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If you are going for an amp kit and have been looking at Maplins why not check this out:-
http://www.maplin.co.uk/Module.aspx?ModuleNo=10502
By the time you have bought all the bits needed you might just as well go for something like this and you will get more power output.
Just a thought so tell me to shut up if the info is not what you are looking for.
I'm putting a few links for amp kits here - thats the easy way. As far as lm386 based amps and the small cap @ pin 7, it helps to isolate the high-gain stage of the IC from noise from the power supply etc. when the output load is heavy. The "ruby" calls for 100n, but values up to about 4.7uF may work better depending on the power supply used....battery versus wall charger.
Anything taking electrical current and using it to provide "work" is gonna create noise, even on a minute scale like this. Those capacitors, input and at pin 7, try to shed unwanted electrical thuds and thumps to ground where they don't:
a: get amplified into bigger thuds and thumps
b: begin the endless oscillation death-spiral.
Are you using a gain pot or strapping out pins 1 & 8?
If you are going for an amp kit and have been looking at Maplins why not check this out:-
http://www.maplin.co.uk/Module.aspx?ModuleNo=10502
By the time you have bought all the bits needed you might just as well go for something like this and you will get more power output.
Just a thought so tell me to shut up if the info is not what you are looking for.
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