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#19
March 10th 07, 10:51 PM
posted to rec.radio.shortwave
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UPS in series?
"Ron Hardin" wrote in message ... Brenda Ann wrote: You're not going to extend your runtime near as much as you might think. If you had an UPS with a clean enough pseudo-sine waveform to even get the next one in line to power up stably (and you have to get into some very very good ones to do that, they basically have to be generator rated), then you have to deal with the issue of the other UPS'es in the chain not being 100% efficient, so you lose a lot of what you would have gotten from that first unit in the line. This of course follows up the chain. Doesn't the UPS just pass along the input to the output as long as it's ok power? So I don't see the loss. The second UPS just passes along the output of the first UPS. -- Ron Hardin On the internet, nobody knows you're a jerk. Ron, No! There power is checked to be sure it is 60cyc, close to 120 and steadies and it is filtered. Read the papers that came with it. Remember, you get what you pay for. I like "Minuteman". For your radio the way I do it is run them off a 12v car battery with a charger hooded to them. I can "take" the charger off if I hear Norse or just when I am DXing. If the power goes off they will still run for hours if you have a good battery and you can shut down the radios you don't have to have. ALWAYS HAVE A GOOD GROUND ROD GROUND for the radios and antennas! Burr |
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