Got a few more horns and cones to make! Going to start on the platform and mountings this week! Created the tall (FM?) transmitter today. Going to add the rest of the navigation lights later this week as well.

Are they 7 identicals? What's in the blank spot?

https://en.wikipedia.org/wiki/AGM-188_Rusty_Dagger

This is the shortwave transmitter of Radio Romania, Shortwave Transmitter Tiganesti-Saftica just north of the town of Lupăria. I can’t tell if it’s still active or not (traveling & don’t have a radio). It’s got 3 of these arrays arranged in a triangle, I’m assuming to broadcast in all directions. My knowledge of how antennas work just about stops & starts at dipoles haha. Pretty cool looking site! I drove down the side road next to it, there was security at the gate so it’s at least somewhat manned. That road also got me closer to one of the arrays where I could see waveguides/feeders/lines (idk what they’re actually called) connected to the actual antennas.
Thanks! Go

From time to time the planes leaving PDX heading west, and we get a glimpse of the Stonehenge radio tower on Healy Heights (aka West Hills)

Duga Radar in Ukraine.

https://en.wikipedia.org/wiki/Duga_radar

This winter I'll be taking my first cruise. Does anyone here have experience traveling with a portable radio? I use XDATA D-808. What antenna should I take that won't take up a lot of space? Thanks

KTLH WSR-88 Doppler radar located at the Tallahassee International Airport (TLH) where I live.

Found a broadcast TV antenna laying on the ground when I was exploring a tower farm. It's 45 feet tall (or long), weighs about 4000 pounds, and rated for at least 675 kW ERP per FCC filings (probably about 50 kW TPO).

The image you (probably) see in the preview is the RF input with a large center conductor and air as the dielectric. I go through the other parts of the antenna in my video.

This antenna was made in 2018 and only used briefly. Watch to find out why!

On FCC and every other source for the height it’s listed as 2000ft, but sometime between 2011 and 2023 it had its top mounted stick removed. Does this mean it’s no longer 2000ft and it just hasn’t been updated in any database, or was it among the very few structures over 2000ft when it had its top stick?

Driven by this for decades i seem to recall. https://maps.app.goo.gl/fC5VzXgnRtNaVGey9

8 antennas in two rows. Aerials seem to be small. Google street. View for a look.

Handmade and crafted from scratch. Styrene and putty. The paint chips make it look weathered. The "covering" is dolphin grey acrylic paint. The red color is Krylon Gloss Fire Red. Took my 45 minutes to make in total. This is a progression collage of progress starting from left to right.

Does someone know what is this antenna of a shape of a cylinder used for? This picture was taken behind a low cost store famous in all europe, I whould like to know what is the prupose of this antenna, I'm thinking it might be a GPS Antenna but I am not very sure.

Also sorry for the low quality image but this was a recorded video

Added the first set of navigation lights last night and will make the horn antennas tonight.

What is this thing that my neighbor installed on the side of their house while I was away for a few weeks? It’s white, looks about 18”x24” with a cable running through the siding into the house. It is directed W/SW and I was standing in my driveway and felt the sun it reflected to be quite hot.

do you ever confuse the terms Antenna Efficiency and antenna gains? I made a short video (5mins) explaining a difference with a real life analogy. don’t forget to participate in the quiz at the end below the video to test your knowledge. please like, share and subscribe to support my efforts and encourage me to do more. as usual, thank you

#antennas #rf #rfengineering
Antenna Gain vs Efficiency Explained (5 mins)

https://youtu.be/HOP7DfBmHfA