[Elecraft] K3S and power failure

[Bill Johnson]

Ditto,  I have had my system in place for at least 10 years. I bought a deep cycle marine cell which can recover with extreme discharge cycles.  I have had it last as backup from a mains power outage for 30 hours, using the K3s briefly for a couple of hours at 50 watts.  Would never had known power was out.  The PC backup didn't last as long, didn't matter as the ISP failed within hours anyway.  

73,
Bill
K9YEQ

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of Phil Kane
Sent: Wednesday, July 18, 2018 2:07 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3S and power failure

On 7/17/2018 6:46 PM, Bob Novas wrote:

> What would be nice would be a small battery that powered the smarts 
> independently of the mains supply.  Bob - W3DK

What I have is a 12V DC battery bank (150 AH) feeding all my radio equipment - transceivers, scanners, processors), a 1500 VA UPS for the desktop computer and printer, and a 500 VA UPS for the phones and digital distribution system.  The charger for the battery system (which can handle full load if the batteries fail) and the laptop supply are fed off the mains.  That system can and has powered the radio room for several hours with less than 1 volt drop in the nominal 12-volt system.

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402

>From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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