Thank Mr. Bean
, it seem that the one that Dave dissected it's SMPS and (I hope) the DPD it's linear.
Anyway the DPD-3030 thread seem to be what I need, did you ever installed the multi-turn pots and output switches in the end ?
To me, right now the biggest drawback it's the single turn poti, 60V divided 270 degrees it's not too much precision
.
But if the multi-turns works OK, then it's perfect, they're usually much more stable than the carbon ones.
Any chance of a schematic somewhere ?
Thanks and cheers,
DC1MC