[Leaplist] Replies to "an ipcop question"

[Hank Lambert]

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I have been reading quite a bit about overheating problems so I
assumed that was an issue. I haven't increased the power on mine yet,
so I don't have any personal experience. I did assume the power
limitation was due to FCC restrictions.

I also agree that a good antenna is a much better solution to
increasing power. I want to build my own set of antennas as I am
installing all of my gear in an equipment cabinet, and need to have
the antenna's located outside the cabinet (Faraday effect is not a
friend of good signal strength).

- --Hank


Fred Moore wrote:
> Hank Lambert wrote:
>> Very true. It's not that the new firmware will drive the
>> transmitter more, it's that the stock firmware limits the power
>> output. It's my understanding that the Linksys wireless devices
>> are limited to somewhere around 24 mw; I believe that is 24 mw
>> into the amplifier, but I am not positive on that. DD-WRT and
>> Tomato Firmware will allow you to increase the power level to 251
>> mw, which is the limit of the transmitter.
>>
>> Being that Linksys did not design the ritter/wap to operate at
>> that level, they did not provide adequate cooling for running the
>> device at these increased power levels, and doing so will more
>> than likely burn up the CPU. You can add a heat sink to the CPU,
>> one like a video GPU cooler, and a cooling fan to get around the
>> overheating problem. My best friend Google found many sites
>> explaining how to do this. Personally, I would like to see a
>> water-cooled Linksys WRT-54GL :)
>>
>> Increasing the power output is not the only way to increase
>> range, and might not be the best option anyway (increasing power
>> can increase noise). Quite a while ago Phil sent 3 e-mails with
>> links on how to make high-gain antenna's for wifi devices. I lost
>> those links when my laptop died, but maybe Phil and/or others
>> might have those links and repost them. Now that I think about
>> it, I would get more satisfaction from getter better performance
>> from home brew antenna's than cranking up the power.
>>
>> --Hank
>>
>>
>> Aaron Morrison wrote:
>>> On 15 Dec 2008, at 18:55, William Warren wrote:
>>>> also find a router that is suported by dd-wrt as it can also
>>>> increase the radio's output.
>>>>
>>>> --
>>> This has less to do with dd-wrt than the firmware in the access
>>>  point itself.  There are a number of reasons why power output
>>> may be restricted (reliability, compliance with FCC rules for
>>> ERP (Effective Radiated Power) or spectral purity, etc.)  If
>>> the hardware doesn't support it, then all the software in the
>>> world won't help increase power output. --am
>>> _______________________________________________ Leaplist
>>> mailing list Leaplist at leap-cf.org
>>> http://lists.leap-cf.org/mailman/listinfo/leaplist
>
> Actually it was designed to run at 250 mw.  Europe allows higher
> power.   if you run an external amplifier you actually may need to
> decrease the power for spectral purity... I have not seen any
> heating problem.. The best way to obtain gain is with the antenna
> its...free.. Fred
>
>
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