How do I ground my turntable with my Pas2 pre since it doesn't have any place identified for it? I tried one of the screws on the I/O board but still got a lot of hum. Hmmm...
Merry Christmas!
Merry Christmas!
5 posters
PAS2 turntable grounding?
Drugolf- Posts : 29
Join date : 2014-12-29
peterh- Posts : 1833
Join date : 2012-12-25
Location : gothenburg, sweden
Ground the chassies in all your things ( at least tie them together, don't forget the record player) and then have at least one of them connected to ground in the outlet.
The phono cable is sensitive ( more or less depending on brand of cable) for both electric and
magnetic fields, route it as far from other power cables as possible. Don't collect excess cable in
a roll.
The phono cable is sensitive ( more or less depending on brand of cable) for both electric and
magnetic fields, route it as far from other power cables as possible. Don't collect excess cable in
a roll.
GP49- Posts : 792
Join date : 2009-04-30
Location : East of the sun and west of the moon
Minor clarification. If any of your gear has a three prong plug, and it is plugged into the AC outlet ground, a separate ground wire to the third outlet pin or the screw in the outlet plate will cause a ground loop. This is more critical in a phono system than in one with only line level sources but is worth remembering.
Drugolf- Posts : 29
Join date : 2014-12-29
This is a mostly vintage system. Pas2 pre, Dynaco ST70 amp wharfedale speakers. none of which have the ground prong of course. They are plugged into an APC surge protection bar. I also have a DAC connected to the aux input that is connected to a computer via USB. Turntable is Technics with the original power cord and RCA cord/jacks. None have the 3rd prong. The only thing that does is the APC power cord. The hum is only when the Pre is set to Phono.
j beede- Posts : 473
Join date : 2011-02-07
Location : California
Do you hear hum with phono selected but with the actual phono inputs shorted? Do you happen to be using a Grado pickup?
anbitet66- Posts : 143
Join date : 2009-12-23
Location : Valley Stream, NY
Drugolf,
If your Technics turntable has a separate ground wire, attach it to one of the chassis screws on your pas2. If that write is not attached there will be a lot of humming. It is attached to the tone arm separate from the RCA plug ground. Tony
If your Technics turntable has a separate ground wire, attach it to one of the chassis screws on your pas2. If that write is not attached there will be a lot of humming. It is attached to the tone arm separate from the RCA plug ground. Tony
Drugolf- Posts : 29
Join date : 2014-12-29
Yes, the TT has the separate grounding wire. I did attach it to one of the screws on the side (that secures the cover). Also one of the small screws on the I/O board. no improvement.
How do I short the RCA cables? Touch them together?
How do I short the RCA cables? Touch them together?