanks for the reply. I just tried removing the TT connection. Interesting is, the hum is still there at original Elevator position, it's on top of the power isolator. Once, I move the Elevator away from the isolator, the hum is gone (still have some hissing song). At this away position, I plug back the TT, the hum is back again. Seems like the hum is coming from 2 source, the positioning and also from the TT.
Guest Posted August 21, 2020 Posted August 21, 2020 Try repositioning the Graham Slee and Phono stage away from the amps and see (or hear) if it helps. I had the same problem with my setup, and I found that my sensitive tube phono stage was picking up hum when it was near my power amp.
Eric Chan Kah Chun Posted August 22, 2020 Author Posted August 22, 2020 Thanks silencer13 for the replu. I have tried reposition the phono stage and elevator away. The hum is still there. But when i pluck out the TT connection the hum is gone. In this case, this hum is cause by the cartridge?
macrotrust Posted August 22, 2020 Posted August 22, 2020 try this very useful https://www.parts-express.com/jensen-iso-max-ci-2rr-rca-stereo-line-input-isolator-hum-eliminator--246-0116
sail1624705977 Posted August 22, 2020 Posted August 22, 2020 Your TT is acting as a receiver picking up noise from any of your power supply (usually power amp), try using your preamp ground connect it to a cable and touch various parts of the TT, tonearm or chassis (do not go for live cables :P), check if hum gets softer. I have the same issue some time back, once I connected a wire from my TT motor to my preamp chassis hum went away.
Guest Posted August 22, 2020 Posted August 22, 2020 Thanks silencer13 for the replu. I have tried reposition the phono stage and elevator away. The hum is still there. But when i pluck out the TT connection the hum is gone. In this case, this hum is cause by the cartridge? Very easy to to identify. Just disconnect the cart from the phono stage and see if there's still hum. If there is, then it's phono stage. If no, the it's cart. And like sail said, try grounding various parts and see if that works.
malsound Posted August 22, 2020 Posted August 22, 2020 My setup consists of the following Project 2.9 wood TT with Denon DL103r Clearaudio Basic Phono Graham Slee Elevator EXP Conrad Johnson PFR Preamp Manley DIY 75/75 Tube Poweramp I can't help but notice you list the Graham Slee Elevator EXP after Clearaudio Basic Phono, shouldn't it be the other way around. Assuming you get it right try daisy chain a couple of chassis ground wire from elevator to Clearaudio Basic Phono follow by ground wire to preamp chassis. TT ground cable to elevator but some time depending on system, it work better direct to phono.
Eric Chan Kah Chun Posted August 23, 2020 Author Posted August 23, 2020 Yup the elevator comes before the phono. I have tried connecting the grounding cable to the phono, to the preamp, hum still there. I try disconnecting the cables to the cartridge, hum is gone... Sent from my iPhone using Tapatalk
malsound Posted August 23, 2020 Posted August 23, 2020 Yup the elevator comes before the phono. I have tried connecting the grounding cable to the phono, to the preamp, hum still there. I try disconnecting the cables to the cartridge, hum is gone... Sent from my iPhone using Tapatalk Try one thing attech your TT to your phono stage as if you are using a MM cartridge ( bypass the elevator all together.) and bring volume up . This will help you to narrow whether problem is at the TT end or the elevator itself.
Eric Chan Kah Chun Posted August 24, 2020 Author Posted August 24, 2020 Try one thing attech your TT to your phono stage as if you are using a MM cartridge ( bypass the elevator all together.) and bring volume up . This will help you to narrow whether problem is at the TT end or the elevator itself. Yup i have tried that as well. The hum is still there. I think the hum is on the turntable. So in this case should most likely be the cart. But can the tonearm cable also exhibit hum as well?
Joseph Lazaroo Posted August 24, 2020 Posted August 24, 2020 Hi Guys, I couldn't find any solution to my problem so I thought maybe I post here to see if anyone have experience on this. My turntable setup just have hums that don't go away no matter what I do. It just come out recently like 2 weeks ago. The setup has been in the current position for about a year without any hums. My TT setup itself is about 10 years old. My setup consists of the following Project 2.9 wood TT with Denon DL103r Clearaudio Basic Phono Graham Slee Elevator EXP Conrad Johnson PFR Preamp Manley DIY 75/75 Tube Poweramp Cables: Mogami 2549 IC between TT to Elevator and Elevator to Basic Phono, along with grounding cable in between each devices Furukawa Silver IC between Basic Phono and Pre Klotz signature IC between Pre and power. Have tried changing the interconnects (the mogamis are new), problem still there. Have tried changing the grounding cable, problem still there. Have tried moving the phono and elevator further away from the power strips, problem still there. Have tried changing my previous SUT to the current Elevator, problem still there. The hum is a low sounding hum that is quite loud after 9 o'clock. All my other input devices to the pre has no issues. It just come suddenly and refuse to go away! lol. Any suggestion is appreciated. I'm thinking of maybe upgrading the powersupply to TT and also maybe change the cartridge. Best Regards Eric For a fee I could come over to rectify your problem on hum. Setup and tune all turntables. Contact: 97721508.
Eric Chan Kah Chun Posted August 26, 2020 Author Posted August 26, 2020 Found the issue. Took out my old cartridge and swap with Denon and the hum is gone! Oh well it’s time to hunt for a new cartridge. Would the Hana SL be overkill or Nagaoka MP200 is good enough?? Also anybody knows who where can I find someone to change the internal tone arm cables? These seems so flimsy. I resolder 2 connectors which break while I pulled out of the Denon cart. Sent from my iPhone using Tapatalk
Joseph Lazaroo Posted August 28, 2020 Posted August 28, 2020 Found the issue. Took out my old cartridge and swap with Denon and the hum is gone! Oh well it’s time to hunt for a new cartridge. Would the Hana SL be overkill or Nagaoka MP200 is good enough?? Also anybody knows who where can I find someone to change the internal tone arm cables? These seems so flimsy. I resolder 2 connectors which break while I pulled out of the Denon cart. Sent from my iPhone using Tapatalk As mentioned for a Fee could fix your problem. As for cartridge any of the Hana models are good depending on how much you want to spend.
Eric Chan Kah Chun Posted September 7, 2020 Author Posted September 7, 2020 Just wanna thanks everyone for helping and especially thanks to jtsamarinda for his great skills and knowledge for not just solving my problem but also coach me in understanding the world of better vinyl and hifi sound. Very friendly and humble guy! Thanks so much! I'm now enjoying the refinement, soundstage, smoothness and beautiful sound from my upgraded Cardas wired Project tonearm with Hana SL cartridge.
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