Hum in my system; its the turntable R and L interconnects. Huh?
Pioneer PL-570 reconditioned turntable
EAR Phono Box
Cambridge Audio Integrated amp
DALI Floorstanders
I have a very pronounced "Hum" in my system, sounds like a 60cycle hum. I tried all the troubleshooting steps; it originates in the EAR, which has just recently been serviced and has new Goldline tubes. But here is the kicker, if I disconnect the R and L TT interconnects the hum cuts out and I get a fine white noise sound of much less volume. The TT produces the hum in the system even if the TT is unplugged from the wall receptacle. Removing the ground wire from the TT to the EAR has no effect. I can place my ear on the EAR case and hear nothing, dead quiet. A fault inside the TT?
Thank you. I did that and it did not correct the issue. My experienced audio friend took one listen to the system and said its interference being picked up by the TT R & L cables. BTW: the interference is there even if the TT is not plugged in. I have for sure narrowed it down to the TT as the source. |
@jereeb The problem is the ground wire on the phono isn't making a connection. So the thing to do is run a wire from the tonearm base (assuming its metal) to the chassis of the EAR. If there is a screw securing the arm to the plinth of the turntable that is the ideal point to put the wire. The RCA cables and cartridge connections are obviously OK. Its normal for the 'table to not be plugged into the wall and have this happen if the ground wire has an open connection. |
Well it wouldn't be an aesthetic fix, but I could run a test wire from the tonearm base plate to the EAR based on your suggestion. Then if that corrects the problem I could flip the table over and make up a connection from the underside. Thanks so much for the suggestion!
[url=https://flic.kr/p/2qVrY4S][img]https://live.staticflickr.com/65535/54426095672_538c730196_z.jpg[/img][/url][url=https://flic.kr/p/2qVrY4S]20250118_130921[/url] by [url=https://www.flickr.com/photos/19310157@N06/]LCF Polestar[/url], on Flickr |
@jereeb Yes, that is what I would do. |
