I have what sounds like a un-grounded buz on my dual. It is most noticible when the turntable is on, but not spinning. It is also there between songs, but it is greatly diminished once the arm is engaged and the platter starts turning. I do have the table grounded to the receiver's antenna ground connector. Can anyone guide me on this?

Is the buzz in the left channel, the right channel, or both channels?

Fred

Is the buzz in the left channel, the right channel, or both channels?

Fred

Both

Then you have a system ground problem -- probably.

If I were standing there, I'd take my ohmmeter and see if the chassis and tonearm of the 1015 are connected to the turntable ground wire. Ideally, there should be only one ohm or so of resistance between chassis/arm and ground wire. Higher -- and you need to chase down the cause of the discontinuity.

The antenna ground is usually not my first choice of where to attach the ground wire to your receiver. If your receiver has a phono preamp, there is always a ground connection right next to the PHONO input jacks. This is the preferred grounding point. If your receiver does not have a phono preamp and doesn't have phono jacks, then you will need an external phono preamp, in which case you will still need to find a good ground point on the receiver -- usually the wire can slip under a machine screw.

Some phono preamps, notably those those by LKG (Pfanstiehl) up to about a year ago have an internal ground problem, requiring that the chassis of the preamp be attached via a separate ground wire to the chassis of the receiver. I personally contacted the LKG company about this defect, as it was showing up on scores of their preamps, requiring that I modify every one. They have corrected this defect.

It is possible that you have a miswired cartridge and/or that the contacts in the carrier receptable are highly oxidized. One contact in the receptable will be for ground. If you need to resurface it, use a tiny piece of green pad held in hemostats or s sliver of #1000 or finer sandpaper. The push-ons that slide on the cartridge pins often oxidize and need to be reamed with a needle file.

As well, you will often find that the crimps used for the four signal wires in the cartridge carrier have oxidized. I often have to hardwire around the crimps. This is a delicate and difficult but necessary operation.

Hope this into helps.

Fred

WARNING: Do not hang an ohmmeter current across a phono cartridge. Always use a 100k current-limiting resistor in series with your probe.

Then you have a system ground problem -- probably.

If I were standing there, I'd take my ohmmeter and see if the chassis and tonearm of the 1015 are connected to the turntable ground wire. Ideally, there should be only one ohm or so of resistance between chassis/arm and ground wire. Higher -- and you need to chase down the cause of the discontinuity.

The antenna ground is usually not my first choice of where to attach the ground wire to your receiver. If your receiver has a phono preamp, there is always a ground connection right next to the PHONO input jacks. This is the preferred grounding point. If your receiver does not have a phono preamp and doesn't have phono jacks, then you will need an external phono preamp, in which case you will still need to find a good ground point on the receiver -- usually the wire can slip under a machine screw.

Some phono preamps, notably those those by LKG (Pfanstiehl) up to about a year ago have an internal ground problem, requiring that the chassis of the preamp be attached via a separate ground wire to the chassis of the receiver. I personally contacted the LKG company about this defect, as it was showing up on scores of their preamps, requiring that I modify every one. They have corrected this defect.

It is possible that you have a miswired cartridge and/or that the contacts in the carrier receptable are highly oxidized. One contact in the receptable will be for ground. If you need to resurface it, use a tiny piece of green pad held in hemostats or s sliver of #1000 or finer sandpaper. The push-ons that slide on the cartridge pins often oxidize and need to be reamed with a needle file.

As well, you will often find that the crimps used for the four signal wires in the cartridge carrier have oxidized. I often have to hardwire around the crimps. This is a delicate and difficult but necessary operation.

Hope this into helps.

Fred

WARNING: Do not hang an ohmmeter current across a phono cartridge. Always use a 100k current-limiting resistor in series with your probe.

Thank you very much for such great information.

Then you have a system ground problem -- probably.

If I were standing there, I'd take my ohmmeter and see if the chassis and tonearm of the 1015 are connected to the turntable ground wire. Ideally, there should be only one ohm or so of resistance between chassis/arm and ground wire. Higher -- and you need to chase down the cause of the discontinuity.

The antenna ground is usually not my first choice of where to attach the ground wire to your receiver. If your receiver has a phono preamp, there is always a ground connection right next to the PHONO input jacks. This is the preferred grounding point. If your receiver does not have a phono preamp and doesn't have phono jacks, then you will need an external phono preamp, in which case you will still need to find a good ground point on the receiver -- usually the wire can slip under a machine screw.

Some phono preamps, notably those those by LKG (Pfanstiehl) up to about a year ago have an internal ground problem, requiring that the chassis of the preamp be attached via a separate ground wire to the chassis of the receiver. I personally contacted the LKG company about this defect, as it was showing up on scores of their preamps, requiring that I modify every one. They have corrected this defect.

It is possible that you have a miswired cartridge and/or that the contacts in the carrier receptable are highly oxidized. One contact in the receptable will be for ground. If you need to resurface it, use a tiny piece of green pad held in hemostats or s sliver of #1000 or finer sandpaper. The push-ons that slide on the cartridge pins often oxidize and need to be reamed with a needle file.

As well, you will often find that the crimps used for the four signal wires in the cartridge carrier have oxidized. I often have to hardwire around the crimps. This is a delicate and difficult but necessary operation.

Hope this into helps.

Fred

WARNING: Do not hang an ohmmeter current across a phono cartridge. Always use a 100k current-limiting resistor in series with your probe.


Oh boy, it just keeps getting better. I forgot to mention that there was a hum as well as a buzz. So I took the cartridge holder off to clean the connections and the hum got much louder. There is obviously something amiss with the ground in the table. In fact, I did the ohm meter to the tonearm and chasis of the table and the ground and there is no connection between them. So I decided to take off the motor and lubricate things a bit and now that I have things together again, the table spins when the arm is at rest and the switch to start things no longer works. I can't imagine what I did.

Try replacing the RCA cables. Two out of Two of my duals had bad RCA cables causing humming problems.

Eather that or teach it the lyrics.

Try replacing the RCA cables. Two out of Two of my duals had bad RCA cables causing humming problems.

Eather that or teach it the lyrics.

Brand new RCA cables on it. It did the same with the last pair.

Ok, I have deducted that the problem is with the receiver and not the turntable. However, the turntable is screwed up now. It spins when the tone arm is rested.

Ok, I have deducted that the problem is with the receiver and not the turntable. However, the turntable is screwed up now. It spins when the tone arm is rested.

Now the turntable is working perfectly and is much less noisy than it was. However, there is definately an issue with the phono pre-amp.