Hi Andreas,

This transformer looks like mine.

Btw, your unit has not been 'upgraded' with the latest steel support for the transformer: if your unit does not 'hum' (low frequency noise) do not worry about this, but if you hear this 'hum' (on speakers, not the unit itself) look around for the 'paper' to see how they have done (just a steel "U" shaped subchasis to mount the transformer perpendicular to the chasis).

Ok, about 115/230V: the plastic wide piece (brown) you see on the right of the transformer in your picture is removable (where the mains cables go in); stretch a bit the (mains) cables insulators so that you can more easily remove this piece.

You will then be looking at the primary connections of your transformer. Unless Meridian surprises us (me) big time, there will be some unused connections, most probably they will look (from up, left to right): first free, following two connected and with one of the mains wires, and last two connected with the other mains wire. You need first to unsolder the mains wires and the two 'bridges', to have all 5 'pins' free.

Ok, you had the primaries in 'parallel' for 115V operation, now you need them 'series' for 230V: mains wire to the right (last one), join (bridge with a piece of cable) the following tow ones, and the other mains cable to the other (the left pin is just for 240V is I understood well my polimeter).

So, counting from left to right, you need to have these connections: free (1), mains (2), bridge (3+4) and mains (5). Now you can install the plastic protector again.

To be extra-safe do it this way: open, unplug the two cables going from the transfomer to the boards, connect with the step-down and measure AC voltages on those two cables. After the change, connect again (with the step-down) and check voltages: they should be half the were. Now plug directly to 230V, and you will read the same voltages as before the change with the step-down.

And you unit is already converted. Sorry for the literature, I have no means here to make a draw and prefer to explain every little step... but this really takes five (maybe six) minutes! Off course 'do it at your responsability etc etc'.

Cheers

Last edited by Josep; 2010-03-26 06:54.
Basement: Linn Sneaky DS, 568.2mm, ARS Sonum Gran Filarmonia, Ramallo Allegro.
Living Room: 602, Linn Akurate DSM, Hypex Nc400, B&W 802D.