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Old 16th February 2007, 09:03 AM   #1
elrocco is offline elrocco  United States
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Default Help?

i need help understanding this schematic
http://europa.spaceports.com/~fishbake/amp/a100.jpg

im kinda new to electronics, i usually build simple stuff but this kinda is over my head can anyone help me out?
I think i can do this if I had a list of part's... thats the main problem i had.
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Old 16th February 2007, 09:12 AM   #2
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Help is a pretty vague title for a post

The parts are actually written on the image - TIP41, 142 and 147 are transistors as are the 2x 2a258. You'll probably want some BIT heatsinks for those transistors.

You've got 2x 1n4007 diodes.

A hand full of resistors of differing wattage ratings and a few caps.

And a +45v and -45v feed (which would be rectified from a transformer with 32VAC secondaries).
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Old 16th February 2007, 07:14 PM   #3
AndrewT is offline AndrewT  Scotland
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Hi,
I would say forget it.

If you want an intro to power amps then download some of BrianGT (or similar) chipamp schematics. Then build from there.
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Old 17th February 2007, 01:52 AM   #4
CarlosT is offline CarlosT  United States
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I like that..."this was handed down from a friendof a friend"

I gotta go with AndrewT on this one...any good chipamp kit will prolly be much more rewarding and you'll learn a lot more.
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Old 17th February 2007, 07:40 AM   #5
elrocco is offline elrocco  United States
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Thanks for the help, but I really didn't make much sense. I meant what are equivalents to the TIP 142, 157, and 41 as I cannot find these components at any radio shack or hobbies store.
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Old 17th February 2007, 10:15 AM   #6
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Digikey seems to list them

But as the other posters have said - there are probably more modern and just as simple amps available.
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Old 17th February 2007, 08:33 PM   #7
elrocco is offline elrocco  United States
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Ok, what would be a good place to find a schematic for one of them?
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Old 17th February 2007, 09:00 PM   #8
AndrewT is offline AndrewT  Scotland
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Hi,
I just did a search in chipamps for schematic and it came back with over 1300 threads.
If only 10% have a schematic posted then you have a choice of 130 schematics to choose from.
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Old 17th February 2007, 09:18 PM   #9
elrocco is offline elrocco  United States
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ok thanks, all I'm looking for is a 12 volt chipamp schematic?
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