hi ya,
i have my ultra-compact high-cap snubberized t-network inverted gainclone
(phew !) in progress. the whole thing measures 105 x 105 x 165 mm (~4,1 x 4,1 x 6,5 "). one decision is left to make:
the halfs of the alumimum box shown are to be put together open side to open side and fixed with screws on front and back panel.
what would you prefer: trafo just above the chip and shielding both trafo and chip with and / or copper sheet and the magnetic stuff on the right (salvaged from a dead computer monitor)? wiring from rectifiers to psu would be 60 mm (~2,4").
or should i turn the right half so that the trafo is above the capacitors and the cabling from rectifiers to psu is 220 mm (~8,7") ?
i´m not shure if there is any drawback in the quite long cabling, but otherwise i think the inductivity shouldn´t affect as it would be before the caps. i dislike the idea of having the trafo directly above the chip ...
i have my ultra-compact high-cap snubberized t-network inverted gainclone

the halfs of the alumimum box shown are to be put together open side to open side and fixed with screws on front and back panel.
what would you prefer: trafo just above the chip and shielding both trafo and chip with and / or copper sheet and the magnetic stuff on the right (salvaged from a dead computer monitor)? wiring from rectifiers to psu would be 60 mm (~2,4").
or should i turn the right half so that the trafo is above the capacitors and the cabling from rectifiers to psu is 220 mm (~8,7") ?
i´m not shure if there is any drawback in the quite long cabling, but otherwise i think the inductivity shouldn´t affect as it would be before the caps. i dislike the idea of having the trafo directly above the chip ...
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I built a similar amp into the same chassis and had the same issue, i solved it by putting a 6mm thick peice of copper plate inside the housng to divide it into two boxes. This worked pefectly and even though my lm3886 is only maybe 4-6cm above the tranny i have no humm what so ever. 
fil
fil
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