For sale NEC (Japan) NJD-2264A type noisefree high power(4.5KW) switching  DC power supplies.
AC input : 160-230V single phase, or 200V/3 phase.
Output voltage: 22..30V/180A and 5V/25A on case NJD-2264A.
The NJD-2264M gives 48..52V/90A.( 2x outputs serial), and 5V/25A.
Dimensions:415x150x440mm, weight:23.5kg
Full documentation and AC cable is available.
We recommend to high power FET linear amplifiers!
Lot of pieces are available.