Left channel hum!

Joined
May 15, 2019
Messages
91
Location
Los Angeles
I was listening to some records yesterday and noticed that there was a hum coming from the left channel and that the overall volume from the left channel was lower than the right. The hum dampened significantly if I touched any metal part on any of the connected equipment.

I was able to test my headphone amp and pre-amp and all the connecting audio cables and they all work fine, so, I'm pretty sure it's something on my U-Turn turntable. I'm thinking it's the wires that connect to the cartridge (I'm using a Grado Black, the newer version) but I haven't had time to remove and re-attach the wires. Could there be any other things I can check out on the turntable? Or is my instinct to remove and re-attach the wires to the cartridge the correct next step?

Thanks for the help!
 

HiFi Guy

All Things Audio
Moderator
Joined
May 15, 2019
Messages
517
Location
Orlando, Florida
I was listening to some records yesterday and noticed that there was a hum coming from the left channel and that the overall volume from the left channel was lower than the right. The hum dampened significantly if I touched any metal part on any of the connected equipment.

I was able to test my headphone amp and pre-amp and all the connecting audio cables and they all work fine, so, I'm pretty sure it's something on my U-Turn turntable. I'm thinking it's the wires that connect to the cartridge (I'm using a Grado Black, the newer version) but I haven't had time to remove and re-attach the wires. Could there be any other things I can check out on the turntable? Or is my instinct to remove and re-attach the wires to the cartridge the correct next step?

Thanks for the help!
Sounds like a bad cartridge if you've tried everything else. Swap the green/red and white /blue wires and if the problem changes to the right channel, it's the cartridge. If it stays on the same channel, the cartridge is fine.

I've had this happen to me once, unfortunately with a rather expensive Dynavector.
 
Joined
May 15, 2019
Messages
91
Location
Los Angeles
Sounds like a bad cartridge if you've tried everything else. Swap the green/red and white /blue wires and if the problem changes to the right channel, it's the cartridge. If it stays on the same channel, the cartridge is fine.

I've had this happen to me once, unfortunately with a rather expensive Dynavector.
Thanks! I will test that! If that’s the case, I’ll be superb bummed as my 1 year Grado warranty literally ended 3 weeks ago. :( Maybe they’ll make an exception if I email and ask nicely.
 

Waitressboy

Member
Joined
May 16, 2019
Messages
73
Location
Buenos Aires, Argentina
I've been having the same problem since last weekend. I don't know what caused it because I didn't change or move anything. But I discovered that touching the headshell with something made of metal, the hum disappears. As I have zero money to buy a new cartridge, I'll stay with my DIY method :LOL:
 
Joined
May 15, 2019
Messages
91
Location
Los Angeles
I've been having the same problem since last weekend. I don't know what caused it because I didn't change or move anything. But I discovered that touching the headshell with something made of metal, the hum disappears. As I have zero money to buy a new cartridge, I'll stay with my DIY method :LOL:
I didn’t play any records for maybe a week, as I got in a groove just listening to cassettes in my queue. It has been abnormally hot and cold in SoCal the last week or so and that’s the only environmental change I can think of that might cause some internal issues with a functioning cartridge?
 
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