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| Reviews Summary for Sima STP-325 325 watt Power Inverter |
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Reviews: 1
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Average rating: 4.0/5
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MSRP: $59.99
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Description: Smooth start technology to smoothly bring up the AC power helps protect the unit plugged into the inverter and the inverter
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More info: http://
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write your own review of the Sima STP-325 325 watt Power Inverter.
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KE3Y
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Rating: 4/5
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May 7, 2007 20:31
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Versatile, fan can be made cyclic with work
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Time owned: more than 12 months
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Easily handles a computer, monitor, and several ham radio accessories. No RF noise is generated while idling or in use. The fan runs continuously and the noise is unpleasantly noticable, as with most of these things. The load may be grounded. Compare my review of the Xantrex Xpower 700 Plus. Currently available at Amazon.com.
For modifying the inverter fan to run intermittently, there is a temperature-dependent voltage at a transistor collector nearest the on-board Sonalert. (7V Cool; 4.5V Sonalert alarm; 4.2V is shutoff.) I use a complicated 3-IC circuit with a 555 driving the fan. The fan runs rarely with a small (~100W) load. You could try mounting on the heat sink a snap thermostat in series with the fan, like the Stancor Disc Thermostat that closes between 113 and 127 degrees F. and open when it cools 10 degrees (Mouser # 802-STC-120). However I suspect a lower and tighter range might be needed.
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