Freiheit’s Versatile Amplifier Monoblock chassis v 01

Thank you very much for your feedback mbrennwa!


In general, I feel the box is waaay bigger than necessary. Just one side for heatsinking? There are five more sides that could have at least some heatsink.

I see the point about the size now and will think about the design again 🙄. But why would you add more heatsinks to a case that has just a single channel?

I forget to turn off my FirstWatt F5 when I left the house. While it was home alone, the amp developed a 24 VDC output on the speaker terminals, which was heating up the woofers a bit too much. When I got home, the smell in the house was bad. I was lucky there was no fire, so all I had to do was to get some new woofers and a bunch of speaker protection boards for the F5.

Better safe than sorry!
Thank you for sharing. I did not know this could happen. I am glad your home did not catch fire and that noone was hurt.:lifesavr: I will definately install speaker protection then!
 
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Thank you very much for your feedback mbrennwa!




I see the point about the size now and will think about the design again 🙄. But why would you add more heatsinks to a case that has just a single channel?


Thank you for sharing. I did not know this could happen. I am glad your home did not catch fire and that noone was hurt.:lifesavr: I will definately install speaker protection then!

Understand everyone's position, mine is I dont, well havent used speaker protection as of yet. I recently had some boards made from another members gerbers, so that may change.

As of yet I have never had trouble like this....the cautionary tale all seemed to have missed here is: Don't leave home with your Class A (or any amp for that matter) still turned on...😱

Russellc
 
Progress update

Hi everyone,

just to let you know, the amplifier chassis is progressing. Attached are pictures from this weekend, when I drilled 480 holes into the top and bottom plates.

Plenty of aluminium shavings were created as a byproduct of the drilling process. Even tiny shavings are very sharp and cling to clothing and shoes. Drilling aluminium is incredibly dirty.:snooty: 😀

I also had assembled most parts to see whether my drilled wholes were sufficiently accurate. It already resembled a box, although I have not taken pictures.

The next steps will be to drill non-standard holes and openings. Until now I have only drilled M5 and M6 screw holes. Following that, I will have it sandblasted and powder coated at a local workshop.
 

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