On Wed, Nov 18, 2015 at 10:08 AM, Rob Salsgiver <rob@nr3o.com> wrote:

Sounds like a good approach. Did some looking - price you've found is 1/2 to 2/3rds of what is being "retailed" as a used unit - so it sounds like a good find wherever you located it.

2 questions:

1) Is this rack or stand-alone?
2) What's our balance / do we need to raise funds?

Cheers,
Rob

-----Original Message-----
From: PSDR [mailto:psdr-bounces@hamwan.org] On Behalf Of Bart Kus
Sent: Tuesday, November 17, 2015 9:57 PM
To: Puget Sound Data Ring
Subject: [HamWAN PSDR] VOTE: $420 for a new Baldi UPS

Hello,

We've known for a few months now that the UPS @ Baldi is bad. It eats batteries at a high rate, so we don't wanna just buy another battery pack for it. We also know that Baldi has many power events, even before this wind storm. One of these outages was of just the right character to deadlock our server up there. We had to physically go on site to reset it. Yes, it locked up the iLO too! Another one of these outages (or surges) caused the death of Baldi-R1's power supply. The site was dead until another physical trip replaced the router and its power supply.

The perfect fit for this problem is something called an On-Line UPS.
Unlike a normal UPS that kicks in when it senses power is down, an On-Line UPS does continuous AC->DC conversion of incoming power to charge the battery bank, and continuous DC->AC conversion from the battery bank to run the load. Any fast events that might confuse a traditional relay-switching UPS, and allow dirty power to get to the load, are eliminated with the On-Line UPS design, because everything hits the battery bank first. These types of UPSes are slightly more expensive than normal UPSes, but I did some digging to find the best deal here.

The physical parts in this spending request are for a Tripp-Lite 2200VA UPS in new condition, a new set of batteries, and a network interface card. I'm hesitant to post links to suppliers since the availability is limited. The cost includes all shipping charges. The real price should be about $408.

--Bart

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