ozshadow
500+ Head-Fier
- Joined
- Apr 29, 2006
- Posts
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I picked up a etching kit at a RS that was closing the other day for $4. I figured I would give it a try. It was a lot more work than protoboard, but a much cleaner result.
The amp is an A47 design running on 27 volts with two OPA2107 chips in it, and two 1000uf caps. It uses resistors to split the rails, as I had no railsplitter on hand, but I intend to build one of those soon with a different, smaller two sided design.
The amp sounds great. It has improved detail and soundstage over a similar cmoy, and the bass is tighter. I gutted a cmoy from that case, as I finally had something big enough to fill it. There is no noise to it whatsoever.
It must sound good, because my fiance stole it and has been listening to it ever since like, 3 minutes after I confirmed it was done.
Below is the initial transfer from a transparency.
Next, we have it with the copper removed.
And here it is with the copper cleaned off and the holes drilled - I could not find a 1/32 bit, so I had to use a 1/16, which required some creative soldering and hole placement.
Below, you see all the components added
The bottom, sorry its so fuzzy, but its already in the case, so no new pic, but let me tell you, there is some very precise soldering under the opamp sockets.
And finally, here it is COMPLETE and working ! It has a cool purple-blue light by the way, to match the midnight blue case.
I am very pleased with the way it turned out.
The amp is an A47 design running on 27 volts with two OPA2107 chips in it, and two 1000uf caps. It uses resistors to split the rails, as I had no railsplitter on hand, but I intend to build one of those soon with a different, smaller two sided design.
The amp sounds great. It has improved detail and soundstage over a similar cmoy, and the bass is tighter. I gutted a cmoy from that case, as I finally had something big enough to fill it. There is no noise to it whatsoever.
It must sound good, because my fiance stole it and has been listening to it ever since like, 3 minutes after I confirmed it was done.
Below is the initial transfer from a transparency.
Next, we have it with the copper removed.
And here it is with the copper cleaned off and the holes drilled - I could not find a 1/32 bit, so I had to use a 1/16, which required some creative soldering and hole placement.
Below, you see all the components added
The bottom, sorry its so fuzzy, but its already in the case, so no new pic, but let me tell you, there is some very precise soldering under the opamp sockets.
And finally, here it is COMPLETE and working ! It has a cool purple-blue light by the way, to match the midnight blue case.
I am very pleased with the way it turned out.