[QUOTE=abcd567;n184155][B]Wire Collinear with Coil & Ground Plane
(1) SIMULATION: Lower Radiator = 60mm, Upper Radiator = 137mm
SWR = 1.69
Gain = 4.98
Coiled Whip - 60mm lower- Radials 45 degree down.png
That looks really good - I'm going to make one.
My colinears have been very successful but I have no way to do the detailed analysis of them that you clearly do so this would be an excellent antenna to do comparisons with.
Just one question if I could. Your coil diameter is 5 mm - hopefully that's the internal measurement, ie was it wound on a 5 mm rod / drill bit?. I was planning using 1.67 mm diameter copper from the inner of some co-ax I have so if it's the outer diameter it would need to be wound on a 1.66 mm drill which wouldn't be practical.
Scroggie
(1) SIMULATION: Lower Radiator = 60mm, Upper Radiator = 137mm
SWR = 1.69
Gain = 4.98
Coiled Whip - 60mm lower- Radials 45 degree down.png
That looks really good - I'm going to make one.
My colinears have been very successful but I have no way to do the detailed analysis of them that you clearly do so this would be an excellent antenna to do comparisons with.
Just one question if I could. Your coil diameter is 5 mm - hopefully that's the internal measurement, ie was it wound on a 5 mm rod / drill bit?. I was planning using 1.67 mm diameter copper from the inner of some co-ax I have so if it's the outer diameter it would need to be wound on a 1.66 mm drill which wouldn't be practical.
Scroggie
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