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Occasional hum
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Chris Firth View Drop Down
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Points: 1413 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chris Firth Quote  Post ReplyReply Direct Link To This Post Posted: 25 Mar 2023 at 10:54am
Is there anything with a mains ground connected in your audio system?
Hook it up to there.

You posted before I finished typing.

Something else crossed my mind.
Are you still using AK's modified arm, and what is the arm tube made of?



Edited by Chris Firth - 25 Mar 2023 at 10:58am
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CageyH View Drop Down
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Points: 1576 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CageyH Quote  Post ReplyReply Direct Link To This Post Posted: 25 Mar 2023 at 12:53pm
The phono stage is connected to the mains, as is the pre and the power.

Yes, I have AKs modified arm, with an aluminium arm tube. 

I have just made a new grounding lead, with a floating shield. It has been plugged in for 15 minutes, and no signs of a hum. It may not be the theoretically optimal solution, but if it works, who cares?
Kevin
European loan coordinator, based near Toulouse, France.
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Chris Firth View Drop Down
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Joined: 16 May 2013
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Points: 1413 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chris Firth Quote  Post ReplyReply Direct Link To This Post Posted: 25 Mar 2023 at 12:59pm
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CageyH View Drop Down
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Points: 1576 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CageyH Quote  Post ReplyReply Direct Link To This Post Posted: Yesterday at 9:29am
The even simpler solution has been found. Just disconnect the grounding cable from the phono stage.
Why did I not think of this earlier?

Why, because it still hums…. Cry

Digital is so much easier.


Edited by CageyH - Yesterday at 9:31am
Kevin
European loan coordinator, based near Toulouse, France.
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