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 Post subject: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 9:03 am 
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Location: Oakville, ON, CA
I have a hum in my brand new Rega Rp3. It gets worse the closer the tone arm gets to the spindle. Anyone else encounter this problem? Is there a fix for it?


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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 9:21 am 
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Location: Victoria, BC, CA
Does it have the supplied Rega cartridge or a different cartridge?


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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 9:51 am 
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Location: Markham, ON, CA
Classic ground hum. Be sure that the tonearm and motor are grounded. As this is a new tonearm I am assuming that there are no partial shorts/broken wires in the tonearm....sometimes these very thin wires can be damaged...and hum.

The fact that the hum changes when the tonearm is moved shows me that this issue is turntable-specific (not the RCA cables to the pre-amp as an example).

Grounding is almost always the key. Start with the tonearm (all my tonearms have a 5th wire...that is used for grounding. You can run a thin wire from the tonearm pivot via the big nut underneath the plynth. Take it to the pre-amp (which also should be grounded to the amp). Take a wire from the metal support for the spindle or the motor and join it to the tonearm wire. You can splice them both together under the plynth or run two wires to the pre-amp.

Speaking of grounds, I also use a "dust-bug" carbon brush arm and run that one to ground as well. This eliminates any static on the record itself....there are less pops and no hiss.

If you bought this turntable at a store, ask them to investigate it. Otherwise the above steps should eliminate any stray ground issues. There may be other issues, but the above grounds should always be used regardless.

Please let us know what happens.

Tom


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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 10:10 am 
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cyrus wrote:
Does it have the supplied Rega cartridge or a different cartridge?
Yes, if it is an Elys2 there is a real good chance its the cart.

Sent from my Pixel XL using Tapatalk

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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 10:18 am 
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Forbes_2 wrote:
cyrus wrote:
Does it have the supplied Rega cartridge or a different cartridge?
Yes, if it is an Elys2 there is a real good chance its the cart.

Sent from my Pixel XL using Tapatalk


Wow. I had not theard that...any idea why?

Thnks, Tom


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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 10:21 am 
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Location: Toronto, ON, CA
Why not just take it back to the dealer.
This is the second thread in less than a week on the same ground hum issue on a new Rega table.
Whats up with that??

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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 10:27 am 
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I lived with a slight hum (as described above in terms of increasing as arm drew nearer to center) with my RP3 Elys2 combo...when I upgraded my cart to a Goldring Eroica LX (MC) issue resolved...

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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 10:47 am 
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Location: Montreal, QC, CA
are you using a ttpsu?


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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 10:50 am 
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...I was...and am...

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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 12:02 pm 
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Location: Toronto, ON, CA
Grado cartridges will often hum slightly in a Rega as well.


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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 1:25 pm 
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Sgt Pepper wrote:
Grado cartridges will often hum slightly in a Rega as well.


Do you think that separate grounding of the arm might fix this? I have two Rega arms (actually origin Live 250s) on a P3 and Thorens 150 and don't have any problems. But I have them both with a 5th Cardas wire to ground. Carts are Hana SL and DV 10X5. I wonder if microphonics are at play with the Elise and Grados......

This is intriguing....


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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 2:29 pm 
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Location: St.Catharines, ON, CA
This is a lingering problem with the cheap Rega TT's.
Separating chassis(shield) from cartridge ground should've been done at the factory.
Most likely is the cause of hum.


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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 2:34 pm 
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Location: Toronto, ON, CA
brownslane wrote:
Sgt Pepper wrote:
Grado cartridges will often hum slightly in a Rega as well.


Do you think that separate grounding of the arm might fix this? I have two Rega arms (actually origin Live 250s) on a P3 and Thorens 150 and don't have any problems. But I have them both with a 5th Cardas wire to ground. Carts are Hana SL and DV 10X5. I wonder if microphonics are at play with the Elise and Grados......

This is intriguing....



The Grado cartridges are designed with a minimum of shielding ( benefit sonically) but the downside is the slight bit of hum as the cartridge passes close to the motor. I have dealt with it as a dealer from the 1970's onward and there really was nothing that could be done. Having said that, the hum is so low that it is really inaudible during music passages. I remember doing everything from trying to better shield the motor of the turntable but in the end, we just lived with it.


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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 3:50 pm 
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Location: Brechin, ON, CA
The issue with all Rega tone arms when it comes to humming issues is the lack of an independent ground cable.

If you are planning on working / keeping this table, tone arm & cartridge configuration, you may opt to have the tone arm rewired, specifically, the proper grounding of the arm tube. Also included in the rewiring upgrade are far better cartridge clips...as the originals from Rega tend to be sub par, especially after a few cartridge changes....

There are many companies that offer up rewiring upgrades for Rega tone arms...Origin Live, UK offers up excellent service.

Hope this helps,

Francis R. :D

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 Post subject: Re: Rega Rp3 hum
PostPosted: Wed Mar 21, 2018 4:10 pm 
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Location: Toronto, ON, CA
If it was a wiring issue, I would think that the hum would be present with all cartridges. It isn't.


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