Woot! Got my amplifier PCB's today.

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56W (max RMS) stereo amp. Should be very low loise. It's a simple PCB, but it's my first printed circuit board so I'm pretty excited.

Cell phone included for scale

pcb with phone

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sourapple's picture
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Joined: May 27 2004
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Cool, who did you get it done

Cool, who did you get it done by?

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Advanced Circuits http://w

Advanced Circuits

http://www.4pcb.com

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Nicely drilled...did you do i

Nicely drilled...did you do it?

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Hell no! That's what the fab

Hell no! That's what the fab is for. Sheesh, the drilling alone with worth the fab costs.

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Update: Got all the compnent

Update: Got all the compnents soldered on. Now to finish the power supply and enclosure. I'm also waitin on the heatsinks to come back from the machinist.

pcb assembled

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How many of those boards did

How many of those boards did you have made? Assuming the components are relatively inexpensive, I might be interested in building one of those.

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$$$

how much did one of those bad boys cost? i need somthing alongthose lines made

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The boards themselves cost ab

The boards themselves cost about $40 each, plus about $70 in components. By the time you get the power supply in and the case it's about $200. Though if you cut some corners you can get it down closer to $150.

You can save $25 in parts if you delete the inductors and resistors on the output stage. You can't drive speaker cables more than 10 feet long or drive electrostatic speakers if you do this though. Also, I bought premium magnetics throughout and you could probably get away with cheaper parts in the power supply.

I made 3 boards, once I'm sure it works, I'll release the extras for sale. If there is sufficient interest, I'll order more boards. Above 25 and I can get a significant discount.

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very nice what style amp is

very nice
what style amp is it? cMoy? your own design?

by the way, what happpened to the modded cell phone Wink

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Buy it, use it, break it, fix it, trash it, change it, mail - upgrade it,
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plug it, play it, burn it,

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It's a new type of amp based

It's a new type of amp based on a very old technology.

Basically, it's a power op-amp. Op-amps have been around for decades, but traditionally unable to source very much current. They do provide lots of gain and VERY low noise (at the cost of efficiency). This amp can source large amounts of current at very low noise, but it makes lots of heat too.

Oh the modded cell phone belonged to my employer at the time, and I gave it back when I quit.

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