antennas from scrap computers

[Martin]

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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