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Simple, unexpected fix for Grado hum

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Posted on January 2, 2021 at 10:14:46
LowRedMoon
Audiophile

Posts: 1091
Location: Central PA
Joined: February 28, 2006
 To the point: move the amp away from the turntable.

I know - it's an OLD topic, but it took me time to figure it out, so I'm posting to potentially same someone else time in the future.

My receiver's edge was 16" from the cartridge in resting position and there was an audible hum. I moved the receiver to 21" away and the hum is inaudible. The ZF3 cartridge sounds beautiful.

That was after trying everything else.

The receiver is a Sansui G-2000. The table is an Oracle Alexandria MkII, and there is no hum induced from the motor.

Adam

 

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RE: Simple, unexpected fix for Grado hum, posted on January 2, 2021 at 16:16:18
xsb7244
Audiophile

Posts: 428
Location: Hawaii
Joined: May 17, 2011
 Try also Hagerman Audio labs Humbucker.

 

RE: Simple, unexpected fix for Grado hum, posted on January 2, 2021 at 17:35:45
LowRedMoon
Audiophile

Posts: 1091
Location: Central PA
Joined: February 28, 2006
 Nice product.
Luckily, my Oracle has a DC motor. The hum was being induced by the receiver's power transformer.

Adam

 

RE: Simple, unexpected fix for Grado hum, posted on January 3, 2021 at 04:13:01
JonM
Audiophile

Posts: 292
Joined: December 29, 2000
 Interesting product - reminds me of the old VPI mu-metal bricks that were intended to "pull" magnetic fields away from amplifiers. (Interesting company - check out the list of articles on their web site, below.)

In the case of my LP12 and Grado, the hum stopped when I turned off the motor. The Grado is nice, but fortunately there are alternatives that don't hum.

 

RE: Simple, unexpected fix for Grado hum, posted on January 4, 2021 at 05:13:18
spindoctor
Audiophile

Posts: 1663
Location: Virginia
Joined: December 31, 2002
 I'm aware of this issue yet I've used Grado wood bodies in my Thorens TD321 with SUmiko MMT tonearm and has had no issues. I'm thankful because I enjoy the way that the Grado's reproduce the music. I listen primarily to classical and jazz.

 

RE: Simple, unexpected fix for Grado hum, posted on January 8, 2021 at 08:01:47
LowRedMoon
Audiophile

Posts: 1091
Location: Central PA
Joined: February 28, 2006
 Nice! I used a Grado Platinum years ago, and the midrange was spooky realistic. I imagine jazz sounds great with them.

Adam

 

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