Pro-Ject Phono Box MM question

the thin end of the wedge
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Njk570
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Pro-Ject Phono Box MM question

Post by Njk570 » 12 Nov 2019 23:13

The silver screw on the backside that says ground...Do I need to hook up a ground wire too it? Im getting a slight humming sound so im wondering if that has anything to do with it.

Bluesnote
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Re: Pro-Ject Phono Box MM question

Post by Bluesnote » 13 Nov 2019 01:04

Yes, connect ground from turntable to your pre-amp . . .

Chris

Njk570
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Re: Pro-Ject Phono Box MM question

Post by Njk570 » 14 Nov 2019 02:57

The turntable doesn't have a ground I don't think. It's a Rega Planar 2

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Re: Pro-Ject Phono Box MM question

Post by Bluesnote » 14 Nov 2019 03:12

Njk570 wrote:
14 Nov 2019 02:57
The turntable doesn't have a ground I don't think. It's a Rega Planar 2


Hmmm (no pun intended) I'm not familiar with the Rega Planar but a google agrees with you - no ground from TT (grounds through RCAs?).

Seems it's a common problem with your TT and I didn't see a conclusive fix. . .

Hope others here can offer a solution.

Chris

vanakaru
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Re: Pro-Ject Phono Box MM question

Post by vanakaru » 14 Nov 2019 09:19

You can try to connect R channel RCA sleeve(LG) to the screw with piece of wire and hear if it makes any difference. Or take the wire from the screw and touch different metal parts of your TT. Or rearrange power cords around and try to find difference. These are just the easy things I would try first.
It is possible that you can/have to change the wiring inside the TT. Run RCA cable without any connection to chassis, arm base etc. with shield separated for each channel. Then add wire from the point where all ground connections(chassis, arm etc.) are tied onto, running to your Box screw. But I do not have either of these to be sure how the wiring has been done initially. However it is common that the chassis G is connected to RG shield.

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