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Old 4th November 2005, 06:50 AM   #1
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Default Easy to build amp

I just need an easy to build amp. like a really easy to build amp. im not the best at soldering.

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Old 4th November 2005, 07:17 AM   #2
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Soldering knowledge is needed regardless. You will just have to learn how to solder.

If you really want to build an amp without solder, then you can get a breadboard that lets you plug in parts and wires.
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Old 4th November 2005, 12:24 PM   #3
rabbitz is offline rabbitz  Australia
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Have a look in the chip amp forum as it doesn't get any easier. Check out the LM3875 kit here.

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Old 4th November 2005, 12:42 PM   #4
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:nod rabbitz:

Chip amps are easy to build -- you still have the same part as other amps, though, namely the chassis (IMLE).

OP -- if you can't solder, learn. You can't make a decent amp with cold solder joints.

Do daemons dream of electric sleep()?
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Old 4th November 2005, 02:32 PM   #5
hongrn is offline hongrn  United States
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You can do minimal soldering by buying an assembled module from many vendors here. You still have to put the whole amp together though.

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Old 4th November 2005, 03:49 PM   #6
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You son't have ot be the "best" at soldering but you do need ot learn how.

Here's a couple of tips that have worked for me.

Let the iron get completely hot before you start.
Keep the tip clean by wiping it on a damp sponge frequently.
Tin the tip lightly with solder.
I like a pointed tip for getting into tight places.
Use fine gauge solder.
I use a 40 watt iron so I don't have to stay on the part very long.
Make sure you don't move the part while it is cooling.

For amps, you might also want to look at ESP Audio. Rod offers some pretty easy to build amps that sound very good.

Blessings Terry
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Old 4th November 2005, 04:10 PM   #7
SteveA is offline SteveA  United States
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For amps, you might also want to look at ESP Audio. Rod offers some pretty easy to build amps that sound very good
What Terry said. The P3A and P101 are nice amps and easy to build.

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Old 4th November 2005, 06:30 PM   #8
edl is offline edl  Hungary
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Originally posted by SteveA

What Terry said. The P3A and P101 are nice amps and easy to build.


For an absolutely beginner diyer they aren't easy-to-bulid amps!

If I were Turboman I would construct a chip amp with TDA2003, or any similar cheap and small IC.
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Old 4th November 2005, 11:35 PM   #9
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the JLH 10W Class A amp was my first power amplifier. Highly recommended
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Old 12th November 2005, 07:41 AM   #10
CBS240 is offline CBS240  United States
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I call this one the Radio Shack special. Actually, I just created it today. But, it does sound great, with lots of body and has a pretty good PSRR, with virtually no hissssss or ffffttppptptptpptttp. My current job requires me to travel(nothing to do with electronics ) and I was thinking that I would like to have a small 2 X say 25W to take with me because I have all my music on my laptop when I travel and it is just not quite loud enough. However, it must sound acurate at lower volumes and not have parts of PS noise poisoning the delicate small output signal. It also has to crank...realativily. This could drive it 4 Ohms each channel, using 2 PS transformers of course.
So.......it is not too bad for being designed around using the Radio Shack speacial 12.6V_0V_12.6 @2A, 10$ transformer and some 1A diodes, a bridge and some caps you can get at Radio Shack for, belive it or not, reasonable retail prices. Of course some of the devices in this circuit don't come from radio shack. Anyway, it can be made to work on a P-O-S proto-board. The heatsink here is way undersized, but allows me to use it easily in the P_O_S protoboard. Just can't crank but for a short time. This does let me test the thermal compensation though....looks good as long as you don't use bare minimum output bias because the temp. coefficient is just slightly negative. I kind of like this to keep from thermal runaway.
I did notice a small occilation of 5mV P-P of about 2.6MHz, but I think the fact that the circuit has no metal shielding, and is on a P-O-S proto-board, could be the cause of this.

This is basically a common amp AB circuit so no point holding out on everyone.......
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All the trouble I've ever been in started out as fun......
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