kony <spam@spam.com> wrote
> Rod Speed <rod.speed.aaa@gmail.com> wrote
>> kony <spam@spam.com> wrote
>>> Rod Speed <rod.speed.aaa@gmail.com> wrote
>>>> kony <spam@spam.com> wrote
>>>>> Rod Speed <rod.speed.aaa@gmail.com> wrote
>>>>>> kony <spam@spam.com> wrote
>>>>>>> Rod Speed <rod.speed.aaa@gmail.com> wrote
>>>>>>>> kony <spam@spam.com> wrote
>>>>>>>>> Rod Speed <rod.speed.aaa@gmail.com> wrote
>>>>>>>>>> Noozer <dont.spam@me.here> wrote

>>>>>>>>>>> If I have an external phone modem that uses a 1amp 9vDC tranformer,

>>>>>>>>>> That would be unusual.

>>>>>>>>> True, but if it is really 9VDC, next is to determine how much current it
>>>>>>>>> uses (if there's a multimeter handy) or the more conservative (higher)
>>>>>>>>> equipment current rating, or the overly conservative and probably less
>>>>>>>>> useful original PSU (wall wart?) current rating.

>>>>>>>>> I seriously doubt it comes remotely close to 1A,

>>>>>>>> Plenty of mine are of that order.

>>>>>>> The wart might be, but I doubt the modem itself is.

>>>>>> Plenty were, most obviously those that came in an
>>>>>> extruded aluminum sleeve and got quite hot anyway.

>>>>> Quite hot and overheated are not the same thing.

>>>> Never ever said it was. It is a reasonable indication that
>>>> it might well be using something of the order of 9W tho.

>>>>>>> If it used 1A @ 9V, that's of course 9W (practically
>>>>>>> all heat generated internally), and nothing gets that
>>>>>>> hot to the touch or needs significant heatsinking.

>>>>>> Which is why quite a few of them came in an extruded
>>>>>> aluminum sleeve and got quite hot anyway.

>>>>> See above.

>>>> See above.

>>>>> That is no proof of any particular heat density

>>>> It is a reasonable indication that it might well
>>>> be using something of the order of 9W tho.

>>> No,

>> Yep.

>>> given any wart will be conservatively spec'd,

>> By nothing like as much that stupid claim you made
>> about 250mA you just plucked out of your arse.

> Not quite,

Fraid so.

> while I was ignoring any losses from an onboard linear regulation
> stage, it is exceedingly rare for any modem modern enough to
> be worth using today (the old speed issue) to use much power.

You dont even know that HIS modem is one of those.

> Take for example a very common older modem,
> there's nothing in it that consumes much power.

Have fun explaining how come the USR Courier HST has a 800mA plug pack.

> http://69.36.189.159/usr_1034/USR_Sportster_56K_Ext.jpg

> IIRC, these had 12V then later 9V AC @ 1A,

So much for that stupid claim you made about
250mA you just plucked out of your arse.

> and while the case might get warm after it had sat around for
> awhile, this is merely due to having only the minimal (as needed)
> passive cooling, there aren't even any parts 'sunk to the board
> copper with the exception of the LM2940-5.0, 5V linear LDO
> regulator which itself has a 1A max rating...

Irrelevant to that that stupid claim you made
about 250mA you just plucked out of your arse.

> 12VAC in, approx 17VDC after rectified, and dropped
> to 5V. Shedding 12V in itself is the far largest consumer
> of power in this modem, and yet it couldn't possibly be
> using 1A, because it IS IMPOSSIBLE to run one long
> term producing 12W of heat the way it's set up.

Irrelevant to that that stupid claim you made
about 250mA you just plucked out of your arse.

> It's quite possible the OP's modem is not designed quite the
> same, but it's likely it is similar enough except that IF that 9V
> it uses is DC, there is even less loss in the modem, it is an
> even lower power consumer than the example I provided.

Irrelevant to that that stupid claim you made
about 250mA you just plucked out of your arse.

> We can reasonably expect the unknown modem is either
> using significantly less than 1A, probably half that or less,

Very bloody unlikely that anyone would actually be stupid
enough to supply a 1A wall wart with one of those.

> or that it's not a consumer modem and would've had a larger PSU.

Plenty of consumer modems had 1A wall warts, and needed them too.

> There may be an exception, but find one...

You found one yourself.

> I already provided what is likely,

No you didnt. You just plucked more stuff from your arse, as always.

> show one that is unlikely but still possible. I'm not saying
> there isn't one, only that for your argument to be reasonable,
> you would have to know of such a best at that power
> consumption level and with only 1A supply.

Never ever could bullshit its way out of a wet paper bag.

>>> A bet would be silly, measure it.

>> It wont be anything like that stupid claim you made
>> about 250mA you just plucked out of your arse.

> Do feel free to pick a number you like better.

The 1A the wall wart is rated at will do fine thanks.

> Until we have specifics of the model, a schematic, or an actual
> measurement, we can only ballpark and generalize from the info available.

Or we can have enough of a clue to be able to grasp that its
very unlikely indeed that the modem was supplied with a wall
wart of 1A if it didnt need something of that order current wise.

>>> To put it another way, if they provided a 9V, 1A wart
>>> and it was using 1A of power, that alone is a good
>>> reason to stop using it, as it will be getting quite hot
>>> and short lived if in the typical sealed plastic wart case.

>> Stupid to not just replace it with an adequate wall wart.

> You keep forgetting the thread topic...

Nope.

> see the title.

Go and fuck yourself.

> With it internal, powering it from the system PSU can make as much
> sense as stringing the external wart cord from outside to inside the case.

Only a fool would mount an external modem inside a PC.

You qualify.