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Old 27th November 2008, 06:56 AM   #1
Baka is offline Baka  Montenegro
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Default One transformer with 4 secondaries or two transformers with dual secondaries

I want to build a regulated supply for LM3886 based amp.

Each of two channels should have its own regulators.

From the grounding point of view what is the better approach:
- one transformer with 4 secondaries or
- two transformers (one per channel) with dual secondaries?

Thanks and regards,

Baki
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Old 27th November 2008, 07:24 AM   #2
AndrewT is offline AndrewT  Scotland
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4 secondaries is 4 secondaries. It does not matter how you get there.
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Old 27th November 2008, 12:05 PM   #3
Baka is offline Baka  Montenegro
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Thanks, Andrew.

I'm still in doubt about what to build: two monoblocks or dual mono configuration and what is more easy and sound wise better to implement, if possible.

I am aware of what you have said at this thread - Please help a newbie...

Is it worth an effort to spend an extra money for two transformers, to build two monoblocks, instead of one with for secondaries, for dual mono?

In the case of two monoblocks the approach to grounding should be in the way of total physical separation between them including separate disconnecting network...right? The ground of one monoblock is connected via one signal channel with the ground of the source. Am I right?

Please help.

Thanks, Baki
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Old 27th November 2008, 12:08 PM   #4
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You said:
From the grounding point of view what is the better approach:
- one transformer with 4 secondaries or
- two transformers (one per channel) with dual secondaries?

Go for the:
- two transformers (one per channel) with dual secondaries :-)

Be safe and have fun !!!
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Old 27th November 2008, 03:43 PM   #5
AndrewT is offline AndrewT  Scotland
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from a grounding point of view, it makes no difference as long as the 4winding are isolated from the mains and from each other.
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Old 28th November 2008, 06:39 AM   #6
Baka is offline Baka  Montenegro
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Thanks Andrew and Jacobsen.
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