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!

128x128tommypenngotti

Showing 1 response by rauliruegas

Dear @tommypenngotti  :  As almos a " rule " any audio system needs to be grounded at only one place using a true system's dedicated  ground/earth conection. In my system that point is my phonolinepreamp.

If after that problem persist then one of the tube electronics power supply is out of specs .

 

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.