[VWS] Re: antennas from scrap computers

[Jacek Radzikowski]

Most of the wifi amplifiers should also cover the ham radio band. You may
have to modify the activation circuit, because they use signal sensing to
switch between RX and TX

Jacek
kw4ep


On Sun, 30 Oct 2022 at 21:11, Martin <dcmk1mr2 at gmail.com> wrote:

> Sorta related - does anyone know of amps in the 13 cm ham range that put
> out more than a 0.5 W?
>
> Martin W6MRR
>
> On Sun, Oct 30, 2022 at 2:05 PM Samudra Haque <samudra.haque at gmail.com>
> wrote:
>
>> Phased arrays? PA controller chips are plentiful
>>
>> On Sun, Oct 30, 2022, 15:53 Alex Fraser <beatnic at comcast.net> wrote:
>>
>>> You can fit a whole bunch of 13 centimeter band antennas in a small
>>> plastic jar.  That's just what I did when I scrapped out some older
>>> laptops.  The antennas are usually behind the display screen so when it is
>>> being used the antennas sit up a bit from your desk.  The tiny coax runs
>>> behind the screen and next to the hinges to the WiFi card on the laptop's
>>> motherboard.
>>>
>>> It looks to me like some of these antennas are J Poles, I hope you can
>>> see where I circled the matching coax location.
>>>
>>> My application for these antennas is as  replacements for busted WiFi
>>> antennas on a DJI Phantom 3 drones video and telemetry download radio.  I
>>> bought the drone used and it had been in a crash, so I got a good price.
>>> The original antennas had their cables yanked apart. The originals were
>>> panel antennas and go used for  $20 ~ $30. I might try both kinds and see
>>> how they work in the crazy drone environment. Drones move around so
>>> polarity and pattern have to be figured into the antennas.  There is a lot
>>> of ham input into the drone hobby.  Having almost 40 years experience
>>> playing with antennas sure helps...
>>>
>>>
>>> [image: Antennas]
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