I am getting major feedback from my speakers, only when I use the turntable. I cannot make cd's as the feedback is also being recorded to the cd. I have search the web over and haven't found a solution. I purchased a line conditioner/surge protector and that doesn't help. Someone with the same problem and fixed it, please let me know how you solved it
The reason for the hum is as follows:
1) The phono input on the receiver contains an additional stage of amplification required for typical turntables.
2) Pluggin in a unit that has a signal level too high will generate this hum.
3) Your turntable contains an pre-amp that allows it to work using an aux input (or tape input) as most receivers today no longer have phono inputs.
4) Grounding issues relate to the older types of turntables where there was NO pre-amp stage inside the turntable. In this case ,the signal levels were so low that stray noise would often get in the way of the signal. Proper grounding would elimiate this noise.
Hope this helps.
Dan
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Thanks Palaboy,
To avoid confusion, the annoying sound is hum, not feedback. My turntable is a PS-LX300USB, not the 250. The setup instructions do not mention anything about a ground.
Product Features
* Belt drive system; fully automatic operation
* Supports 33-1/3 and 45 rpm record playback speeds
* Built-in phono preamp; EQ switch for devices without a phono input
* USB output and included Audio Studio software let you import record tracks to a PC in MP3 audio format; L/R RCA audio output
* Signal-to-noise ratio: >50dB
* Includes dust cover
Your solution sounds like it should work, but I cannot find a grounding point on the turntable, the bottom is plastic, should I attach a ground wire to one of the adjustable feet screws? And the feedback only occurs when the amp is set to phono, even when I am not playing an album. When I touch the turntable arm the hum gets louder, even louder when I touch it with more pressure. I made an on line request to Sony's parts website for bran/model of cartridge. Would you be so kind in some more of your professional assistance? Thank you palaboy in advance. John
Thank you Palaboy, I connected to aux and it works! :-)
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