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Old 9th August 2012, 08:39 AM   #931
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Ok, thanks.

But I'm just wondering - will all the values suffice if I put a 300VA transformer for single channel?
Or do I have do change something, since it was designed for one transformer, not a dual mono build?
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Old 9th August 2012, 09:37 AM   #932
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300VA /channel - more than good

C bank ?
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Old 9th August 2012, 09:44 AM   #933
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Quote:
Originally Posted by Tehtoril View Post
Ok, thanks.

But I'm just wondering - will all the values suffice if I put a 300VA transformer for single channel?
Or do I have do change something, since it was designed for one transformer, not a dual mono build?
You do not have to change anything...
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Old 9th August 2012, 09:53 AM   #934
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For a dual mono arrangement, I recommend that each transformer feeds a dual bridge rectifier and that each channel have it's own quite separate Main Audio Ground (MAG).
Then after testing each channel individually, you work out how to connect your two MAGs to the Chassis to make your amplifier user safe.
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Old 9th August 2012, 12:13 PM   #935
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dual mono F5 with dual rectifiers pr ch.
225VA 2*18V pr ch.
PSU PCB's is from chipamp.com
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File Type: jpg DSC00318.JPG (460.3 KB, 166 views)
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Old 9th August 2012, 12:16 PM   #936
AndrewT is offline AndrewT  Scotland
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Audio,
that looks like 4 diodes feeding the cap bank. 4 diodes = 1 bridge rectifier.
Are there 8 diodes in there that I can't see?
Dual rectifier for a dual mono needs 16 diodes, i.e. 4 bridge rectifiers.
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Old 9th August 2012, 12:24 PM   #937
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andrew. the diodes is jumped. i use seperate bridges
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Old 9th August 2012, 12:27 PM   #938
AndrewT is offline AndrewT  Scotland
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Ah, that must be the gaggle of wires going into the hidden gems behind the transformers !

Can you show the grounding schematic for the dual mono? Or is it already posted?
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Old 9th August 2012, 12:35 PM   #939
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thats right the GND from each ch goes to earth thru a CL-60 pr ch.
(don't mind out of phase connection on one of the bridges. this was sorted right after the pic was taken)
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Old 9th August 2012, 12:41 PM   #940
AndrewT is offline AndrewT  Scotland
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What "out of phase" connection?
I can't see it.
Could you explain?
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