|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
158.85.76.228
I've been DIY'ing my own MC step-ups for a while and there's a common suggestion to tie the "-" side of the RCA input/output jacks to chassis ground post to reduce hum. (This works more often than not in my experience)
Just wondering what the reasoning for this... wouldn't this be shorting one side of the pseudo-balanced signal (and losing the common-mode noise rejection inherent to the conductor arrangement)?
On a related note: I use Rega turntables and the turntable ground is tied to the left channel "-" conductor. This is a better way to wire MC step-ups to handle this?
Follow Ups:
To get proper common-mode noise rejection you need to use 2 conductor shielded wire for each channel from the tonearm to the step up transformers and float the (-).
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
This leaves the cartridge and primary free to float to some unknown DC voltage. A 1MEG resistor from primary to ground would take care of that.
"This leaves the cartridge and primary free to float to some unknown DC voltage."
What would cause there to be DC? The cartridge only generates AC from the motion of the cantilever.
BTW, microphones in recording studios are connected the way I show.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: