-------- In message <1444483218108.6a07c91c@Nodemailer>, "Chris Waldrup" writes:
>Has anyone had bad experience noise wise with the APC brand units >like are available on Amazon and at Staples? I'd like to get one >that doesn't generate lots of RFI. Thank you. Then don't. Instead get 12 or 24 Volt sealed lead-acid batteries and a good float-charger, and run your stuff from that. You avoid a lot of conversion losses, and you get to decide what quality batteries you want (As opposed to "the cheapest we can get away with") and you get to decide how long hold-up time you want. The important tricks are: 1. ATO Fuse *RIGHT NEXT TO THE BATTERY*. Not a meter away, but quite literally bolted right onto the terminal. 2. Don't buy a shit charger, it will cost you battery life. 3. Suitably sized fuse/polyfuses on all loads. 4. Either put 0.010 Ohm current shunts in all over the place or buy a 1mA resolution clamp meter and prepare the wiring for measurement. And that's it really... I run all the always-on stuff in my lab from two 12V/105Ah telco-grade sealed lead-acid batteries, and I'll never look back. Presenty the load is 6.7A @ 24V, and that powers my ADSL lines, firewalls (soekris), home server (ITX with mini-box.com PSU), emergency lights (LED strips), GPS, GPSDO, HP5065 etc. etc. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.