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Old 19th January 2013, 08:55 AM   #1141
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here is how mine is done, once the cases are added the chassis earths will terminate on the other side of the C/R you can see on the floor. This will all be inside the PSU case, it's a 3 box affair.

Click the image to open in full size.

larger image
http://farm9.staticflickr.com/8507/8...48611c3e_b.jpg
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Old 19th January 2013, 08:59 AM   #1142
chiily is offline chiily  United Kingdom
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Nice, you just made my weekend
I should say that I don't have any 2.7nf so I used 4.7nF...

Anyone have a couple if 2.7nF they could pass on please?

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Old 19th January 2013, 09:13 AM   #1143
FdW is offline FdW  Netherlands
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Location: Both feet on the ground (near Gouda)
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Originally Posted by chiily View Post
I should say that I don't have any 2.7nf so I used 4.7nF...

Anyone have a couple if 2.7nF they could pass on please?

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Using 4.7n will limit the BW to around 1Mhz (otherwise near 2.5Mhz (about)). I do not think that this is a problem the actual regulation is done by the shunt (and that one is a max speed).
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Old 19th January 2013, 09:16 AM   #1144
quan is online now quan  Australia
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Originally Posted by sq225917 View Post
Run an extra earth wire from each power supply pcb back to the star earth you have on the chassis floor. I can't see if you have this already.
Hi , thanks for confirming that . I was ready and did connect via a 10R resistor to start chasis but then disconnect it as per Franz guide. I will re- do it.
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Old 19th January 2013, 10:05 AM   #1145
pdul is offline pdul  Denmark
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Here is a picture of my build. Suggestions for groundings? Currently still humming and more on the L channel ( measured 6V on pin6 of IC and test point of 6800uf capacitor).
Something is wrong, if you have 6v on the 6800uf cap. It should only be around 0,5v
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Old 19th January 2013, 10:52 AM   #1146
quan is online now quan  Australia
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Here is a picture of my build. Suggestions for groundings? Currently still humming and more on the L channel ( measured 6V on pin6 of IC and test point of 6800uf capacitor).
Something is wrong, if you have 6v on the 6800uf cap. It should only be around 0,5v
Yeah, as communicated previously with Alfred and the suggestions was to wait for a few days to see if it is going to settle down. My other channel measures only 0.5V. I am not sure where to look at ? Input transistors?
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Old 19th January 2013, 12:08 PM   #1147
FdW is offline FdW  Netherlands
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Quote:
Originally Posted by pdul View Post
Here is a picture of my build. Suggestions for groundings? Currently still humming and more on the L channel ( measured 6V on pin6 of IC and test point of 6800uf capacitor).
Something is wrong, if you have 6v on the 6800uf cap. It should only be around 0,5v
See Mpp #7730 and the building guide.

These are the most important/relevant messages regarding PSU and Pre-Reg.
  1. Mpp #4375 PSU-pre-regulator.
  2. Mpp #4610 V2 Schemas UPS and Amp.
  3. Mpp #6506 CCS fine-tuning.
  4. Mpp #6462 PSU with my notes.
  5. Mpp #6809 Do not try to feed the CVS of the CCS of the shunt with a regulated power supply.
  6. Mpp #7127 More about transformer selection.
  7. Mpp #7635 Single and dual transformer wiring (also corrected drawing) (See also #7733).
  8. Mpp #7733 Grounding (PSU, RIAA and Player).
  9. Mpp #7810 35V PSU for the CroMagnon.
  10. Mpp #7830 The PSU explained.
  11. PradiseBuilders #13 Schema's and assembly guide.
  12. PradiseBuilders #155 Vdc input voltage minimum simulated.
  13. PradiseBuilders #970 PSU oscillates; posible solutions?
  14. PradiseBuilders #983 Compensating the PSU for oscillations.
  15. PradiseBuilders #1130 Updated 'Paradise R3 assembly guide'.
Have a look at these and their following messages.
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Old 19th January 2013, 01:01 PM   #1148
chiily is offline chiily  United Kingdom
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Nice, you just made my weekend
Thank you for your time and invaluable help
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Old 19th January 2013, 01:16 PM   #1149
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Thank you Frans. This is most useful. I had missed your excellent post on grouding.
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Old 19th January 2013, 01:52 PM   #1150
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Here is Sketch of bus of stars
this is if you use 2 box set up
the input and output cables sockets must be isolated from the enclosure as those are grounded on the PCB

This means that 4 wires came from cartridge and all 4 are isolated from the ground
Attached Files
File Type: pdf Buss of stars.PDF (4.6 KB, 65 views)

Last edited by Bksabath; 19th January 2013 at 01:57 PM.
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