[vcf-midatlantic] UPS (Uninterruptible Power Supplies) was: How's Everyone Doing
hjohnson at retrotechnology.info
Fri Apr 24 23:53:38 EDT 2020
I'm surprised by all the interest in UPS's. I have generations of them,
myself, in the few to several hundred watt range. Every digital device
in my home has a small UPS on it, always has. Just makes sense. When I
get a power hit, the birdies sing from each one.
The older household buy-at-Staples ones work fairly well, when batteries
are replaced every handful of years. They appear at thrift stores for
several dollars; the salvage value of the gells is about a few dollars.
Avoid the very smallest units, only buy units that take standard sized
cells. Funny, some units WILL take standard sized cells, if you chop out
the ribs molded into them, that hold SMALLER batteries - so they can
sell them cheaper. That's my kind of 'creative destruction'.
I have some old 1990's APC rack-mounters that I haven't populated in
several years, 3000 watt. And some other floor models in the few
thousand watt range, which need those larger 17VA batteries, not the
several VA 12V common sized gell-cell units.
I just scrapped two giant UPS's, 3-phase units, that took four car
battery sized lead-acid cells. They also went back to the 1990's. Wiser
heads told me "those are too old and inefficient for today's use". The
steel went on the curb and disappeared. Anyone need 60 Hertz
ferro-resonant chokes and transformers? Hey, I can use them for exercise
equipment - if I don't mind losing a toe if I drop one! ;)
If interest persists to when we get together again, I'll bring some
around for purchase. Batteries not included.
Regards, Herb "Amps" Johnson
PS: does this still count for "how's everyone doing"? Do we all run on
batteries now, or what? ;)
Herbert R. Johnson, New Jersey in the USA
http://www.retrotechnology.com OR .net
preserve, recover, restore 1970's computing
email: hjohnson AT retrotechnology DOT com
or try later herbjohnson AT retrotechnology DOT info
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