Dude, chill, long life is rare ... i know everyone can do what he wants, don't need bold colored text to prove your free will (And definitely not PM lol?). I was asking some logical explanation like ... components will be owerpowered and will fry in time or something like that ... I rather ask before i blow something up. Whatever. Have a nice day.
Im am Cool
you?
just wanted to give you some info.
"owerpowered and will fry in time or something like that ... I rather ask before i blow something up"
ok...These are Just a >few Examples<
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=53296&start=150
if you look at the PDF's the "components" can do alot more and still within Spec.
Asking is one thing but How you Ask is another.
Recap: Antenna
Fact:
Preformance depends on the "antenna efficiency" and the antenna and that is in use and the VSWR of the Antenna and the Receiver sensitivity.
if you got a antenna with Good efficiency and a Good SWR a 3% increase in power you will see a inprovement. in (ERP).
it looks like this
************* Example ****************************
Actual Transmitter Power Output = 0.03 dbw
Antenna Gain = 7 dbi
will give you
Effective Radiated Power (ERP)
4.8815615195230215dbw = 3.0772Watts
Or rounded we got
4.882dbw = 3.077Watts
now we got
Effective Isotropic Radiated Power (EIRP)
7.03dbw = 5.04661Watts
Round that off to
7.030dbw = 5.047Watts
all that to say if you got a 7dbi antenna with a SWR of 1.1 to 1
with 0.03 dbw in your Effective Out put will be 5.047 Watts out.
Recap:Linksys Power supply
I dont know why but linksys looks like thay like Starving ther Wireless Routers and Ap's of POWER.
thay supply you with a 1 to 1.5 amp "Wallwart" Powersupply way under what you need .
just look a the Product spec sheet lets say just for a wpc300n PCMCIA WiFi card.
JUST the Card.
Power Consumption
TX: <900mA (Maximum)
RX: <700mA (Maximum)
http://downloads.linksysbycisco.com/downloads/WPC300N_ds,0.pdf
and the Ram Power Consumption is well im not shure what the ram power Consumption is .
Plus Remember the +/- % that is NEEDED Normaly 5% to 10%
And you shuld have a power supply that has a power rating of At least 5% Over what you need to keep things cool.
Recap:
Antenna diversity :
if you have 2 Antennas
Don't Use auto for Tx and Rx antenna use 1 for Rx and 1 for Tx .
Why?
1 well when its in "Auto" mode you will have switching noise .
2 and Timeing between antennas Rx ant Tx
think of it like this if it is set to "auto".
If antenna 1 is in Rx and #2 is in Tx when thay switch you have one point in time when you Dont have a Rx antenna Or a Tx antenna or you will have 2 Tx antennas or 2 Rx antennas .
yes i know the time is VERRY short like in Micro Seconnds but it is a fact. _________________ You can find me Here:
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I saw some other members stating that the factory wall wart (1A) is weak for thiese routers and they are using 5A ones.
Ok let's say it's true but from 1A to 5A? Isn't that a bit high?
5amp works for me.
Either way, just because a power supply is rated at 5A, doesn't mean it's blindly feeding that much juice to the router. It simply means that it's capable of supplying that much, should the router need it. _________________ WRT600N v1.0 & v1.1 - Eko 12548M std-nokaid NEWD-2
Joined: 15 Apr 2007 Posts: 200 Location: Buffalo, NY
Posted: Wed Jul 01, 2009 16:49 Post subject:
Radioman do you have a way to measure the current on the new supply to see what the actual draw is??
FYI (to those that don't know): just cause it says it will do 5 Amps it does not mean the unit is drawing it it will only take what it wants.
Also on my wrt54g v3 its been running 251mw for at least 4 years 24/7 and not a single problem. i think the secret is just keep good air flow around the unit.
Thats right a switching power supply will only deliver what the load needs upto the power supplys max and go into protect and the output will be cut off.
.................................................
Yes I can and Have
2.68 Amp not in use just powered on .
>Your results may vary<
your current load will go up ?% under Cpu load and switch load.
I have not tested Max current draw . 5anp for the power supply was a logical conclusion
takeing in to consideration the + - 5 to 10% you shuld have Over the needed Max current draw .
_________________ You can find me Here:
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And Remember even at MAX output
the hottest Item in your router is the Switch.
Always Use Heatsinks
I Do and With Articsilver.
_________________ You can find me Here:
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Last edited by Radioman193 on Wed Jul 01, 2009 20:38; edited 1 time in total
The only information you need to have in order to find the correct power supply for your device is the Voltage / Volts (V) and Amperage / Amps (A).
Voltage has to be an exact match. A 12V DC device needs a 12V DC adapter.
Amperage is the amount of power your device uses. The adapter you order has to be able to supply AT LEAST the amount of Amps your device draws. If your device states it is 12V 3A, a 3A adapter can handle that load, but so can a 4A and 5A. The higher amperage (amp) power supply will not have to work as hard to handle a smaller load, and will run cooler and more stable.
Common sense, but there you have it. _________________ WRT600N v1.0 & v1.1 - Eko 12548M std-nokaid NEWD-2
But, what if the device IS capable of drawing more, but in the process will also create more heat? Could the engineers be using the limitation in the AC adapter as a method of keeping the heat issues minimized? Obviously if there isn't enough power available to cause overheating, overheating can't be a problem.
I *think* what is being said here is that the router is capable of drawing more power, and will perform better if there is more power available, and to get amplification/greater dbi there NEEDS to be more power, but that this will also create more heat that needs to be properly dealt with and that hasn't necessarily been engineered for. _________________ SIG:
I'm trying to teach you to fish, not give you a fish. If you just want a fish, wait for a fisherman who hands them out. I'm more of a fishing instructor.
LOM: "If you show that you have not bothered to read the forum announcements or to follow the advices in them then the level of help available for you will drop substantially, also known as Murrkf's law.."
But, what if the device IS capable of drawing more, but in the process will also create more heat? Could the engineers be using the limitation in the AC adapter as a method of keeping the heat issues minimized? Obviously if there isn't enough power available to cause overheating, overheating can't be a problem.
I *think* what is being said here is that the router is capable of drawing more power, and will perform better if there is more power available, and to get amplification/greater dbi there NEEDS to be more power, but that this will also create more heat that needs to be properly dealt with and that hasn't necessarily been engineered for.
Joined: 26 Jan 2008 Posts: 13049 Location: Behind The Reset Button
Posted: Wed Jul 01, 2009 20:10 Post subject:
My 2 cents (I am almost out of cents )
You never know but I would think that engineering a device by limiting it's power supply (available current) would be a 1/2 a$$ed way of doing it. Again you never know but I don't think that is what the engineers had in mind.
The PS's could be a bit undersized as a cost cutting method. Just big enough but no "head room" available.
If your audio amp does not have the balls to drive your speakers... what happens? You get clipping & distortion, no "punch", etc. Not exactly the same as powering a router but a pretty close analogy. _________________ [Moderator Deleted]