Bob I didn't have all your dimensions, so I scaled my NV4K model at 27.205 to 50 MHz. That changed the radial bracket dimensions at the bottom too, and in the model above it is set at 1.36" inches. That too will change my tuning of the model.
The model also has a simulated gamma also, and with a physical gamma added to the model...it may have shown a bit more gain.
The FS model shows the Average Gain results, and that shows us the gain for the model above is understated...needing an error correction of 0.02 dbi. This error needs to be added to the reported gain to be correct.
I posted 2 images of the antenna, so you could see the dimensions I used for the radiator and radials, noted at the bottom left of the images.
The radials are a bit short too, but again that is due to a little geometry error in scaling the model to 50 MHz.
When I have a model set in inches or feet and I scale...the scaling changes the dimensions. I can change all the dimensions to wire gauge values and those values will remain the same when using the scaling feature. I didn't bother figuring all that out.
So, I just guessed at some dimensions I was missing.
If I had the gamma dimension I noted in my post above, I would have done the model using a physical gamma match.
Bob, you're not old yet. Wait until you get to 83 and have to watch all the details when making an Eznec model. To bad you didn't follow me on this journey back in the days when I started modeling.
With your understanding, you'd have be good at it.
