[OT] measuring DC wall wart

From: Tothwolf <tothwolf_at_concentric.net>
Date: Fri Jun 7 16:31:51 2002

On Fri, 7 Jun 2002, r. 'bear' stricklin wrote:
> On Fri, 7 Jun 2002, Chris wrote:
>
> > I think I am going to dig out the modem it goes to, and test the voltage
> > with it hooked to that. That will at least give it real use load (the
> > modem powers up just fine, it just fails to respond to all AT commands
> > except for getting the firmware, and it won't attempt to go off hook or
> > dial... I'm not 100% convinced the modem is really "dead" so much as it
> > just doesn't want to co-operate).
>
> Hey, you know what? I missed the beginning of this thread, but this is
> exactly the sort of behavior you get from a modem which requires a 9V
> AC power supply, when you run it with a 9V _DC_ supply.

I can certainly agree with that. I've seen it happen several times. Most
all the modems I have around here use 9V AC wall-warts too. Some use DC or
exotic voltages, but 9V AC seems to be the norm.

-Toth
Received on Fri Jun 07 2002 - 16:31:51 BST

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