[time-nuts] The home time-lab
phk at phk.freebsd.dk
Fri Jul 8 02:52:27 EDT 2016
In message <20160708041855.562D7406061 at ip-64-139-1-69.sjc.megapath.net>, Hal Mu
>bob at evoria.net said:
>> So, since I need to power the 5370 (preferably both)
I've been staring at the 5370 PSU many times, it is a horribly inefficient
The 5V rails are regulated down from 10V, the 15V rails down from
20V, so somewhere between 25% and 50% of the power becomes heat in
the series transistors.
A new A6 with four high quality DC/DC converters and some extra
filtering would be a really big improvement both heat and efficiency
It would be trivial to make such a design able to run from a 24V
Battery supply input as well
I havn't tried to measure the power-drain on the four regulated
rails, but from the short-circuit resistors it looks like less
than two amps on +/-15V and less than 10 amp on +/-5V ones.
>Yes, you can build your own UPS. It would be interesting to see what the
>parts cost totals out to.
Taking the detour around mains is a bad idea, everybody who can are
moving away from it.
>What did you have in mind for a power line monitor?
Plenty of high quality professional ones on eBay
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
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