DB, here is Bob85's image of the New Vector 4000 that I use for the specs on my NV4K models.
Bandwidth is 1.60 MHz at 27.205 Range 26.400 - 28.000 MHz <2.00:1 SWR.
In case the dimensions are hard to read in the image below.
Radiator at 27.205 MHz is 317.5' x 0.75" with the Top Hat...or 322.5" x 0.75" without the Top Hat.
Radials are 106.5" x 0.50".
Radial Loop is 29.9" x 0.375" in diameter or 94" x 0.375 inches in circumference.
The mounting area is 13.75" x 1.456" in the model below the radial bracket.
If you do not include the Top Hat basket on top in your model I find adding 5" inches works well to restore resonance.
There may be better dimensions for this antenna, but I prefer to stick to specs. If I find better performance in a model that I modify or is suggested...then I try and make sure to note that in my post.
Models below.
1. Vector specs nM 122417 FS this model shows the Average Gain results in Free Space. I used this model to make the model below that is over Real Earth.
2. Vector specs wM 36' ISO 122417 this model has no Top Hat and is 5" inches longer at 322.5 inches. The model is over Real Earth using Average Ground.There is no gamma match included but is direct fed at some 50 ohm point above the bottom of the radiator. IMO, this is just like Henry tells us is possible in his article on " The Avanti Sigma 4."
3. Image of the New Vector 4000 with dimensions as Bob posted a while back. I added some notes for the dimensions I got from Bob's work.
