[VWS] Re: antennas from scrap computers

[Jacek Radzikowski]

Another good source of power amplifiers for the 13cm band is equipment for
satellite stations for communication through OQ-100. Almost immediately
after its launch several years ago the satellite became a very popular mode
of communication, and there are many sources of relatively cheap TX
hardware for such stations. This is an example of an 20W PA for the 13cm
band: http://www.sg-lab.com/AMP2400/amp2400.html
The downlink uses the 3cm band, so unlike the wifi amps, the 13cm
amplifiers are TX only.

Jacek
kw4ep


On Sun, 30 Oct 2022 at 21:15, Jacek Radzikowski <jacek.radzikowski at gmail.com>
wrote:

> 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]
>>>> _______________________________________________
>>>> Tacos mailing list
>>>> Tacos at amrad.org
>>>> https://lists.amrad.org/mailman/listinfo/tacos
>>>>
>>> _______________________________________________
>>> Tacos mailing list
>>> Tacos at amrad.org
>>> https://lists.amrad.org/mailman/listinfo/tacos
>>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "VWS General Discussions" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to VWS-General+unsubscribe at googlegroups.com.
>> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/VWS-General/CADyr31qYeoAJt_xpycBQ6ybeA8KvXEFv5MDOLB6HyLzGCiDXyw%40mail.gmail.com
>> <https://groups.google.com/d/msgid/VWS-General/CADyr31qYeoAJt_xpycBQ6ybeA8KvXEFv5MDOLB6HyLzGCiDXyw%40mail.gmail.com?utm_medium=email&utm_source=footer>
>> .
>>
>
>
> --
> Given a choice between two theories, take the one which is funnier
>


-- 
Given a choice between two theories, take the one which is funnier
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.amrad.org/pipermail/tacos/attachments/20221030/d903b9b4/attachment-0001.html>