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Old 20th January 2012, 10:34 AM   #4621
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The boards are 120 x 210.3 mm each.
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Old 20th January 2012, 10:36 AM   #4622
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X1 class is only needed when the caps are connected to the 230V mains.
They are designed in such a way so they do not burn when overloaded.
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Old 20th January 2012, 11:34 AM   #4623
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OR that shorth circuit does not happens between therminals
Sorry power and motors my bread and butter...

Tanks
As we are using MKP may be then cost efective to stick with same

I am going to use 120 as one off dimentions and see.

Tanks
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Old 20th January 2012, 12:09 PM   #4624
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So we should make a PSU for a turntable motor ?
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Old 20th January 2012, 12:24 PM   #4625
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by Joachim Gerhard View Post
So we should make a PSU for a turntable motor ?
Cool idea
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Old 20th January 2012, 12:52 PM   #4626
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Yea cool idea to but not now I think
just commenting on the use of X1 caps.

Here is my second take on Paradise Preregulator
It needs the TO 220 for the diodes and proper autline for caps of your choice.

Tracks are bit longher than before and I think it may be beter to change again
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File Type: pdf PreRegulatorPCB2.PDF (37.3 KB, 47 views)
File Type: pdf PreRegulator3D2.PDF (39.6 KB, 49 views)
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Old 20th January 2012, 01:15 PM   #4627
RCruz is offline RCruz  Switzerland
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Originally Posted by MiiB View Post
before engaging the servo...I would rough trim the offset by adjusting the current set in either the upper or the lower current mirror, not so much to avoid offset at output, but to ensure that the servo dosen't have to unbalance the currents in the gain-transistors too much
Hi Mibb

I am still collecting parts but this is very important... What is the current mirror you are refering to ?

How can I adjust its current ?

PS: I will start populating tonight
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Old 20th January 2012, 01:29 PM   #4628
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I think Michael suggests that you first build the paradise without connecting the servo.
A certain DC offset will apear over the RIAA. You can then trim the offset down by adjusting one of the 120 Ohm resistors in the upper or lower current mirror. When you reach a minimum you can then connect the servo so it has less to do.
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Old 20th January 2012, 01:31 PM   #4629
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Here is the upper mirror in the input stage. I wold trim R4. It can be that you have to lower or raise the 120 Ohm value.
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File Type: png Paradise upper mirror input stage.png (41.0 KB, 216 views)
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Old 20th January 2012, 01:37 PM   #4630
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Could be paralleled to 1K trimmer in the final PCB?
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