Still, nicely done. Thanks for your efforts and explanations.

tom
K0TAR

Figure 22 of http://www.qsl.net/i0jx/ros.html separately shows loss caused by
copper (in red) and loss caused by dielectric (in blue) for a 100-meter run
(about 330 feet) of LMR-400 coax (similar to RG-213 with foam dielectric) versus
frequency.

The formulas used for the plot are shown just above it.

Though it is in italian, it should be easily understandable.

73

Tony I0JX
Rome, Italy