Easy to breadboard at home: Grab a transformer with a 120V and 18V secondary. Feed it with 90 volts AC, it should product somewhere around 16 volts AC on the secondary. Filter and regulate as necesssary.
--- In [email protected], AJ <aj.grant...@...> wrote: > >They've offered to cut in a power inserter at this location > to feed up to 4 amps of 90 VAC to us (roughly 85 VAC at that point in the > plant) - what is out there for a reasonable cost effective solution to > convert this to 12 VDC?

