[R-390] Commercial 400hz converters

[Michael Murphy]

Terry,

I obtained a laboratory AC power source this year and have not fired it up
yet. It is a Kepco model 200 which is a rack mount unit. It has an
oscillator module which is directly adjustable to 400 Hz. It can generate a
120 VAC sine wave at 30 to 1000 Hz at several hundred Watts with essentially
zero noise. Unfortunately it is a single phase unit. These types of units
can be had cheaply surplus from test equipment houses and they sometimes
show up at ham flea markets.

At work we rent gear sometimes. We may pay $1000 - 3000 a month rental for a
special piece of microwave or cellular gear, but when we needed one of these
for 220 VAC 50 Hz testing, it only cost us $100 per month to rent.

Other AC power supply companies are California Instruments and Elgar.
Here is an example:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3833622791&category=50968

Mike WB2UID


----- Original Message -----
From: "Terry O'Laughlin" <terryo at wort-fm.terracom.net>
To: <R-390 at mailman.qth.net>
Sent: Saturday, August 14, 2004 9:31 AM
Subject: [R-390] Commercial 400hz converters


> At my college, we have a Kepco power supply donated by a local
> company.  Takes in 220 VAC single phase 60 Hz and puts out 0-220 VAC @
> 20-1000 Hz, controlled by keypad and microprocessor.  We primarily use it
> for testing at 50 Hz (Japanese electronics) but you could even power old
> blimp radios at 800 Hz.
>
> Very slick unit.  I can get the model number on Monday if you'd like to
> know more.
>
> Best,
> Terry O'
>
>
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