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Registered Member #1321
Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
I'm looking for a cheap "linear" audio amplifier capable of at least 50 watts (preferably more than that) of continuous power output. I want it to be dc coupled with a useful freq. response from dc to about 50 kHz.
I see some kits and assembled boards on ebay, based on the LM3886 and also on the LME49810:
Unfortunately though, being of Chinese origin, it seems there is little or no documentation available (as would be expected)...so I'm wondering, does anyone have one of these things? And if so how's the construction, and how does it work?
Registered Member #1321
Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
I asked about 5 or 6 different ebay sellers if they had schematics and/or detailed specifications for the stuff they're selling...and they don't. All they have is a "picture". It's frustrating.
One seller did have an almost illegible schematic for a dual (parallel) LM3886 board, and it seems it must've had problems with stability or noise or something, as it looks like there are capacitors all over the place.
I suppose the prices are cheap enough that I could just buy one and then try to modify it if I don't like it...
Registered Member #1321
Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
I'm thinking about buying this one:
The only thing is the seller doesn't have a heatsink for it. I suppose I could buy an extrusion and drill some holes in it, but I'm getting lazy...I just want to buy it and use it.
I also found the following, which is more like what I initially had in mind, but I don't know anything about the seller, and the item is supposedly out of stock:
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Anybody have any of the relatively cheap class AB audio amplifiers/kits available on ebay?
