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Old 8th April 2011, 07:25 AM   #1
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Default Super, basic power supply wiring question

I was thinking of building a DIY amp. I've been reading furiously. I'd particularly like to build Nelson Pass's DeLite or an Hiraga amplifier for their simplicity. For each amp schematic it shows the power supply and 1/2 of the actual amp circuit (one channel). How is the other channel getting powered? Meaning, do I have to recreate the power supply for the other 1/2 of the circuit and use a toroidal with dual secondaries? Or do I parallel off of the power supplies shown to power the other 1/2 of the circuit? If paralleling is the answer, do I have to add more capacitance? Looking at pics of completed amps, there doesn't look like any extra compenents have been added to the power supply portions. Please answer in basic, beginner language. Some of the stuff I've been reading is over my head. But you gotta start somewhere...Hopefully one day, I'll be able to chime in and help another beginner with lessons I've learned along the way.
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Old 8th April 2011, 08:44 AM   #2
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Right. I'll try and keep this simple. As a beginner, you want to look for a project that has the PSU fully documented. I'm not that familiar with either of the two projects you mention, but I would imagine that both show a PSU that is capable of driving two channels, so you would just connect the two amp modules in parallel. However a couple of caveats. Some like to build amps as dual mono, so these would have a completely separate PSU for each amp, good if you can afford it, but not really worth worrying about for a first amp. Secondly, most transformers these days come with split windings, so you will need to know how to configure them for your application. Google Rod Elliot's ESP pages, he has some excellent stuff on PSUs.
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