[Milsurplus] Variable Hertz AC Supply--Used For What?

[gl4d21a at juno.com]

Don:

It is a piece of laboratory test equipment used in testing power supplies which have to work from more than one standard input frequency.  If you design a piece of equipment and specify that it works from any power source in the 50 - 400 Hz range, it better not blow up at, say 280 Hz, as some user is likely to want to operate it from some odd generator which runs at that frequency.

At one time, HP and many other manufacturers of lab equipment specified most of it it would work from 50 to 400 Hz power sources.  I *think* most computer power supplies are so rated also.

HTH, & 73
George
W5VPQ

---------- Original Message ----------
From: Don Merz <n3rht at yahoo.com>
To: milsurplus at mailman.qth.net
Subject: [Milsurplus] Variable Hertz AC Supply--Used For What?
Date: Fri, 7 May 2010 12:04:39 -0700 (PDT)

What good is this thing? It's an AC supply--looks to be in the 4-5 amp range made by Pacific Electronic Enterprises as their model PD-250D AC Power Source. Voltage seems to be variable from 0-150VAC and frequency is variable from about 40hz to 500Hz. Metered. Solid construction. Solid State. 

Whyforisthis? I was thinking that maybe it could be used to power 400hz aircraft dynamotors. But surely their startup current would crush this thing?

Any ideas? I just want to sell it but I am not sure who would be interested in it!

73, Don Merz, n3RHT

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