Humming from the preamplifier

[iosman123]

Hello,

 

I have a DJ Tech Vinyl 5 turntable. I would like to connect it to a computer. I bought the appropriate cables, i.e. 2Chinch-2Chinch and 2Chinch-MiniJack. I also bought the RIAA preamplifier.After connecting in the headphones I heard a horrible continuous buzzing. I thought the 2chinch-2chinch cable was suspicious because I bought it for PLN 5, so what are you talking about? The next day I bought a decent new cable. The humming has dropped by about half, but it still occurs. Yesterday I fought with it all day and came to the conclusion that the power supply will also be guilty. When I put my ear to it, you can hear a similar buzzing like in headphones. Today I got a non-power supply. I connected to the preamplifier, the buzz minimally dropped but still occurs. What's interesting, if I connect the turntable in order: gramophone ---> preamplifier ---> the tower is hardly audible. You have to really report a lot to hear them. I installed the drivers on the computer and continued the same. Ideas are over. There is also the case that in my room the sockets do not have a grounding pin. I noticed something like that. If everything is connected as it should be, I hear a buzzing in the headphones and if I pull the plug from the turntable out of the socket and touch it with the chinch screen, the humming falls by half. So it's probably something with grounding. My question is how to do it in my situation? I have a GND screw in the turntable, but in the preamplifier there is no indicated place where it would be possible to give ground.

 

thanks

iosman

[iosman123]

Dnia 7/30/2019 o 2:46 PM, iosman123 napisał:

Hello,

 

I have a DJ Tech Vinyl 5 turntable. I would like to connect it to a computer. I bought the appropriate cables, i.e. 2Chinch-2Chinch and 2Chinch-MiniJack. I also bought the RIAA preamplifier.After connecting in the headphones I heard a horrible continuous buzzing. I thought the 2chinch-2chinch cable was suspicious because I bought it for PLN 5, so what are you talking about? The next day I bought a decent new cable. The humming has dropped by about half, but it still occurs. Yesterday I fought with it all day and came to the conclusion that the power supply will also be guilty. When I put my ear to it, you can hear a similar buzzing like in headphones. Today I got a non-power supply. I connected to the preamplifier, the buzz minimally dropped but still occurs. 12v Air Compressor What's interesting, if I connect the turntable in order: gramophone ---> preamplifier ---> the tower is hardly audible. You have to really report a lot to hear them. I installed the drivers on the computer and continued the same. Ideas are over. There is also the case that in my room the sockets do not have a grounding pin. I noticed something like that. If everything is connected as it should be, I hear a buzzing in the headphones and if I pull the plug from the turntable out of the socket and touch it with the chinch screen, the humming falls by half. So it's probably something with grounding. My question is how to do it in my situation? I have a GND screw in the turntable, but in the preamplifier there is no indicated place where it would be possible to give ground.

 

thanks

iosman

 

thanks my issue has been fixed.