I'm sure I'm not the only one who has experienced this: I have a system with (among other components) a Yamaha RX-797 receiver and a Stanton STR8-80 turntable.
When I set the system up, I had some horrendous problems with 60 Hz hum with several of the components. Over time, I have managed to eliminate this problem in every component except the turntable. After first determining that the house wiring itself was good (checked all the outlets), I looked at the cartridge, the wiring in the headshell...I tried tying all the component chassis grounds together, all to no avail. In fact, when I tried this last strategy, I not only failed to eliminate the hum, I actually got 120 Hz harmonics on top of it!
Recently, I read that the STR8-80 turntable had been notorious for hum. The turntable uses a two-prong AC line cord, rather than a three-prong with the earth ground pin. It was suggested that the line cord be replaced with one having the earth ground. This I did, making sure to match the hot and neutral connections of the new cord to that of the old one on the PC board, and I ran the earth ground wire to the turntable chassis ground.
Not only did this fail to get rid of the hum, it actually made it worse. Long story short, I am out of ideas. Anyone out there who knows how to fix this beast?
Thanks in advance for your help.
When I set the system up, I had some horrendous problems with 60 Hz hum with several of the components. Over time, I have managed to eliminate this problem in every component except the turntable. After first determining that the house wiring itself was good (checked all the outlets), I looked at the cartridge, the wiring in the headshell...I tried tying all the component chassis grounds together, all to no avail. In fact, when I tried this last strategy, I not only failed to eliminate the hum, I actually got 120 Hz harmonics on top of it!
Recently, I read that the STR8-80 turntable had been notorious for hum. The turntable uses a two-prong AC line cord, rather than a three-prong with the earth ground pin. It was suggested that the line cord be replaced with one having the earth ground. This I did, making sure to match the hot and neutral connections of the new cord to that of the old one on the PC board, and I ran the earth ground wire to the turntable chassis ground.
Not only did this fail to get rid of the hum, it actually made it worse. Long story short, I am out of ideas. Anyone out there who knows how to fix this beast?
Thanks in advance for your help.