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Phono Preamp Project |
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Paperweight
Regular Joined: 21 Mar 2011 Location: Lexington NC US Status: Offline Points: 84 |
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Wow, that's a veritable treasure trove of info. Thanks Graham.
I almost miss paper books and underlining interesting parts with a red colored pencil.
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Fatmangolf
Moderator Group Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8960 |
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A great book list indeed. Thanks Graham.
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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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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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Some great explanations about circuit configurations and some blow a great big hole in some forms of current hi-fi thinking....
(especially section 2.1: buffer amplifiers) |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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Alasdair
New Member Joined: 30 May 2012 Status: Offline Points: 14 |
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As a long-time happy Genera user, I finally succumbed and bought a PSU1 power supply for it. I was surprised by the results - it upgrades the sound far more than I ever imagined it would. The sound is 'bigger' all round - more, better bass, wider, deeper stereo image - but it is also more delicate and detailed, with apparently quieter background. It's a big change for the better.
I have recently been enjoying an old Goldring G900 fitted with a Tonar hyperelliptical stylus from Mantra Audio, which sounds very fine. However it is very fussy about loading capacitance, so I rigged up a little supplementary board inside the Genera with 25pF, 100pF, 150pF and 220pF capacitors on it and dip switches to connect them in any combination. After quite a bit of experimenting I had settled on 150pF in the Genera (in parallel with tonearm wiring of 70-80pF). However the PSU1 seemed to clean the treble to the point where it sounded slightly rolled off, so more experimenting with loading was in order. With the PSU1, I found that 125pF lifted the top end a little and sounds 'just right'. With this setup, the G900 sounds absolutely splendid. For anyone thinking of buying a Genera, or any Genera owner thinking about possible improvements, the message is don't hesitate - the PSU1 power supply is a major upgrade which lifts the sound quality from the Genera and makes it sound like a higher class phono stage altogether. It's well worth the extra money.
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Fatmangolf
Moderator Group Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8960 |
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Thanks Alasdair, you've shown the value of trying these things out. I did something similar with my Genera, getting a PSU1 like you did and in trying loading options which help to get the turntable/cartridge sounding just right as you say. |
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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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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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Images are back. After a period where updates to diy-audio-kits.com accidentally took out important circuit diagrams, plots and photographs which illustrate this topic, they are now back in place.
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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Fatmangolf
Moderator Group Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8960 |
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Thanks Graham. 136 thousand viewings was the other thing I noticed!
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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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