Posted by Russellc [ 64.218.106.114 ] on September 16, 2006 at 22:16:56:

In Reply to: Re: turntable buzz (grounding) posted by Bill Rue on September 16, 2006 at 17:29:18:

I really dont know if that motor is shielded or not...that is one cause of hum with grados, but hum can be, as others have pointed out, from various different sources. Have you previously sucessfully used grados with this set up? Of course, of all components, phonos can be the worst hum problems, lots of gain on small signals, what is this turned up you are talking about? are you listening through headphones? Using a headphone amp for a pre or what? As gain is increased, hum generally will worsen if present. My mains are Altec A7s, well over 100db efficient, so hum MUST be kept to a minimum to be tolerable to say the least. Have any other cartridges to use to determine if it makes a difference?

Russellc

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