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From: elliot@alfred.orl.fl.us (Elliot Dierksen)
Newsgroups: comp.sys.att
Subject: Re: ups for 3b1
Summary: I can recommend a UPS
Keywords: ups 3b1 squarewave
Message-ID: <637@alfred.orl.fl.us>
Date: 21 Mar 90 17:28:18 GMT
References: <3005@umbc3.UMBC.EDU>
Organization: Semi-private 3B1 - Orlando, FL
Lines: 28

In article <3005@umbc3.UMBC.EDU>, motteler@umbc3.UMBC.EDU (Howard E. Motteler) writes:
> 
> Does anyone know how the 3b1 power supply holds up when fed the square
> wave output typical of most UPS's?  I know this causes a problem for
> some switching power supplies.

> Any favorite brands?  I see James Electronics is selling a 200w
> "trip-lite" brand UPS for about $240, and for a while, ERAC was
> selling 400 watt Elgars, with "cosmetic defects" for only $180.

I have a UPS for my system which uses a modified sinewave output and it
works just fine. It is American Power Conversion 450AT which has a switching
time of 1 millisecond. It was recommended to me by name from somebody at the
Hotline. He had worked for a VAR that sold 3B1's and they used those with
every system and he said they never had a problem. I got mine from Computer
Discounter's Warehouse. They are listed in Computer Shopper and it was about
$330 for it. 450 watts by the way. Usual disclaimer, I only bought something
from CDW and APC that I like, I have no other connection with either firm.
Hope this helps!!!

EBD


-- 
Elliot Dierksen        "I don't care if my lettuce has DDT on it,
                        as long as it's crisp!!" -- Jorma Kaukonen
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