Bubba-Tech Parabolic Dish Antenna

[secret squirrel]

This is just my imagination and coffee deficiency this morning, My older brother had an old school original satellite TV dish back in the 1990s. It was laying at the edge of his yard on the ground for years. This is in no way practical, but has anyone ever tried to make a Vertical 11 meter Dipole, bend lower leg make it directional and mount in the center of dish.. Then set the dish contraption back up in place and aim it as needed. If I had the room I might try it just to tell the neighbors I have Satellite CB. What's the goofiest home brew, beer driven antennas you all ever made in the garage?

 

[AudioShockwav]

Sure you could do it, if you got the money.
The Stanford Research Institute has a dish that works down to 150mhz.
They built this 150-foot-diameter dish in 1961.
The cost to construct the antenna was $4.5 million, and was funded by the United States Air Force.
You would just have to scale it for 27 Mhz and get a few friends to help with the cost.
Just buy a Stargun antenna from Troy and mount it on a Honda Prius, that's goofy enough to impress the neighborhood........

Lol

73
Jeff

 

[Xracerx13]

 

[AudioShockwav]

View attachment 67994

Stargun at its finest

73
Jeff

 

[Uncle Ronnie 336]

i would make a fullwave loop and a director myself if it was a huge dish.

 

[nomadradio]

Hmm. 150-foot dish works okay at 150 MHz?

So, at more or less six times the wavelength, you should need a 900-foot reflector to do the same job at 27 MHz.

Best of luck with that.

73

 

[AudioShockwav]

Only five times bigger than this one.

73
Jeff

 

[Shadetree Mechanic]

File:Hammer Ace SATCOM Antenna.jpg - Wikipedia

en.m.wikipedia.org

 

[Shadetree Mechanic]

How about the Direct Drive Ring Radiator?

CB Antenna DDRR - CQDX11.net | CB Radio | Citizens Band Radio | HF DX 27MHz

CB Antenna DDRR - CQDX11.net | CB Radio | Citizens Band Radio | HF DX 27MHz

cqdx11.net

DIY CB Radio Antenna Quarter Wave DDRR 12 Inches High Low Noise - CB Radio | Citizens Band Radio

DIY CB Radio Antenna Quarter Wave DDRR 12 Inches High Low Noise CB Radio | Citizens Band Radio

cqdx11.com

Build CB 11metre 27MHz DDRR Quarter Wave Vertical Performance LOW Noise - AX CB Radio Club | Alpha Xray CB Club Global

The DDRR CB Radio Antenna is now booming across Australia on skip and proving to be much quieter than the 1/4 Wave 9' Whip!

alphaxray.info

 

[TM86]

If you want to build a dish here's a calculator to help you figure out how big a dish you'll need to get a particular gain number at a given frequency:

Parabolic Reflector Antenna Gain Calculator - everything RF

www.everythingrf.com

I played with it a bit. You're going to need a huge dish to beat the claimed dB gain of beam antennas. You could probably build something smaller, similar to the "Elephant Ear" antenna I saw an ad for years ago. But the performance may not be up to par.

 

[Greg T]

If you had a 10' or 12' C Band dish it would seem to me that mounting a whip across the diameter of the dish would make it directional, no? Would probably be a hell of a job to get the match down.