I am looking at this for a power amplifier power supply:
High current dual rail regulator kit for power amplifier or bench power supply ! | eBay
The only thing it seems to be lacking is some feedback to reduce noise.
Anybody got something better?
High current dual rail regulator kit for power amplifier or bench power supply ! | eBay
The only thing it seems to be lacking is some feedback to reduce noise.
Anybody got something better?
Yeah, I guess they do. I was thinking more of an opamp-type feedback, with gain, like this one: LM317 / LM337 +/-1.5V~37V Adjustable Dual Voltage Regulator Power Board | eBay
But with the pass transistors to handle more current.
the 3pin regulators are opamps tailored to give an output that is defined by the feedback arrangement.
Have a look at the datasheet simplified schematic to see just how complicated it must be.
It's that complication that increases the risk of instability and why the Builder MUST follow the esr recommendations in the datasheets.
Have a look at the datasheet simplified schematic to see just how complicated it must be.
It's that complication that increases the risk of instability and why the Builder MUST follow the esr recommendations in the datasheets.
Hmmmm....I am looking at the T.I. LM317 datasheet, and I do NOT see any ESR recommendations per se. The applications schematics show a 1uF cap on the output for low-current, and a 47uF cap for the high-current use. Did I miss something?
Buying a kit or PCB can save a lot of time. Particularly if you are more interested in the audio amp than the PSU.
Whether it's a 'good' psu might depend what you want.
The ideal PSU might be designed with output protection in mind?
It comes down to what you want from 'DIYing your Audio.
Circuit-wise it looks sound enough. A good, conventional approach?
Whether it's a 'good' psu might depend what you want.
The ideal PSU might be designed with output protection in mind?
It comes down to what you want from 'DIYing your Audio.
Circuit-wise it looks sound enough. A good, conventional approach?
Yeah, but the board by itself is only $13 less than the kit with parts (filter caps and pass transistors not included)
I remember when I bought kits from eBay I always ended up replacing all the components or at least most of them And I bet that 13$ difference will actually cover at least 75% of how much you would spend on the components from mouser .
But I guess not all the kits have the same cheap Chinese eBay standard, but if you want go ahead and buy it , I would not buy the kit.
But I guess not all the kits have the same cheap Chinese eBay standard, but if you want go ahead and buy it , I would not buy the kit.
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