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Occasional hum |
Post Reply | Page 123 11> |
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patientot
Senior Member Joined: 28 Nov 2018 Location: USA Status: Offline Points: 1523 |
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Posted: 20 Dec 2023 at 4:29pm |
Glad it worked out.
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SL-1200 MK7 (modified) + Reflex M + PSU-1 used with AT150-40ML, AT VM95ML, Stanton 680mkII + Ogura, and Shure M35X cartridges.
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RichW
Senior Member Joined: 21 Jan 2013 Location: UK Status: Offline Points: 1471 |
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Well done for sorting out the problem Kevin.
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Majestic/Enigma, Accession MM & MC.
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Fatmangolf
Moderator Group Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8960 |
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Well done and thank you for sharing.
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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CageyH
Senior Member Joined: 30 Apr 2012 Location: Toulouse, Franc Status: Offline Points: 1678 |
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It has been about an hour since I made my changes.
I have not had the faintest sign of the hum. I think I can put this subject to bed, and move on.
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Kevin
European loan coordinator, based near Toulouse, France. |
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BackinBlack
Senior Member Joined: 05 Feb 2012 Location: Hinton, N'hants Status: Offline Points: 2020 |
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Glad to know that you're getting somewhere near solving the problem. Earth loops/pickup can be so difficult to isolate. I find that turntables are the worst culprit, earthing arrangements can be so haphazard, or even non existant. Happy Listening Ian
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Just listen, if it sounds good to you, enjoy it.
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CageyH
Senior Member Joined: 30 Apr 2012 Location: Toulouse, Franc Status: Offline Points: 1678 |
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I have altered the earthing scheme and cable layout, and have managed to reduce the hum significantly.
It seems that it was either an earth loop, or loop pick up. It is not perfect, but I will do a better job in the Christmas holidays.
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Kevin
European loan coordinator, based near Toulouse, France. |
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CageyH
Senior Member Joined: 30 Apr 2012 Location: Toulouse, Franc Status: Offline Points: 1678 |
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Playing around with Audacity, I have managed to produce a plot, that confirms it is mains related:
There is a noise at 50Hz and a bigger one at 100Hz. I guess I don't have many option of filtering this 100Hz noise out? It makes me wonder if this is ground loop related, and if so would a mains isolation transformer help? |
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Kevin
European loan coordinator, based near Toulouse, France. |
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Post Reply | Page 123 11> |
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