Re: HDTV phantom power drain

On Sat, 10 May 2008 06:47:14 +0000 (UTC), nospam@[EMAIL PROTECTED]
 (Alan)
wrote:

>In article
<ae8cf074-7961-427a-9168-c5b1ab8de2df@[EMAIL PROTECTED]
>
G-squared <stratus46@[EMAIL PROTECTED]
> writes:
>> On May 7, 8:37=A0am, Steve Urbach <dragonsc...@[EMAIL PROTECTED]
>
>>wrote:
>> > That is 24 watt hours EACH or a roughly a KWH every 40 days. NB
>> > Really cheap
>> > ones (containing cheap Iron transformers) idle at 3 to 5 Watts.
>>
>>I have my doubts about 3-5 watts. That 'much' power in a small box
>>such as the wall wart would get pretty hot. Check the heat from a 4
>>watt night light.
>
>  Indeed.  If they consume that power, they would be giving off heat.
>
And you just *might* have a problem holding them firmly  in your hand:
Yow!
I did say "cheap" ones. BTW if you have a scope, the DC output waveform is
/interesting/ (yes, waveform: as in really odd ripple with little load)
Go put you hand on your furnace 24VAC transformer (might be inside a
panel),
Warm to Hot even when *NO* heat or A/C has been used in recent time.
Doorbell xfmr HOT
Note these transformers do not usually have plastic insulating covers and
are
in relatively free air.




>  I suspect many of the folks who make these claims do not understand
>power factor, and think that VA is the same as Watts (which is not true).
>
>	Alan