• You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
  • The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

DB, if you could post the images of the 1/4 wave model you saw that showed the impedance at 35 ohms then maybe I can detect something that would fix my model, or help me explain what we are seeing.

 

I'll go look for some old Cebik 1/4 wave models and post them if I can find such showing 35 ohms. I too always believed the 1/4 would show 35 ohms at the feed point, but in 2009, I did some testing of the 1/4 wave antenna and that is when I saw the real world antenna never show 35 ohms with 3 or 4 horizontal radials. In the process of doing this testing with 102" whips I developed the idea for my Marconi 4x and the 5x with 4 radials using 102" ss whips.

 

A couple of years later I was challenged to learn Eznec and when I made 1/4 wave models with 102" elements...I did not see 35 ohms at the feed point when the antenna was resonant again. For me this confirmed my real world findings.

 

If I'm wrong, then maybe your links to the observations you saw will set me straight.