Building your own amplifier enclosure

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#82
@dennis
@jeff

Thanks for the kind words.

The fabrication part of this hobby is my outlet as a frustrated artist.

It is time consuming, and the set of problems I create for myself can be difficult, but the satisfaction of saying it came from my hands makes it worth it to me.

It takes me quite a long time to finish projects. I sometimes tear them back apart and rework them so I’m satisfied with the functional design and aesthetics.

I’ll take the time to make almost anything.

Here’s a pic of some transformer mounts for the F2J mono blocks I’ve been working on for some time.

Also a pic in situ of that little chip amp I tore apart recently and turned into an integrated amp for a small bedroom system.

P.S. @jeff I wish those F3 boards you helped me out with would fit in the same mono block cases I had already started for the F2J. They are a little too long and require a different solution. I may just pull the heatsinks off the top of the cases with the amp boards and use the cases as separate power supplies when I get to the F3.
 

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#83
chromenuts said:
....

P.S. @jeff I wish those F3 boards you helped me out with would fit in the same mono block cases I had already started for the F2J. They are a little too long and require a different solution. I may just pull the heatsinks off the top of the cases with the amp boards and use the cases as separate power supplies when I get to the F3.
Click to expand...

If you're not in a hurry I'd be happy to modify the board design next time I get bored....
 
#85
JeffYoung said:
If you're not in a hurry I'd be happy to modify the board design next time I get bored....
Click to expand...

Thanks Jeff. That is very kind of you to offer.

A “hurry” is no where to be found in my universe of DIY.

These are very nice boards and I already ordered the needed matching channels. It would be a shame to not use them.

Eventually I am going to need some bigger cases for other amps I’ve collected boards and parts for anyway.

Cheers
 
#86
MagicBus said:
Hi Thimios,
Very nice work! Could you provide more info about that laser lettering?
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I have a friend you help me with this laser engraving machine.Unfortunately this time is fault and i would try to repair it.
Not an easy work at all!
 

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#88
aluminium anodizing in my friends garage

In 2013 my friend and I have anodized parts for several bigger amplifier projects ourself

The pictures show the setup:

  1. acid bath for cleaning
  2. distilled water
  3. anodizing bath
  4. coloring bath
  5. sealing (in boiling destilled water)
The last picture shows the anodizing process of a bigger part. 18V 22A


Have Fun, Toni
 

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#90
jwilhelm said:
If current is too high you will actually strip the anodization coating. 6 amps per square foot is the recommended current. Depending on the size of the tank and the acid mix this could require over 20VDC.
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For some reason i was thinking that anodizing was just another plating process. After a quick read i see its completely different. /facepalm.


"
- Plating is a thin coating of a metal on another metallic substance - such as silver plated copper.


- Anodizing changes the surface of a metal through an electrochemical process without changing the composition of the metal."
 
#91
chromenuts said:
I build all of my project cases from scratch. I do source raw heatsinks for bigger amps.

My formula is pretty much always the same.

I use wooden “cheeks” which are most often Maple. I’ve taken to sheathing the inside with copper.

Everything else is made from scrap aluminum, brass or bronze that I purchase at a metal supplier that has a large “scrap barn” by weight. The more you buy the cheaper the price.

The aluminum is cut as needed with a table saw, jig saw etc.

I have a lathe and mini mill for anything requiring machining.

Everything else is drilled etc. and then wet sanded unidirectionaly in the kitchen sink with a piece of rubber under it to prevent sliding around and scratching.

I’m a minimalist concerning finishing and simply coat everything with a good wax and buff it to a satin finish by hand.
Click to expand...


Outstanding work there. Though you could use a bit of improvement on cutting out square holes. 😉


Getting a nice even surface finish on aluminum can be a real pain. I can't tell you how many times i've had it just about perfect, only to carelessly mark it somehow after wet sanding and lapping a piece on this big glass plate i have with a few different grits of 3m PSA lapping film. It also works amazingly well for sharpening planer blades, chisels, and knives. And it sure beats spending a ton on diamond hones.
 
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