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    Power supply for amps

    The c200 is a great design!!! Could you please recommend a way that I can design a pcb for it?
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    Power supply for amps

    I just hooked up my sub to one of my 3886 amps and it played it perfectly!!! But now, I have two transformers that I would really like to use so that I can connect two more amos to it. The one is a 20-0-20 3.2 A per secondary winding. Will I be able to use this one to power the amps just like...
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    Power supply for amps

    Thanks. I was really considering that design, but I can't get double sided PCB's made as of yet. Do you perhaps know of any other amp, even if it is not a 3886 design that will have rms 100W output or more? Thanks a lot for all your input!!!
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    Power supply for amps

    Oh ok. I just blew my velleman amp!! Just couldnt keep up. Now I need to find an amp that preferably uses two 3886's in parallel and that has a single sided pcb design to go with it.  ;) Do you perhaps know of any? I looked at diyAudio, but have not found anything yet.
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    Power supply for amps

    Sorry. I meant to say active car crossover.  :P
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    Power supply for amps

    Ok. Because I forgot to put that in but it still sounds ok. But I'lll have to put it in. Do you think it's wise to buy a active car audio amp, since all my speakers are car speakers anyway?
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    Power supply for amps

    Yeah. I am actually disappointed in velleman for that. I have another question: What is the purpose of the 2R7 resistor and the 100nF cap on the output? Also, what would you recommend I use for a low-pass crossover for a sub? An inductor or a electronic crossover. If an inductor, how do I make...
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    Power supply for amps

    I got a pcb from a site and had it made for very cheap. I actually had two made for R180, which is about $25. You would believe it, I finished the velleman kit, and it sounds pathetic in comparison and it is twice as expensive!!!
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    Power supply for amps

    I would just like to say thanks guys for all your input!! I have built one of the amps so far and it sounds great!!!! I will post some pics when I have completed the whole project, and ahen I get my bro's cam :) Thanks once again!
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    Power supply for amps

    How do I seperate my input ground from my speaker ground? Where do I get ground for my speaker and/or signal? TA.
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    Power supply for amps

    Oh ok. I think that it's my layout that is giving the problems. Do you perhaps know of a pcb layout for this circuit? I really appreciate your input!!!
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    Power supply for amps

    I built the first prototype today and it worked really well! Except, I have a lot of noise as soon as signal is fed into the amp. Can the be because the gain is too high? Or what can I do to remoce the noise? Thanks!
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    Power supply for amps

    Ok. Will this transformer do the trick? 230V to 18-0-18V 2x4.44A 160VA Or must I get another one? Can I still use Rod's design for the LM3886 just as it is with the PSU I mentioned earlier with two 4700uF's and a 400V 35A bridge rectifier? I also have another question about pots. What is the...
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    Power supply for amps

    Oh ok. The closest that i can get to that is a 18-0-18. Will that be ok?
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    Power supply for amps

    Ok. I have another quesiton. You said earlier that I can use a 21-0-21 transformer. This will work perfectly for a 4 ohm load then? How many VA's must the transformer be? I apologise if we are going in circles.  :P
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    Power supply for amps

    Oh ok. I understand. But let me ask this, it might sound very strange: I'm only going to power, or need, 40W rms out of each amp and probably not constantly. Won't that give the transformer a little room to breathe? Or would you recommend that I get another transformer?
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    Power supply for amps

    Ok. But in the LM3886's datasheet it says it puts out 68W on 4 ohms at 28V. Will my IC be damaged if I use the 25-0-25 160VA transformer with two 4700uF caps and a 400V bridge rectifier as in the diagram? I am really confused right now.  ???
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    Power supply for amps

    Thanks once again for all your replies guys!!! I think I have finally decided what I'm gonna do. I am going to build the two velleman kits, and then two LM3886 amps. I am going to go with Rod Elliots design and his power supply. But in his notes he says that his power supply is only good enough...
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    Power supply for amps

    Ok. Thanks for clearing that up for me. Ok then. I will just biuld a amp with a single LM3886 ocnfig and the two velleman kits. I really appreciate all your input Audioguru! You have really helped me a lot! Do you perhaps know of a site where I can get amp schemes that might have 100W amps that...
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    Power supply for amps

    Ok. But I am going to use 4 ohm speakers. I am busy reading through the datasheet.  It's very complicated.    I don't understand. Do I do this modification after the two amps are built as in the shematic I posted? I was looking at figure 3 on page 8 of the application note. They say at +-35V...
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