"DoN. Nichols" wrote in message
...
On 2017-03-22, George wrote:
...
...I have a rotary converter which takes in 28
VDC at perhaps 20 Amps or more, and produces the 115 V 400 Hz 3
phase.
It also produces more audio noise than I like. :-)
...
DoN.

You need an R-2800 to mask the converter's noise.

-jsw