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  #1  
Old 01-13-2014, 10:14 PM
dirtbag dirtbag is offline
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Default My Thorens TD125MkII has the dreaded hum
I have a beautiful restored Thorens TD125MkII long base built by Artisan Fidelity with an Ortofon RS309D arm and Ortofon SPU. In the last few months it has developed a hum. A low frequency hum only audible when playing a record at mid to loud volume. When you lift the arm the hum stops. I have swapped cartridges so not a cartridge issue. It is most definitely a TT issue as I have even taken the table over to my brothers house to try in his system and the hum is still there.
Any Thorens experts out there with some ideas?
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  #2  
Old 01-13-2014, 10:15 PM
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Quote:
Originally Posted by dirtbag View Post
I have a beautiful restored Thorens TD125MkII long base built by Artisan Fidelity with an Ortofon RS309D arm and Ortofon SPU. In the last few months it has developed a hum. A low frequency hum only audible when playing a record at mid to loud volume. When you lift the arm the hum stops. I have swapped cartridges so not a cartridge issue. It is most definitely a TT issue as I have even taken the table over to my brothers house to try in his system and the hum is still there.
Any Thorens experts out there with some ideas?
How is this table grounded to your phono pre?
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Analog Rig: CLEARAUDIO INNOVATION WOOD, UNIVERSAL ARM w/ Da VINCI' CART, 2nd UNIVERSAL ARM w/ GOLDFINGER STATEMENT CART, HRS-MXR REFERENCE RACK-GLOSS BLACK w/ M3X SHELVES, AESTHETIX RHEA SIG PHONO-PRE, BRYSTON BHA-1 HEADPHONE AMP, WW PLATINUM CABLES
Reference System: BURMESTER 911MK3 AMP(3), 088 PRE-AMP, 089 CD PLAYER, 100 PHONO PRE-AMP, 948 POWER CONDITIONER, ACCUPHASE DG-68 VOICING EQUALIZER, AVID ACUTUS REFERENCE SP TT, GRAHAM PHANTOM II SUPREME ARM, BENZ MICRO LP-S CART, GRANDIOSO P1X/D1X STACK, G1X RUBIDIUM MASTER CLOCK, N05 NETWORK PLAYER, SILENZIO MUSIC SERVER, HRS-SXR CUSTOM RACK w/ M3X SHELVES, SONUS FABER AIDA SPEAKERS, JL FATHOM F113v2 SUBS(2) SOUND ANCHOR STANDS(2) WW PLATINUM CABLES
Library System: GRANDIOSO M1 MONOBLOCK AMPS, C1 LINESTAGE PRE-AMP, K1X CD/SACD PLAYER, G1 MASTER RUBIDIUM CLOCK, E02 PHONO-PRE, SILENZIO MUSIC SERVER, AERIAL ACOUSTICS 20T V2, AERIAL SW12 SUBS(2), CANTON REF K1’s, VPI HRX TT w/ SDS POWER SUPPLY, ORTOFON CADENZA BLACK CART, KLAUDIO RCM, SHUNYATA DENALI 6000/S v2, SHUNYATA OMEGA QR’s, WW PLATINUM CABLES
Esoteric/Bryston System: ESOTERIC C02-X PRE-AMP, P-02X TRANSPORT, D02-X DAC, G02-X CLOCK, BRYSTON 28B3 CUBED MONOBLOCK AMPS(4), BRYSTON BHA-1 HEADPHONE AMP, SHUNYATA DENALI 6000/S v2(2) EVEREST 8000 POWER CONDITIONER(2) ALTAIRA CG & SG HUBS, AMR-DP777-SE DAC, SILENZIO MUSIC SERVER, TAD REFERENCE ONE MK2 LOUDSPEAKERS, QUADRASPIRE RACK, WW PLATINUM CABLES
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  #3  
Old 01-13-2014, 10:56 PM
dirtbag dirtbag is offline
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Ivan, It uses the standard phono cable ground wire to the Shindo ground lug.
