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Re: [TenTec] DC Power Supply Backup

To: tentec@contesting.com
Subject: Re: [TenTec] DC Power Supply Backup
From: Pete Smith <n4zr@contesting.com>
Reply-to: tentec@contesting.com
Date: Wed, 21 May 2003 14:58:24 -0400
List-post: <mailto:tentec@contesting.com>
At 10:02 AM 5/21/03 -0400, you wrote:
        Has anyone ever done anything like this?  Is it even
necessary or is there enough residual energy in the PS
filter caps that brief interruptions (typically <10 sec) are not
a problem?  I  don't really want to buy a UPS large enough
to power Orion but is there a simpler solution?

I wonder... I think you'd want to be careful about using just any battery, because of possible emission of hydrogen and/or other hazards.

As for the cost of a UPS, I've never had a good answer to this, but have a hunch that the rated capacity of the UPS reflects not the maximum power it can deliver while in line-powered mode, but the length of time that the UPS can deliver its rated power from its battery (for shut-down). Even if the power supply were only 50 percent efficient, it would only draw 750 watts at 25 amps, so if this is correct a relatively small and cheap UPS is all that would be required.


73, Pete N4ZR
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