| jimbo1968 |
I've got 3 kits on the way (lm3875, lm3886, lm4780) to be used eventually as the amps for 3-way active front speakers (once i've worked out the system configuration).
To start I will build them as straightforward stereo amps, with attenuation, to allow comparison, trial of different attenuators etc.
Here are some pictures of my layout scheme for comment.
I've bought a sheet of 10mm aluminium, and have access to a milling machine and a sheet bending machine and plenty of thin stainless sheet.
3 amps: |
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| jimbo1968 |
| inside side view |
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| jimbo1968 |
| Top view, and inside view with lid/base removed |
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| jimbo1968 |
The idea is to have separate power and amp compartments.
Lid and base will be removable to allow assembly/modifiaction of the 2 section.
The lid/base will be sheet metal bent into a simple C shape, the chassis will be held together by M4 socket screws in counterbored holes. The dividing middle 'floor' will be fixed from the inside.
The front/rear panel will be milled down where necessary for fixing of sockets.
10mm Al sides for heat sinking, and a width of 140mm were the design drivers. |
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| steenoe |
Looks promising, indeed. Very nice drawings you made there:)
Steen:cool: |
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| jimbo1968 |
| Thanks. If I had autocad I'd do some proper drawings, but for now Powerpoint is my design tool:rolleyes: |
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| Nuuk |
| quote: | | for 3-way active front speakers (once i've worked out the system configuration). |
Jimbo, you may find this gives you some ideas! ;) |
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| daatkins |
Nice work Jimbo!
I'm after some sheet aluminium for an 8-channel LM3886 gainclone. Where did you buy yours? |
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| jimbo1968 |
http://www.metalfast.co.uk/ would have cost about 60quid for 1200mm x300mm x10 inc vat and 15quid delivery. I got mine via my brothers company for the same price.
Once again I was tempted to buy in bulk 'just in case' because of the delivery charges, so I nearly bought sheets of 8mm and 6mm as well. |
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