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Old 2nd February 2012, 02:28 PM   #7191
vgeorge is offline vgeorge  Greece
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If building the mc pre-pre two supplies are required. It never hurts to go with more supplies, but you will be the one to judge if it's worth the effort.
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Old 2nd February 2012, 02:42 PM   #7192
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Can the Pre-pre work well from a regulator for each channel and a single DC source? It's not the ultimate in seperation, but it might be enough to separate the channels. What do you think?
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Old 2nd February 2012, 02:49 PM   #7193
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Originally Posted by Bksabath View Post
Tanks Merlin that is the link I was refering to and the one I used
Just wanted to post the merits where they belong.

I have made a new PCB (the drawing for it as is about 7C in the loft so not going there Today)

Is the almost standard Simplistic board on euro card size.

I have aded same loading for the cart that can be switched off
and few more mosfets at the imput.
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Old 2nd February 2012, 02:51 PM   #7194
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Originally Posted by vdi_nenna View Post
Is it recommended to build a seperate power supply for each channel?
If building the Pre-pre and MC phono, are 4 power supplies recommended?
Yes & Yes
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Old 2nd February 2012, 02:53 PM   #7195
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Quote:
Originally Posted by vdi_nenna View Post
Can the Pre-pre work well from a regulator for each channel and a single DC source? It's not the ultimate in seperation, but it might be enough to separate the channels. What do you think?
Yes can work, but I agree as George better perfomance with two separate PSU.
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Old 2nd February 2012, 02:55 PM   #7196
Salas is offline Salas  Greece
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Quote:
Originally Posted by vdi_nenna View Post
Can the Pre-pre work well from a regulator for each channel and a single DC source? It's not the ultimate in seperation, but it might be enough to separate the channels. What do you think?
All schemes will work. How much ultimate separation and how many PSUs is up to anyone's sense of adventure.
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Old 2nd February 2012, 02:59 PM   #7197
vgeorge is offline vgeorge  Greece
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As I see it, the pre-pre needs about 15v in for it' s own regulator, or 9v if you use another one. What is your raw DC?
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Old 2nd February 2012, 04:31 PM   #7198
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Quote:
What is your raw DC?
None at the moment. I'm just looking for a game plan on how to proceed.
A 15v-0v-15v-0v transformer for each of the Pre-pre's regulators would cover it.
Would use an approriately higher voltage transformer for the MC phono channels.

I'm not crazy about point to point wiring, because so much can go wrong, then finding the problem becomes more difficult. This is why I posed the question as to how many power supplies is enough. Having everything in mono, down to the power cord would be great, but not always possible or worth it.

thanks,

Vince
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Last edited by vdi_nenna; 2nd February 2012 at 04:50 PM.
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Old 2nd February 2012, 04:46 PM   #7199
AndrewT is online now AndrewT  Scotland
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Is for me your post Andrew?
Yes, the post link still takes me to post 7151. There is no pdf in that post.
post7187 downloads a pdf.
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Old 2nd February 2012, 05:50 PM   #7200
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Yes, the post link still takes me to post 7151. There is no pdf in that post.
post7187 downloads a pdf.
I'm sure the link I posted takes me to post 4945 where is the PDF.

If the link at the top of post 7184 not takes you to post 4945, you would learn more how to show links and post pics and etc.

Last edited by merlin el mago; 2nd February 2012 at 06:01 PM.
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