Hi All, I am just now getting my Dual 1229Q up and running. I have cleaned all the connections and it starting to sound good. However, I have a 60hz buzz in the left channel that goes away when the arm lifts up and moves over to the LP. As soon as the needle hits the LP, the buzz comes back. Scratching my head over this one....any suggestions??? Cheers.

Ground wire connected?

Check that the 4 connections are firm and secure on the back of the cart. Remove and re-seat them.

Also check and see if you have a bad shielding in the cables coax . Or even the wires on the arm / cart could be causing problems if loose or not a very good connection .



Good luck



Barney

Bill, I cleaned the cart connections really well with no change.

Barney, I'll do some cable swapping tonight. Cheers.

Hi All, I am just now getting my Dual 1229Q up and running. I have cleaned all the connections and it starting to sound good. However, I have a 60hz buzz in the left channel that goes away when the arm lifts up and moves over to the LP. As soon as the needle hits the LP, the buzz comes back. Scratching my head over this one....any suggestions??? Cheers.

You have an open ground connection in the turntable left channel. You need to trace all wiring from the cartridge to the output and circuitry ground.

Chances are high that the disconnect is happening at the headshell interface. The Dual 12xx turntable have the sled type mount where the fingerlift acts as a locking keyway. I've seen two variations of this headshell connect: 1- is has curved contact tags that interface with contact areas in the arm mounted part of the shell; 2- the headshell sled with a VTA adjustment knob for multiple LPs (stacking). This one has pins, instead of flexible tags.
If you have the more common first type, the fix is pretty straightforward. Use a rounded tooth pick or the wooden shaft of a Q-tip and slide them underneath all four of the contact tags - restoring their "proud" attitude for their contacts. While you've got them all supported in this way, take a small bit of fine emory cloth and clean up the contact area. If you have a de-oxit on hand, it wouldn't hurt to give them a little coat.
If you have the pin version, the fix is a little more problematic because the rigid pins tend to press in and deform the fixed contact area over the years. I've repaired this contact by adding a bit of tinning (solder) to the offending pin - in your case the one that is connected to the white lead (left channel ground).
Hope this helps.
- Mario

Hope the problem not in the arm..........



Barney

Have you tried a different set of RCA cables?

Good morning, an interesting one. It does sound like an earthing issue but perhaps something else as well. If the true problem cannot be found might I suggest a 'solution' of sorts.

On one of my systems I have an audible buzz despite alll wiring being ok. In the end I used the OOPS (out of phase system wiring configuration) which effectively cancelled the buzz completely.

For those unfamiliar with OOPS, one channel is deliberately reversed at the cartridge and the corresponding channel speaker is also reversed thereby bringing everything back in phase overall, however there is phase cancellation of noise etc within the amplifying stages. Worth a try, but be aware that this only works with phono sources and all other (line level) inputs will be out of phase. Regards, Felix aka catman.