[Milsurplus] rotary inverter

[Richard Brunner]

 Re:
800 cycle motor-generator type 800 and 800-1 .... This inverter works very 
well, but is a screamer guaranteed to disturb the neighbors.

Dave wrote:
> I've never looked at one of these.  Is the screamer the cooling fan on the 
> end and, if so, is there an alternative?

It's probably a combination of fan, windage, and commutator noise, and is 
really bad.  The solution is to build a sound-muffling box around it, or use 
a solid-state inverter.  Wait a minute! I also have a 400 cycle solid-state 
inverter, and it sings too, but not as loud.  Also its cooling fan sounds 
like a tornado when it fires up.  Always problems...

Richard Brunner, AA1P