Everything connected to the same outlet?
Turntable Hum
Any help appreciated!
Low pitched hum coming from TT input ...even when TT is not running . Hum is noticeable at about 1/4 volume & really bad at 50%
Manley Monoblock Snappers
VPI Scout w Hana MC cart right next to amp on table (moved TT away from amp to floor made 0 difference)
Allnic 1202 Phonostage grounded to VPI TT (on floor below JBL speakers & main speakers right to the left Tekton Encores)
Manley Jumbo Shrimp Preamp
Klark Teknik 32 band EQ
All cables (interconnects) recently replaced - Mogami
I tried ground lifting the TT motor - no change
unplugged tv & nearby laptop - no change
unplugged all lights nearby - no change
I suppose my next troubleshooting venture is to run a ground from phonostage to everywhere & start touching things? Phonostage seems to be the culprit....
😕
Thanks everyone!
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- 37 posts total
@danmar123 I’ll check the headshell wire...thanks @millercarbon Unfortunately everything is conected to the same outlet / 2 power strips |
@tommypenngotti Same outlet is fine. |
Try disconnecting things one at a time. Grounds can be funny. Normally you want to connect the turntable ground to the phono stage. But I went to a new arm where it was the other way around, going silent only with the ground disconnected. First I guess start with disconnecting phono stage from preamp. Then work your way back. Connect phono stage only- turntable disconnected from phono stage, phono stage not even plugged in. Then plug in phono stage. Then turn it on. One baby step at a time. Then connect turntable ground. Then R channel. Then L. I doubt it is internal arm wiring but if there is no hum until you connect a phono lead then it could be. But check the individual cartridge connections first. I doubt it will go that far. This is just to give you an idea how to track it down. |
- 37 posts total