View Single Post
  #5   Report Post  
Posted to sci.electronics.repair
AZ Nomad[_2_] AZ Nomad[_2_] is offline
external usenet poster
 
Posts: 944
Default Kill-a-Watt surprises

On Mon, 2 Nov 2009 10:06:26 -0800, William Sommerwerck wrote:
Most of the vampire devices are items I don't use regularly.
I'm going to move them to their own strip, so that they will
always be off, except when actually being used.


You can get an idea just from the temperature of the device when
it is on standby. Cold devices can be ignored. I've found the worst
offender in all my AV equipment is the cable box.


The Parasound was always slightly warm, despite its size, so the power it
pulled was not surprising. But a unit with a "compact" power supply might be
warmer -- in that area -- than a unit that pulls more power, but whose
supply uses a bigger transformer or is further from the cabinet's cover.


A device that pulls a lot of power won't just have a hot transformer.
It'll have a number of VLSI chips all gettng rather warm heating the
entire cabinet. The difference between a component pulling 5W and
one pulling 60W isn't subtle.