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Static from Aesthetix phono stage when tt not on

I have a Rockport Serius II and Aesthetix IO Signature which are connected by a modest ground. Each outlet is dedicated and the audio service has a isolated ground to two ground bars.

I got the tt up and running with new audiophile vinyl and the sound was black in background, clear with high impact and dynamics and plenty of detail.

Everything seemed great for the first round. I weighed the stylus pressura and brought it within tolerance. There was NO STATIC in the music or when the music was not playing.

Today after running the Aesthetix for a day and after playing about 10 lp's there was static building up even when the TT was turned off.

I really don't know where to look for this one.

Is it the phono stage? The 25' Jena interconnects laying on the floor? The TT?

It does not appear to be the Tenor's as they have no noise in other channels.

Thoughts on the problem and identification pattern appreciated.

Bill E.
lakefrontroad

Showing 3 responses by albertporter

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albertporter
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Bill, is the static you are describing the kind that pulls at you when you remove the LP, or static in the sound?

How long have you had these components, and / or what have you changed lately?
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albertporter
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I have been told that in spite of the reputation and high quality of the Caddock resistors chosen for the Io, some of these have mechanical failure that causes noise and microphonics. They are the large black resistors near each group of tubes. You can try tapping them with a NON conductive tool to see if there is a reaction.

Be extremely careful touching things inside the Io. There are two supplies that together measure near 1100 volts ! I would very much like to keep seeing your posts here at Audiogon.

It the noise equal on both channels or limited to one?
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albertporter
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One more thing Bill. Even if the Rockport is turned off, the motor controller stays on all the time ( I think ). Do you have the one built by Rowland? If so, you might use a VOM to measure the output or chassis to ground and be sure there is not a leaking cap in the circuit.

Is the air supply pump for the Rockport on the same circuit with the other gear?
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