The frustration is I have had this table for over 3 yrs and this hum has just developed in the last few months. I've tried a humbuster cheater plug, no help.
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  #4  
Old 01-13-2014, 11:01 PM
NOLG4EVR NOLG4EVR is offline
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Quote:
Originally Posted by dirtbag View Post
I have a beautiful restored Thorens TD125MkII long base built by Artisan Fidelity with an Ortofon RS309D arm and Ortofon SPU. In the last few months it has developed a hum. A low frequency hum only audible when playing a record at mid to loud volume. When you lift the arm the hum stops. I have swapped cartridges so not a cartridge issue. It is most definitely a TT issue as I have even taken the table over to my brothers house to try in his system and the hum is still there. Any Thorens experts out there with some ideas?
Have you contacted Artisan about the problem? I have never heard one of his tables but they sure are pretty. Hopefully you will get this sorted out soon.
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  #5  
Old 01-13-2014, 11:07 PM
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Sounds to me like a cap is leaking; I wonder what electronics are inside the Thorens.
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MX136, MC1.2KW(10) MC2KW(2), MCD1100, MS750(2) MVP881, C1000C/P/T, MPC1500, HT-2 SUBS(2) HT3F(2) WS350(2) XRT2K, XCS2K, XR27(2) XCS350(2) JL GOTHAM v2 SUBS(2) SILENZIO MUSIC SERVER, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" MOTORIZED SCREEN, CINEMA-TECH SEATING, WW PLATINUM CABLES
Reference System: ACCUPHASE A300 AMPS, C3900 PRE-AMP, DP1000 CD/SACD TRANSPORT, DC1000 DIGITAL PROCESSOR, DG-68 DIGITAL EQUALIZER, T1200 FM STEREO TUNER, PS1230 POWER SUPPLY, HRS-SXR CUSTOM RACK w/ M3X SHELVES, TAD REFERENCE ONE MK2 LOUDSPEAKERS, WW PLATINUM CABLES
CAPE COD
MX150, MC501(2) MC1.2KW(10) MC2301(2) MR88, MVP881, MCD1100, MDA1000, C1000C/P/T, MPC1500, ESOTERIC K-01X 30th ANNIVERSARY (BLACK) SACD/CD PLAYER, G02-X CLOCK, HT3F(2) XRT2K, XCS2K, XR27(2) JL GOTHAM v2 SUBS(2) JL FATHOM F113v2 SUBS(4) SOUND ANCHOR STANDS(2) KALEIDESCAPE STRATO & TERRA SERVERS 80-TB, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" SCREEN, SONUS FABER STRADIVARI, SILENZIO MUSIC SERVER, FORTRESS SEATING, WW PLATINUM CABLES
Analog Rig: CLEARAUDIO INNOVATION WOOD, UNIVERSAL ARM w/ Da VINCI' CART, 2nd UNIVERSAL ARM w/ GOLDFINGER STATEMENT CART, HRS-MXR REFERENCE RACK-GLOSS BLACK w/ M3X SHELVES, AESTHETIX RHEA SIG PHONO-PRE, BRYSTON BHA-1 HEADPHONE AMP, WW PLATINUM CABLES
Reference System: BURMESTER 911MK3 AMP(3), 088 PRE-AMP, 089 CD PLAYER, 100 PHONO PRE-AMP, 948 POWER CONDITIONER, ACCUPHASE DG-68 VOICING EQUALIZER, AVID ACUTUS REFERENCE SP TT, GRAHAM PHANTOM II SUPREME ARM, BENZ MICRO LP-S CART, GRANDIOSO P1X/D1X STACK, G1X RUBIDIUM MASTER CLOCK, N05 NETWORK PLAYER, SILENZIO MUSIC SERVER, HRS-SXR CUSTOM RACK w/ M3X SHELVES, SONUS FABER AIDA SPEAKERS, JL FATHOM F113v2 SUBS(2) SOUND ANCHOR STANDS(2) WW PLATINUM CABLES
Library System: GRANDIOSO M1 MONOBLOCK AMPS, C1 LINESTAGE PRE-AMP, K1X CD/SACD PLAYER, G1 MASTER RUBIDIUM CLOCK, E02 PHONO-PRE, SILENZIO MUSIC SERVER, AERIAL ACOUSTICS 20T V2, AERIAL SW12 SUBS(2), CANTON REF K1’s, VPI HRX TT w/ SDS POWER SUPPLY, ORTOFON CADENZA BLACK CART, KLAUDIO RCM, SHUNYATA DENALI 6000/S v2, SHUNYATA OMEGA QR’s, WW PLATINUM CABLES
