When the tone arm gets towards the end of the disc, there is a loud 50Hz hum coming through the amp & speakers. At the begining of the disc everything is quiet. Everything is earthed correctly and this problem started one day quite suddenly. Sony dealer says this is too old to be economically repaired; anybody got any good ideas? The deck is only a few years old.
I have Origin Live Aurora turntable and Origin Live Encounter tonearm with Clearaudio Virtuoso Wood cartridge. When I lift record off the turntable, a very loud sound (60-100 Hz) comes out of speakers. So I always reduce the volume considerably to change the record. The tonearm wire is properly grounded to the phono preamp ground terminal. I also tried to ground the chassis by connecting a wire from tonearm base to ground receptacle of AC plug. All failed to solve the problem. The worst part is there is a very loud pop once in a while during the play especially in winter. The humidity in the room is 60 - 65%. I'd appreciate your suggestion.
To me it sounds like there is a problem wth the wiring from the tonearm i would check that all your connections are firmly sodered in place it sounds like there is just a loose wire that is losing its ground connection.
HAVE YOU GOT ANY OTHER EQUIPMENT CONNECTED IF SO DISCONNECT THEM THEN JUST USE THE AMP,DECK AND SPEAKERS AND MAKE SURE THERE IS NOTHING ELSE PLUGGED INTO THE SAME CONNECTING LINE
THEN ADD THE OTHER ITEMS ONE BY ONE
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The hum of course is the 60 cycle line AC voltage. Make sure that the routing of the AC power plug is as distant as possible from the stereo RCA cables.
The most likely problem is the connection of the phono cartridge to the wires in the arm. These connections usually are silver plated and become oxidized creating a bad connection. Remove the cartridge and using a fine eraser polish the connections. There is a ground connection that makes the five wire connection. Be super carfull these terminals are very easy to break
The phono connections to the stereo is very low voltage subject to interference. The connection to the magnetic pickup at the tone arm is low impedance and is inductive. Any poor connection between the cartridge up to the AV316 will produce this hum. Continue to check connections and swap cables with a known good to resolve.
I have switched the left and right cables to ensure that the cable is not the problem.
Not at all in this case. You either have a loose wire to connections to the cartridge, which can be fixed by hand. Just push the wires on to the cartridge. Or you have a fault in the power supply of the deck. Most likely a mains filter capacitor that is letting the 50hz mains hum in.
The hum will either be caused by a poor earth connection or a power supply problem. The stylus would not cause any hum at all.
Hello! Did you connect single black ground wire to the "ground" terminal at your amp? Probably not! Or, it got stepped on it, while moving around. Professional of hi-fi turntables using magnetic cartridges and require 2 well shielded audio cables, connected directly to the cartridge, plus separate ground wire, which attached to all the metal parts of tone arm and body. Failure to connect this wire to the body(metal) or the amplifier, will cause this loud "hum". thanks, Alex.
The Levitator is a tone arm "auto lifter" for turn tables and record players that do not have an "auto-return" feature, or has one that is broken. If your needle rides in the "wax trail-off" area of a record it can damage the needle, along with making a horrible noise. It is not enjoyable to have to babysit your records and manually take your tone arm off the record the moment it is done. The Levitator does it for you so you can relax and go about your business. When the record is done the tone arm trips the lever triggering the lifter to raise your tone arm/needle off the record. It is designed with adjustable height to fit any turntable. These are available for sale through Ebay,or please see video to order your own. http://www.youtube.com/watch?v=PS6g9rQRF9M&feature=mfu_in_order&list=UL
The ground wire should be attached to the metal chassis or the tone arm metal assembly, the other end should be attached to the metal chassis of the amplifier. If the ground wire is not used, you will get real loud hum through the amplifier.
To test the wires are working. Connect the deck to the amp and turn the amp on. Normal volume will do.
Before that disconnect all the wires to the cartridge.
Now with the amp on, touch each of the wires one at a time with your finger. On two of the wires you should hear a buzz, one on the left, one on the right. You might hear a slight hum or crackle on the two other wires or nothing at all.
If you don't hear any loud buzz on two of the wires, then the wires have become disconnected somewhere or the inbuilt pre-amp inside your amp has failed.
If you hear buzz on both channels you have either bad connections to the cartridge or the cartridge has failed.
If the force is towards the center of the disk, it's OK, it's the antiskating force. Set antiskating at 0, set the weight at 0gr, turn around the makeweight in order to set the tone arm parallel to the disk. With the antiskating at 0 the tone arm will stay parallel to the disk in the place you leave it. With the antiskating at any other position the tone arm will stay parallel to the disk going towards the center of the disk.
In case of a problem or clarification, don't hesitate to post.
Thanks and regards Please kindly rate this solution Stelios direct FiXya link: http://www.fixya.com/users/technical114