Hi. I live in NYC. Everyone knows we have a lot of buildings here. I buy the Ed Fong GMRS J-Pole Antenna. My communication are way much better that before and I have 100 ft of cable, that not good, but this Antenna Work Prefect.
The delay section of the super-J does not have to be made of twin lead and does not have to be a flat extension! It can be curved around the radiator. It will work fine. It can be made of stiff copper rod curved around the radiator using a steel can cut in half longitudinally, as a form to shape the phasing section. Also, I've always reversed the center conductor and shield connections rather than leaving the shield interrupted, in the coaxial colinears. I'm surprised it works with the shield. Interrupted - Kevin WA7VTD
you can make a home base uhf collinear 3dbi or 6dbi or 8dbi or 10dbi or 12bdi or dbd. short one,s are more use in hilly terrain the longer the antenna are used for flat terrain.
You've convinced me to make a "Slim Jim" rather than a colinear. I have some 300 ohm twinlead left from my days repairing TVs and installing TV antennas. Under 50W, I'm thinking this should work.
excellent explanation.
Mr Fong is such a brain when it comes to this stuff.
Hi. I live in NYC. Everyone knows we have a lot of buildings here. I buy the Ed Fong GMRS J-Pole Antenna. My communication are way much better that before and I have 100 ft of cable, that not good, but this Antenna Work Prefect.
Thanks for all of the great information 👍
Thanks for putting this up. Helpful primer on collinear antennas.
hi mate, thanks for sharing !!!
Presentation starts 1:54
Great video….thanks++++++++++
The delay section of the super-J does not have to be made of twin lead and does not have to be a flat extension! It can be curved around the radiator. It will work fine. It can be made of stiff copper rod curved around the radiator using a steel can cut in half longitudinally, as a form to shape the phasing section. Also, I've always reversed the center conductor and shield connections rather than leaving the shield interrupted, in the coaxial colinears. I'm surprised it works with the shield. Interrupted - Kevin WA7VTD
you can make a home base uhf collinear 3dbi or 6dbi or 8dbi or 10dbi or 12bdi or dbd. short one,s are more use in hilly terrain the longer the antenna are used for flat terrain.
You've convinced me to make a "Slim Jim" rather than a colinear. I have some 300 ohm twinlead left from my days repairing TVs and installing TV antennas. Under 50W, I'm thinking this should work.
I have always found a Slim Jim to be the best performing antenna. Colinears are not that useful.
coil delay how to calculate inductance
2.4 ghz antenna? thanks
Still use your antennas!
I make a colinear super j pole whit 4 phases,,, incredible
are you guys trying to make a 477mhz uhf cb antenna
CB is 27MHz. Did you mean GMRS?
477MHz is Australian UHF CB. They also have conventional 27Meg CB .
2:31 😂 This didn’t age well 💉