5/8 wave ground plane 11 meters

[Christopher17]

for my next antenna project I'm doing 5/8 wave ground plane , my design uses aproximatly 21 foot driven element with four 1/4 wave 102" radials set at 45° , unlike my current homebrew 1/4 wave ground plane the new one will require some kind of matching transformer, I have seen some balancers made with coils of wire and some using a capacitor along with coils of wire, buying a balun is not out of the question, I would like to be able to make my own if I could understand it better.

 

[sp5it]

http://www.ve3sqb.com/
http://www.ve3sqb.com/vert.zip

Calculate and build.
Mike

 

[Christopher17]

Interesting reading , the pi design overly complicated for a single use 11 meter
thinking something like this ?

 

[Christopher17]

then this but I don't understand

 

[Christopher17]

the 5/8 super penetrated does something similar to this for its balancer

 

[binrat]

Why not build from the diagram in this thread?
https://www.worldwidedx.com/threads/scaling-antennas.243114/#post-672890

 

[Christopher17]

thanks binrat

 

[binrat]

thanks binrat

Oh, it was never built unless there is pictures.

 

[Christopher17]

will add pics when completed

 

[Christopher17]

looking at this simple solution , has anyone have experience with this kind of matching transformer, I am assuming the tap point is critical depending on what frequency, this looks similar to the matching transformer on the Hy-Gain 5/8 ground plane , may just have to play with it , think I could make it variable with a hose clamp , move it around the ring to get best receive, no analyzer as of yet

 

[binrat]

When I did one I just wrapped the wire around it until I got the antenna resonant, then soldered it.

 

[Bluestone]

looking at this simple solution , has anyone have experience with this kind of matching transformer, I am assuming the tap point is critical depending on what frequency, this looks similar to the matching transformer on the Hy-Gain 5/8 ground plane , may just have to play with it , think I could make it variable with a hose clamp , move it around the ring to get best receive, no analyzer as of yet

This one works great I built this exact design, works great. Good signal and good for dx

 

[HomerBB]

All you need is a coil (inductor).
Bottom of coil and coax shield to the radials.
Center conductor of coax to the 50 Ohm tap point on the coil. Top of coil to the vertical radiator.
The radials are isolated from the vertical radiator except through the coil itself. The radials are located at the bottom of the coil where the braid attaches.

 

[HomerBB]

The 5/8 will perform better with horizontal radials.

 

[HomerBB]