Noisy UPS

I've just acquired an older 1.4 kVa BEST Micro Ferrups UPS, the one
with the huge and heavy ferro-resonant transformer.

I changed the battery, plugged it in, and it works great. Runtime is
excellent for home use. Just one thing though: It hums and buzzes
like an old neon sign ballast. Almost unbearable. I may not be able
to use it for home because of the noise. It's quite a buzz.

Is there anything I can do to eliminate or minimize this noise?

 

[als]

Check the cap to the transformer. Make sure that all bolts are VERY
tight. The only time you should hear anything is possibly when the
UPS inverter is running (i.e., no A.C. input), and then not much.
I have a dozen of these things (1's, 1.4's, 1.5's, and some 5 kva)
here, and they are all silent, except for the fan(s).
<als>


In article <1121904677.130547.55990@z14g2000cwz.googlegroups.com>, giroup01@videotron.ca says...

I've just acquired an older 1.4 kVa BEST Micro Ferrups UPS, the one
with the huge and heavy ferro-resonant transformer.

I changed the battery, plugged it in, and it works great. Runtime is
excellent for home use. Just one thing though: It hums and buzzes
like an old neon sign ballast. Almost unbearable. I may not be able
to use it for home because of the noise. It's quite a buzz.

Is there anything I can do to eliminate or minimize this noise?

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