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Mains conditioning |
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peterb 
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Joined: 02 Feb 2017 Location: Cornwall Status: Offline Points: 354 |
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 Posted: 04 Mar 2017 at 5:20pm |
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Trying and failing too load jpegs of the scope snapshots, they seem to come out too large??
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Peter
--------------------------------------- Dual 505-1, Cyrus CD T, DIY 80W MosFet amp and PreAmp, 2xKEF 103.2 |
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peterb
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Joined: 02 Feb 2017 Location: Cornwall Status: Offline Points: 354 |
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Posted: 04 Mar 2017 at 5:24pm |
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Thanks for the reminder about the Genera. I still waiting for the replacement of my Ortofon Blue, promised next week !!
One of the jpegs I wanted to post was the PSU circuit diagram, which does include snubber caps.
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Peter
--------------------------------------- Dual 505-1, Cyrus CD T, DIY 80W MosFet amp and PreAmp, 2xKEF 103.2 |
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peterb
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Joined: 02 Feb 2017 Location: Cornwall Status: Offline Points: 354 |
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Posted: 04 Mar 2017 at 6:09pm |
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PSU Schematic 
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Peter
--------------------------------------- Dual 505-1, Cyrus CD T, DIY 80W MosFet amp and PreAmp, 2xKEF 103.2 |
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peterb
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Joined: 02 Feb 2017 Location: Cornwall Status: Offline Points: 354 |
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Posted: 04 Mar 2017 at 6:12pm |
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Scope snapshot of best case noise. Red = Right channel, Blue = Left Channel, Spectrum of Left channel 
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Peter
--------------------------------------- Dual 505-1, Cyrus CD T, DIY 80W MosFet amp and PreAmp, 2xKEF 103.2 |
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Richardl60
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Joined: 04 Nov 2014 Location: Yorkshire Status: Offline Points: 1475 |
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Posted: 04 Mar 2017 at 6:14pm |
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Cannot comment on the technical side at all but my simple logic tellls me that if left/right channel differ it may not be mains related, either a feature of the electronic or cable dressing?
My mains feed is external on the outside of the house but another option may be under floorboards? |
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peterb
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Joined: 02 Feb 2017 Location: Cornwall Status: Offline Points: 354 |
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Posted: 04 Mar 2017 at 6:15pm |
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Worst case, same colours, more sensitive voltage scale.  |
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Peter
--------------------------------------- Dual 505-1, Cyrus CD T, DIY 80W MosFet amp and PreAmp, 2xKEF 103.2 |
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peterb
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Joined: 02 Feb 2017 Location: Cornwall Status: Offline Points: 354 |
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Posted: 04 Mar 2017 at 6:34pm |
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I started with the same logic as you Richard but then the levels changed with no changes to the Pre ??
I might run a temporary spur from the consumer unit as a test, but not until the family are out for the day!
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Peter
--------------------------------------- Dual 505-1, Cyrus CD T, DIY 80W MosFet amp and PreAmp, 2xKEF 103.2 |
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