2022-01-23

The Apartment Antenna (continued Saga)

 Remember this antenna I was working on?












Well, I had no idea of how well it would perform or its
characteristics, well, now I do, here is a graph of
the SWR on it across the entire HF spectrum:










The SWR is high (sometimes EXCEEDINGLY high)
where I need it low, and low where I don't care.

It does this same form of pattern right up to
about 54 Mhz, then there is one last dip at around 60 Mhz,
from there up, it is high.

I have been using it with an antenna tuner, but, due to
the location on our deck, and the, sub-optimal
performance shown above, I'm not making a horrendous
number of contacts.

Add having to use low power and I am not overly impressed,
guess I need to change the design...

Oh well, onward and upward.

Update:

The connection between the VNA and the antenna
was jury-rigged in the image above, but, with a
proper SMA to PL259 adapter, the differences
aren't that great.







γ˜γ‚ƒγΎγŸ

2022-01-21

Score!

Well, I won a scope!

I just don't win stuff, so, I am chuffed.
This was actually a couple of years ago, but hey,
better posted later than never, right? 😁


Wa Happened?

 Well that was R*E*A*L fun...

NOT!

 99% of my images disappeared from the blog...
16 YEARS WORTH! I just spent two days putting them back
(fortunately, I had an archive) but it was a ton of work.

Google, what the heck did you do to my blog?

Not happy.

γ˜γ‚ƒγΎγŸ。
2022-01-19

Beitian BN-880 GPs and Compass Module Experiments - 1

 So this will be a quick post, links mostly.

I decided to get a Beitian BN-880 GPS/Compass module
for experiments I have in mind.

So, I hooked it up to an Arduino Uno.
Here is the wiring diagram:









Note, the wiring colors are meaningless, as each
manufacturer supplies cables with different colored
leads. As you can see here, red is not power, and
black is not ground.

 The sketch I used to test the set-up came from the GPS library:

TinyGPS++

Click for Github page.

The sketch I demo in the video is the basic example.

 The video:


γ˜γ‚ƒγΎγŸ


2022-01-16

Vlog

 If you want to see my projects in video format, visit my VLOG:

https://rumble.com/user/number6of1

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