I'm building an Aikido all-in-one line stage. The case design I'm planning will hang the PCB from a metal top panel, with the tubes extending up through the case top, and the larger capacitors mounted downward. The power supply is on the same board as the audio circuit, mounted at the back. I'm using two toroidal transformers, a 12v for the heater supply and a 230v for the B+. I've ordered some iron pots for them, but I'm also considering mounting them naked, or building a custom metal enclosure/baffle.
What I'm trying to decide now is where to place the transformers for minimal interference with the audio circuit. The attached rough sketch shows the three locations I'm considering. Option B, nested under the PCB, would allow me to shorten the case, but would place the transformers closest to the circuits. Option A provides the most shielding and separation between the circuit and the transformer, since it would be entirely outside the case and shielded on all sides.
What I'm trying to decide now is where to place the transformers for minimal interference with the audio circuit. The attached rough sketch shows the three locations I'm considering. Option B, nested under the PCB, would allow me to shorten the case, but would place the transformers closest to the circuits. Option A provides the most shielding and separation between the circuit and the transformer, since it would be entirely outside the case and shielded on all sides.
