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Original thread:
Post 11 made on Saturday May 18, 2019 at 14:17
Dundas
Founding Member
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April 2002
309
On May 18, 2019 at 13:19, Ernie Gilman said...
I don't know about such powerbars in particular, but older devices specifically designed to do this usually were not sensitive enough to detect the difference between a line level device (i.e. no power amp inside) being on and being off.

There's very little difference between the amount of current drawn by "vampire power," i.e. the power needed to have the unit in standby, with the IR receiving circuitry powered up, and "ON," where the rest of the circuitry is active. This was especially true with old 480i cable boxes that put out a black video signal when "off."

The ones they have these days are very good and reliable. Some have adjustable sensitivity. I have used them several times (Belkin or BITS brand) with projectors to switch 12V power to supplemental cooling fans in hush box applications.

I doubt anyone would be using a cable box to control power to a system. More likely a receiver or TV.


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