In comp.sys.raspberry-pi Michael J. Mahon  wrote:
> Computer Nerd Kev  wrote:
>> In alt.internet.wireless A. Dumas  wrote:
>>> Computer Nerd Kev wrote, on 20-04-2019 03:32:
>>>> A Pi ZeroW is on its way. I might see how I go with the onboard
>>>> WiFi for starters, Perhaps putting a heatsink on the WiFi chip
>>>> will help against the burn-out issues as it's presumably due to
>>>> something overheating.
>>>
>>> I saw that earlier in the thread but that seemed like bullshit where
>>> they manually tried to boost the power to the wifi chip, maybe removing
>>> a resistor somewhere or otherwise cranking up the voltage, I don't know.
>>> Don't do that, obviously.
>>
>> I do plan to add an external antenna. With RF anything is possible,
>> but in theory I don't think that should increase the risk, and if the
>> Pi needs to use less power or do fewer retransmissions, that may help
>> prevent overheating in relative terms.
>
> An impedance mismatch between the RF chip and the antenna can cause
> significant impact to the power dissipated by the chip. (And mismatches are
> pretty easy to get at 2.4GHz.)

Well I was going to pull a WiFi antenna out of another old router.
Are they all likely to be close enough, or should I look into the
figures properly?

I've hapily connected any convenient WiFi antenna to PCI WiFi cards
in the past without concern for impedance differences, and got away
with it so far.

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