Pros:Sits there & does its job unobtrusively; no battery to replace
Cons:Won't bring me beverages while I'm watch movies; does not prevent television macroblocking 100%
The Bottom Line: Helps to deliver fairly constant output voltage, which is why I bought it.
[First update: June 27, 2008]
Recommend this product?
All I can add to my initial review is that this little pup doesn't eliminate macroblocking altogether. But it's less of a factor than before. The variations are most noticeable with the sliding fan switch.
I have a Samsung 30-inch 16:9 high-definition CRT television (model 3092WH, reviewed elsewhere in Electronics), and I noticed that when I switched other devices on the same breaker circuit, it often produced macroblocking onscreen. This was particularly evident with a four-speed ceiling fan controlled by a slide switch.
Despite the otherwise impressive performance of my tv, the muscle of its internal power supply is not above question.
First I tried an in-line battery backup with surge suppression, but that didn't cure the problem. You can buy backups with automatic voltage regulation (AVR), but by then you're into the upper end of widely available backups (say, 80 dollars & up). I didn't need the backup anyhow; I'm not afraid of losing data in my television. I just want glitch-free reception. And with a battery backup, in my experience, eventually the battery wears out & the whole thing shuts down until you replace the battery.
I plugged this thing in, and except for the very weakest of signals (I get all my channels off the air, with an old-fashioned outdoor antenna & a rotor), the macroblocking is gone. For about 40 bucks online (from Provantage, which got it to me within four days), I'm satisfied.
Details: This unit has a white plastic case and four grounded outlets on the rear panel. One of the outlets is spaced to accommodate a transformer block. There's a small slide switch on the back to select 117 volts alternating current input, 120 volts (for the USA--the default position, as it comes from the factory) or 127 volts. On the front, you've got an on/off rocker switch and three LEDs, which indicate the quality of the juice you're tapping into (too high, too low or right on) and the presence of any fault in the circuit you've plugged into.
The thing has slits in the case to cool it; in operation, it feels warm but not hot. You can put it on a carpet floor without any worries because there are no lower vents to block.
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