2. analog
  3. 173702-89448

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!

tommypenngotti

Showing 1 response by analoghaven

analoghaven
37 posts
 

Tommy, I've going through this for a number of years.

I also Have some RF starting at  9 o'clock, it's a head scratcher.

For me dedicated lines to the fuse box and high end outlets may do the trick. 

It seems like matching the phono pre and the cart is most crucial, I'm thinking of going to the DS system with phono pre and optical cartridge to get the correct match, I've heard good things.

Your thoughts

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