2. analog
  3. 1432064502

SUT Hum

I bought a Hashimoto HM3 SUT.
It has a ground connection, but when the ground cable from the turntable is connected to the SUT, there is an audible hum. However, when the ground cable is connected to the ground connection of the preamp, there is no hum.

Is it a common problem? I'm OK as long as the SUT does not generate hums. But I wonder whether it is due to faults in the SUT.
128x128ihcho

Showing 2 responses by ihcho

ihcho's avatar
ihcho OP
609 posts
 
Good to know that there is nothing wrong with the SUT.
Thanks.
ihcho's avatar
ihcho OP
609 posts
 
Thanks for all response.
I connected the ground cable from the turntable to SUT and a wire from the SUT to the phono preamp.
Then, most of the hums were gone. The level of hum was further reduced compared to the ground cable connected to the phono preamp or the preamp.

Is it normal?
Previously I had a cinemag SUT and I only connected the ground cable from the turntable to the SUT, and the hum level was very low.
More to discover