DISCLAIMER: My brain does not function well due to my Encephalopathy caused by MELAS so this may or may not be correct.
According to the drawing in Post #1, the two closest radials form a triangle. The angles should be 120, 30, and 30 degrees (I think). The radials are the same length and the third side is 19 inches. Throwing those numbers into the triangle calculator at:
Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with in-depth information.
calculator.net
The radials should be 10.96966 inches each.
View attachment 169748
View attachment 169749
Knowing that, the radials should be tuned (theoretically) to 255.9894 MHz.
Am I correct with all of that? TIA!