No IC, no casing, easy stuff

[00940]

I integrated a Pimeta-inspired amp in my cdp.

Here's what it looks like :

 

[eric343]

What was Rick saying about the "rattle" test awhile back?

Nice mod!

 

[00940]

Rattle ? I wouldn't try to shake that thing

Honnestly, it's more stable than it seems. All is linked by solid wire and isn't very heavy. I'll probably glue the thing when it will have proved it's reliable.

The amp itself is nothing like a revolution. Power supply goes like this : 2x12V / 10VA transformer, diode bridge, 2 *2200uf/rail, then it is split into 2 power rails, one for the amp, one for the buffers, each of the four rail regulated by a lm7812 (or 7912). 3300uf worth of capacitance + some 220nf wima mks in decoupling on each rail. Schematic is straight pimeta. Using opa227 and buf634 (one for ground, 2 per channel). I use the (not very good) pot from the original headamp board. Offset is less than 1mv for both channels. There's still some room on the board to put a crossfeed there.

Not the best amp ever but I needed something to use all the stuff I had lying around (I just had to buy the small velleman PS kit and the regulators, less than 15€).

 

[kevin gilmore]

Gives new meaning to the words open architecture.

 

[rickcr42]

Quote:

What was Rick saying about the "rattle" test awhile back?

shake and bake man !

Heh ,time to get out the silicone cement and the caulking gun !

cool project

 

[Voodoochile]

Finally a use for all that extra space you had in there!

Cool mod... and thanks for the pics. A description just would not cut it in this case.

 

[aos]

That's nothing, it is well organized actually, you should take a look at my point-to-point wiring of the low jitter oscillator in my SACD player. And not even using a low noise regulator. I'm not even certain that this is a better solution than a non-descript quartz that was there before. It wouldn't fail rattle test tough so it must be good

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