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Old 16th June 2011, 01:13 AM   #221
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Quote:
Originally Posted by toufu View Post
Does the front end need it's own power supply or can I just use one for everything? Thanks.
You can use one Power supply.
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Old 16th June 2011, 03:19 AM   #222
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One power supply for all...
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and the First Wtt is......a really First Class PSS Idea
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Old 17th June 2011, 07:03 PM   #223
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Cool... thanks guys.
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Old 10th July 2011, 04:31 PM   #224
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Help needed,


When using only the powerstage Like is suggested in the ba1 article. which parts can be removed and which other ajustments have to be made.

Thanks in advance for any help.
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Old 10th July 2011, 04:42 PM   #225
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Here's what the output stage looks like with the front end removed. It
contains the components to bias it.

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File Type: jpg BA1 OS sm.jpg (169.3 KB, 470 views)
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Old 10th July 2011, 06:26 PM   #226
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Thank you so much,

I'm just in te process of designing the layout for two hard wired monoblocks.
Each monoblock will consist of two aluminium profiles mounted to the left and richt side heathsink of a mono chassis. One side will carry the upper halve of the gain stage and the other side will cary the down halve of the gain stage.
This construction will provide me an easy way of trying different desings. or circuit boards.

power supply 1000 va and 300.000 mf per channel.

Hope there will be enough voltage delivered by my Wadia 830..

Thanks you so much again.
René
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Old 13th July 2011, 06:13 AM   #227
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Quote:
power supply 1000 va and 300.000 mf per channel.
With that power, just be sure you put inrush current limiting in front to avoid poping fuses

But I guess you know that already

Hannes
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Old 13th July 2011, 04:39 PM   #228
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You are probably not to good at guessing. :-)
To be honest I did not think about this yet.
Never worked with amps consuming these high currents.
But since you mention I do remember this might become an issue.
Do you know of any simple solution for this?
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Old 14th July 2011, 06:00 AM   #229
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Simplest way is to try the big CL-60 thermistors in series with the primaries.

There are also more complicated ways with soft-start circuits that e.g. bypass a series resistor after a certain time. I like the simple solutions, usually very effective!

Hannes
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Old 14th July 2011, 06:30 AM   #230
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I am glad I SPENT THe few extra bucks to get the transformer with dual 115V primaries now. Do I use the same CL60 thermistor for that? it is a 225VA 12V jobbie for the mini A???
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