2. analog
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need help troubleshooting

here is my situation.just bought a turntable,hooked it up to my pre which is a modulus 3a.i only had sound out of my left speaker but very faint.heard quite a bit of feedback out of the right speaker when i touched the tonearm and i could hear music playing out of my cd player even when the pre was set to phono.i then tried alternating tubes,switching linestage for the tubes that were in the phono positions,situation remained unchanged.both speakers run when i play cd's but now with a lot of distortion when they had previously been fine.flip flopped the phono cables but that didn't help.the tt was used but i listened to it in the store,however not with the pre-amp.any help would be appreciated.
dicobrazil
mcfarland
356 posts
 
Check tonearm wiring, particularly the ground wire, including the cartridge /headshell connections. I hope this helps. Happy Listening.
bdgregory
1,580 posts
 
Check tonearm wiring, particularly the ground wire, including the cartridge/headshell connections.

also - is your table/tonearm new? it's possble the internal tonearm wiring is the culprit (especially if it's used). You may want to check each of the leads for continuity and shorts from the headshell to the interconnect. Also check your ground wire for continuity from arm to preamp connection.
dicobrazil OP
33 posts
 
thanks for the input guys.the vpi tonearm is used but is the same one that i demoed at the store with the tt,which is a tnt junior.the only thing different about the unit is the phono cable.i have a multimeter,how would i go about checking the integrity of the cable? i just tried unhooking the phono cable from the pre but get noticeable distortion from my left speaker only when i play a cd.cheers.
dweller's avatar
dweller
2,152 posts
 
If you have not had a turntable in your system for a while (or ever), try switching your input selector back-and-forth to scrape off any tarnish for a good connection.

Also, make sure you're plugged into the phono inputs of the modulus 3a.
dicobrazil OP
33 posts
 
thanks dweller,i will work in the selector knob.kind of stumped as to why i have these issues even when i take the turntable and cable out of the equation.first time tt owner so i am a complete newb in this regard.not sure if the phono stage was used on the pre as i purchased it used.cheers.
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