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Phono Preamp Project

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    Posted: 30 Mar 2019 at 4:44am
Originally posted by Fatmangolf Fatmangolf wrote:

....they'd learn a lot from this thread just as I did. Thank you again.

Smile yep! As I think a lot have learned more than Graham might realize..! Because when you build a Genera for yourself and you power up for the first time and there's no flash or puff of smoke and you get to actually 'hear' the proof of what he has been saying...a ridiculous grin comes upon your face that's really hard to get off! And you find yourself playing record after record because it's so much fun listening to your stereo! Or, your "new" stereo... because it never sounded THIS GOOD! 
...and I haven't even finished [but I will, + print it all out for reference] past page 6! 
 Anyone that might be considering having a go at this little box, Go Ahead! Do It! Get yourself a smile like I did.. and even when you come back the next day and do it again - it happens again! Its great! 
Plus he says it will get better in (?) how long? 35 - 40 hrs of being on? better go read the Burn In Chapter on the Forum. See? It's all Here! 
Clap ThankYou! Graham. Best little box I ever built! Now, what's next... 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 19 Feb 2019 at 9:12pm
It's a pity as they'd learn a lot from this thread just as I did. Thank you again.

Jon

Open mind and ears, whilst owning GSP Genera, Accession, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 19 Feb 2019 at 5:46am
We'd need 136 billion viewings before Google put this in its results...

(unlike others....)
Not simple enough for Google-Bot to understand...
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2019 at 9:22pm
Thanks Graham. 136 thousand viewings was the other thing I noticed!
Jon

Open mind and ears, whilst owning GSP Genera, Accession, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2019 at 7:59pm
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.
Not simple enough for Google-Bot to understand...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jun 2018 at 9:07am
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.


Jon

Open mind and ears, whilst owning GSP Genera, Accession, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Alasdair Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jun 2018 at 8:06pm
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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