Esoteric/Bryston System: ESOTERIC C02-X PRE-AMP, P-02X TRANSPORT, D02-X DAC, G02-X CLOCK, BRYSTON 28B3 CUBED MONOBLOCK AMPS(4), BRYSTON BHA-1 HEADPHONE AMP, SHUNYATA DENALI 6000/S v2(2) EVEREST 8000 POWER CONDITIONER(2) ALTAIRA CG & SG HUBS, AMR-DP777-SE DAC, SILENZIO MUSIC SERVER, TAD REFERENCE ONE MK2 LOUDSPEAKERS, QUADRASPIRE RACK, WW PLATINUM CABLES
Accuphase/Canton System: ACCUPHASE E800 INTEGRATED, DP570 CD/SACD PLAYER, T1200 FM STEREO TUNER, DG-68 VOICING EQUALIZER, PS530 POWER SUPPLY, CANTON REF K3’s, CANTON REF K5’s, SILENZIO MUSIC SERVER, HRS MXR REFERENCE MAHOGHANY RACK w/ M3X2 SHELVES, WW GOLD CABLES
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Old 01-13-2014, 11:32 PM
dirtbag dirtbag is offline
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Have you contacted Artisan about the problem? I have never heard one of his tables but they sure are pretty. Hopefully you will get this sorted out soon.
I have a call into him now, haven't heard back yet. It is a beautiful table. Being a woodworker by trade there are a few things I would do differently but it sounds fantastic, full, rich, solid sound.
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Old 01-13-2014, 11:35 PM
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Sounds to me like a cap is leaking; I wonder what electronics are inside the Thorens.
Thanks Ivan, we can always count on you for knowledgable advice.
I just took the bottom cover off and I did notice that there is no ground wire connection to the IEC connector. I wish I knew more about this type of stuff.
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Old 01-14-2014, 09:37 AM
Bernard Bernard is offline
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Quote:
Originally Posted by dirtbag View Post
I have a beautiful restored Thorens TD125MkII long base built by Artisan Fidelity with an Ortofon RS309D arm and Ortofon SPU. In the last few months it has developed a hum. A low frequency hum only audible when playing a record at mid to loud volume. When you lift the arm the hum stops. I have swapped cartridges so not a cartridge issue. It is most definitely a TT issue as I have even taken the table over to my brothers house to try in his system and the hum is still there.
Any Thorens experts out there with some ideas?
The hum stopping when you lift the arm indicates that the arm is being grounded through your body. I suspect that the ground wire is broken within the arm. I suggest that you connect a piece of wire to the Shindo ground lug and touch the other end to any metallic point on the arm, ensuring that you do not touch the arm with your hand. If that stops the hum, it confirms my suspicion.
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Old 01-14-2014, 09:42 AM
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I agree with Bernard - possible broken ground in arm.
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  #10  
Old 01-14-2014, 10:31 AM
dirtbag dirtbag is offline
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The hum stopping when you lift the arm indicates that the arm is being grounded through your body. I suspect that the ground wire is broken within the arm. I suggest that you connect a piece of wire to the Shindo ground lug and touch the other end to any metallic point on the arm, ensuring that you do not touch the arm with your hand. If that stops the hum, it confirms my suspicion.
That will be very easy to try. Thank you for the suggestion Bernard.
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